/**
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* Tencent is pleased to support the open source community by making QMUI_iOS available.
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* Copyright (C) 2016-2021 THL A29 Limited, a Tencent company. All rights reserved.
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* Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
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*/
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//
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// QMUINavigationButton.m
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// QMUIKit
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//
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// Created by QMUI Team on 2018/4/9.
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//
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#import "QMUINavigationButton.h"
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#import "QMUICore.h"
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#import "UIImage+QMUI.h"
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#import "UIColor+QMUI.h"
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#import "UIViewController+QMUI.h"
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#import "QMUINavigationController.h"
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#import "UIControl+QMUI.h"
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#import "UIView+QMUI.h"
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#import "NSString+QMUI.h"
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#import "UINavigationController+QMUI.h"
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#import "UINavigationItem+QMUI.h"
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#import "UINavigationBar+QMUI.h"
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#import "NSArray+QMUI.h"
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typedef NS_ENUM(NSInteger, QMUINavigationButtonPosition) {
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QMUINavigationButtonPositionNone = -1, // 不处于navigationBar最左（右）边的按钮，则使用None。用None则不会在alignmentRectInsets里调整位置
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QMUINavigationButtonPositionLeft, // 用于leftBarButtonItem，如果用于leftBarButtonItems，则只对最左边的item使用，其他item使用QMUINavigationButtonPositionNone
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QMUINavigationButtonPositionRight, // 用于rightBarButtonItem，如果用于rightBarButtonItems，则只对最右边的item使用，其他item使用QMUINavigationButtonPositionNone
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};
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@interface QMUINavigationButton()
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@property(nonatomic, assign) QMUINavigationButtonPosition buttonPosition;
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@property(nonatomic, strong) UIImage *defaultHighlightedImage;// 在 set normal image 时自动拿 normal image 加 alpha 作为 highlighted image
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@property(nonatomic, strong) UIImage *defaultDisabledImage;// 在 set normal image 时自动拿 normal image 加 alpha 作为 disabled image
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@end
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@implementation QMUINavigationButton
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- (instancetype)init {
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return [self initWithType:QMUINavigationButtonTypeNormal];
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}
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- (instancetype)initWithType:(QMUINavigationButtonType)type {
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return [self initWithType:type title:nil];
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}
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- (instancetype)initWithType:(QMUINavigationButtonType)type title:(NSString *)title {
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if (self = [super initWithFrame:CGRectZero]) {
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_type = type;
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self.buttonPosition = QMUINavigationButtonPositionNone;
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[self setTitle:title forState:UIControlStateNormal];
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[self renderButtonStyle];
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[self sizeToFit];
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}
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return self;
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}
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- (instancetype)initWithImage:(UIImage *)image {
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if (self = [self initWithType:QMUINavigationButtonTypeImage]) {
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[self setImage:image forState:UIControlStateNormal];
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[self sizeToFit];
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}
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return self;
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}
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- (void)renderButtonStyle {
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UIFont *font = NavBarButtonFont;
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if (font) {
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self.titleLabel.font = font;
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}
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self.titleLabel.backgroundColor = UIColorClear;
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self.titleLabel.lineBreakMode = NSLineBreakByTruncatingTail;
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self.contentMode = UIViewContentModeCenter;
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self.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
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self.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
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self.qmui_automaticallyAdjustTouchHighlightedInScrollView = YES;
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// UIBarButtonItem 默认都是跟随 tintColor 的，所以这里让图片也是用 alwaysTemplate 模式
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self.adjustsImageTintColorAutomatically = YES;
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if (self.type == QMUINavigationButtonTypeImage) {
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// 让 iOS 11 及以后也能走到 alignmentRectInsets，iOS 10 及以前的系统就算不置为 NO 也可以走到 alignmentRectInsets，从而保证 image 类型的按钮的布局、间距与系统的保持一致
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self.translatesAutoresizingMaskIntoConstraints = NO;
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}
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// 系统默认对 highlighted 和 disabled 的图片的表现是变身色，但 UIBarButtonItem 是 alpha，为了与 UIBarButtonItem 表现一致，这里禁用了 UIButton 默认的行为，然后通过重写 setImage:forState:，自动将 normal image 处理为对应的 highlighted image 和 disabled image
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self.adjustsImageWhenHighlighted = NO;
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self.adjustsImageWhenDisabled = NO;
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switch (self.type) {
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case QMUINavigationButtonTypeNormal:
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break;
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case QMUINavigationButtonTypeImage:
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// 拓展宽度，以保证用 leftBarButtonItems/rightBarButtonItems 时，按钮与按钮之间间距与系统的保持一致
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self.contentEdgeInsets = UIEdgeInsetsMake(0, 11, 0, 11);
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break;
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case QMUINavigationButtonTypeBold: {
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font = NavBarButtonFontBold;
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if (font) {
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self.titleLabel.font = font;
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}
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}
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break;
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case QMUINavigationButtonTypeBack: {
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self.qmui_outsideEdge = UIEdgeInsetsMake(-12, -12, -24, -24);
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UIImage *backIndicatorImage = UINavigationBar.qmui_appearanceConfigured.backIndicatorImage;
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if (!backIndicatorImage) {
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// 配置表没有自定义的图片，则按照系统的返回按钮图片样式创建一张，颜色按照 tintColor 来
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UIColor *tintColor = QMUICMIActivated ? NavBarTintColor : UIColor.qmui_systemTintColor;
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backIndicatorImage = [UIImage qmui_imageWithShape:QMUIImageShapeNavBack size:CGSizeMake(13, 23) lineWidth:3 tintColor:tintColor];
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}
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[self setImage:backIndicatorImage forState:UIControlStateNormal];
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[self setImage:[backIndicatorImage qmui_imageWithAlpha:NavBarHighlightedAlpha] forState:UIControlStateHighlighted];
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[self setImage:[backIndicatorImage qmui_imageWithAlpha:NavBarDisabledAlpha] forState:UIControlStateDisabled];
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self.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
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// @warning 这些数值都是每个iOS版本核对过没问题的，如果修改则要检查要每个版本里与系统UIBarButtonItem的布局是否一致
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UIOffset titleOffsetBaseOnSystem = UIOffsetMake(6, 0);// 经过这些数值的调整后，自定义返回按钮的位置才能和系统默认返回按钮的位置对准，而配置表里设置的值是在这个调整的基础上再调整
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UIOffset configurationOffset = NavBarBarBackButtonTitlePositionAdjustment;
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self.titleEdgeInsets = UIEdgeInsetsMake(titleOffsetBaseOnSystem.vertical + configurationOffset.vertical, titleOffsetBaseOnSystem.horizontal + configurationOffset.horizontal, -titleOffsetBaseOnSystem.vertical - configurationOffset.vertical, -titleOffsetBaseOnSystem.horizontal - configurationOffset.horizontal);
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self.contentEdgeInsets = UIEdgeInsetsMake(0,
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0,
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0,
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self.titleEdgeInsets.left);
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}
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break;
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default:
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break;
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}
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}
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- (void)setImage:(UIImage *)image forState:(UIControlState)state {
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if (image && self.adjustsImageTintColorAutomatically) {
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image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
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}
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if (image && [self imageForState:state] != image) {
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if (state == UIControlStateNormal) {
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// 将 normal image 处理成对应的 highlighted image 和 disabled image
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self.defaultHighlightedImage = [[image qmui_imageWithAlpha:NavBarHighlightedAlpha] imageWithRenderingMode:image.renderingMode];
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[self setImage:self.defaultHighlightedImage forState:UIControlStateHighlighted];
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self.defaultDisabledImage = [[image qmui_imageWithAlpha:NavBarDisabledAlpha] imageWithRenderingMode:image.renderingMode];
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[self setImage:self.defaultDisabledImage forState:UIControlStateDisabled];
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} else {
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// 如果业务主动设置了非 normal 状态的 image，则把之前 QMUI 自动加上的两个 image 去掉，相当于认为业务希望完全控制这个按钮在所有 state 下的图片
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if (image != self.defaultHighlightedImage && image != self.defaultDisabledImage) {
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if ([self imageForState:UIControlStateHighlighted] == self.defaultHighlightedImage && state != UIControlStateHighlighted) {
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[self setImage:nil forState:UIControlStateHighlighted];
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}
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if ([self imageForState:UIControlStateDisabled] == self.defaultDisabledImage && state != UIControlStateDisabled) {
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[self setImage:nil forState:UIControlStateDisabled];
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}
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}
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}
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}
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[super setImage:image forState:state];
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}
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- (void)setAdjustsImageTintColorAutomatically:(BOOL)adjustsImageTintColorAutomatically {
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BOOL valueDifference = _adjustsImageTintColorAutomatically != adjustsImageTintColorAutomatically;
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_adjustsImageTintColorAutomatically = adjustsImageTintColorAutomatically;
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if (valueDifference) {
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[self updateImageRenderingModeIfNeeded];
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}
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}
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- (void)updateImageRenderingModeIfNeeded {
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if (self.currentImage) {
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NSArray<NSNumber *> *states = @[@(UIControlStateNormal), @(UIControlStateHighlighted), @(UIControlStateSelected), @(UIControlStateSelected|UIControlStateHighlighted), @(UIControlStateDisabled)];
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for (NSNumber *number in states) {
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UIImage *image = [self imageForState:number.unsignedIntegerValue];
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if (!image) {
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return;
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}
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if (self.adjustsImageTintColorAutomatically) {
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// 这里的 setImage: 操作不需要使用 renderingMode 对 image 重新处理，而是放到重写的 setImage:forState 里去做就行了
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[self setImage:image forState:[number unsignedIntegerValue]];
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} else {
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// 如果不需要用 template 的模式渲染，并且之前是使用 template 的，则把 renderingMode 改回 original
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[self setImage:[image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:[number unsignedIntegerValue]];
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}
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}
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}
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}
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// 自定义nav按钮，需要根据这个来修改title的三态颜色。
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- (void)tintColorDidChange {
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[super tintColorDidChange];
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[self setTitleColor:self.tintColor forState:UIControlStateNormal];
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[self setTitleColor:[self.tintColor colorWithAlphaComponent:NavBarHighlightedAlpha] forState:UIControlStateHighlighted];
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[self setTitleColor:[self.tintColor colorWithAlphaComponent:NavBarDisabledAlpha] forState:UIControlStateDisabled];
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}
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// 对按钮内容添加偏移，让UIBarButtonItem适配最新设备的系统行为，统一位置。注意 iOS 11 及以后，只有 image 类型的才会走进来
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- (UIEdgeInsets)alignmentRectInsets {
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UIEdgeInsets insets = [super alignmentRectInsets];
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if (self.type == QMUINavigationButtonTypeNormal || self.type == QMUINavigationButtonTypeBold) {
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// 对于奇数大小的字号，不同 iOS 版本的偏移策略不同，统一一下
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if (self.titleLabel.font.pointSize / 2.0 > 0) {
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insets.top = -PixelOne;
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insets.bottom = PixelOne;
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}
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} else if (self.type == QMUINavigationButtonTypeImage) {
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// 图片类型的按钮，分别对最左、最右那个按钮调整 inset（这里与 UINavigationItem(QMUINavigationButton) 里的 position 赋值配合使用）
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if (self.buttonPosition == QMUINavigationButtonPositionLeft) {
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insets.left = 11;
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} else if (self.buttonPosition == QMUINavigationButtonPositionRight) {
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insets.right = 11;
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}
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insets.top = 1;
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} else if (self.type == QMUINavigationButtonTypeBack) {
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insets.top = PixelOne;
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}
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return insets;
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}
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@end
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@implementation UIBarButtonItem (QMUINavigationButton)
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+ (instancetype)qmui_itemWithButton:(QMUINavigationButton *)button target:(nullable id)target action:(nullable SEL)action {
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if (!button) return nil;
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[button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
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return [[self alloc] initWithCustomView:button];
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}
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+ (instancetype)qmui_itemWithImage:(UIImage *)image target:(nullable id)target action:(nullable SEL)action {
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if (!image) return nil;
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return [[self alloc] initWithImage:image style:UIBarButtonItemStylePlain target:target action:action];
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}
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+ (instancetype)qmui_itemWithTitle:(NSString *)title target:(nullable id)target action:(nullable SEL)action {
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if (!title) return nil;
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return [[self alloc] initWithTitle:title style:UIBarButtonItemStylePlain target:target action:action];
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}
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+ (instancetype)qmui_itemWithBoldTitle:(NSString *)title target:(nullable id)target action:(nullable SEL)action {
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if (!title) return nil;
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return [[self alloc] initWithTitle:title style:UIBarButtonItemStyleDone target:target action:action];
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}
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+ (instancetype)qmui_backItemWithTitle:(nullable NSString *)title target:(nullable id)target action:(nullable SEL)action {
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QMUINavigationButton *button = [[QMUINavigationButton alloc] initWithType:QMUINavigationButtonTypeBack title:title];
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[button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
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UIBarButtonItem *barButtonItem = [[self alloc] initWithCustomView:button];
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return barButtonItem;
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}
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+ (instancetype)qmui_backItemWithTarget:(nullable id)target action:(nullable SEL)action {
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NSString *backTitle = nil;
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if (NeedsBackBarButtonItemTitle) {
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backTitle = @"返回"; // 默认文字用返回
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if ([target isKindOfClass:[UIViewController class]]) {
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UIViewController *viewController = (UIViewController *)target;
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UIViewController *previousViewController = viewController.qmui_previousViewController;
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if (previousViewController.navigationItem.backBarButtonItem) {
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// 如果前一个界面有主动设置返回按钮的文字，则取这个文字
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backTitle = previousViewController.navigationItem.backBarButtonItem.title;
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} else if ([viewController respondsToSelector:@selector(qmui_backBarButtonItemTitleWithPreviousViewController:)]) {
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// 否则看是否有通过 QMUI 提供的接口来设置返回按钮的文字，有就用它的值
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backTitle = [((UIViewController<QMUINavigationControllerAppearanceDelegate> *)viewController) qmui_backBarButtonItemTitleWithPreviousViewController:previousViewController];
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} else if (previousViewController.title) {
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// 否则取上一个界面的标题
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backTitle = previousViewController.title;
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}
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}
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} else {
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backTitle = @" ";
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}
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return [self qmui_backItemWithTitle:backTitle target:target action:action];
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}
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+ (instancetype)qmui_closeItemWithTarget:(nullable id)target action:(nullable SEL)action {
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UIBarButtonItem *closeItem = [[self alloc] initWithImage:NavBarCloseButtonImage style:UIBarButtonItemStylePlain target:target action:action];
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closeItem.accessibilityLabel = @"关闭";
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return closeItem;
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}
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+ (instancetype)qmui_fixedSpaceItemWithWidth:(CGFloat)width {
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UIBarButtonItem *item = [[self alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:NULL];
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item.width = width;
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return item;
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}
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+ (instancetype)qmui_flexibleSpaceItem {
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return [[self alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:NULL];
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}
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@end
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@interface UIBarButtonItem (QMUINavigationButton_Private)
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/// 判断当前的 UIBarButtonItem 是否是 QMUINavigationButton
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@property(nonatomic, assign, readonly) BOOL qmui_isCustomizedBarButtonItem;
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/// 判断当前的 UIBarButtonItem 是否是用 QMUINavigationButton 自定义返回按钮生成的
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@property(nonatomic, assign, readonly) BOOL qmui_isCustomizedBackBarButtonItem;
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/// 获取内部的 QMUINavigationButton（如果有的话）
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@property(nonatomic, strong, readonly) QMUINavigationButton *qmui_navigationButton;
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@end
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@interface UIViewController (QMUINavigationButton)
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@end
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@interface UINavigationBar (QMUINavigationButton)
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/// 判断当前的 UINavigationBar 的返回按钮是不是自定义的
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@property(nonatomic, readonly) BOOL qmui_customizingBackBarButtonItem;
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@end
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@implementation UIBarButtonItem (QMUINavigationButton_Private)
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- (BOOL)qmui_isCustomizedBarButtonItem {
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if (!self.customView) {
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return NO;
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}
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return [self.customView isKindOfClass:[QMUINavigationButton class]];
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}
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- (BOOL)qmui_isCustomizedBackBarButtonItem {
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return self.qmui_isCustomizedBarButtonItem && ((QMUINavigationButton *)self.customView).type == QMUINavigationButtonTypeBack;
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}
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- (QMUINavigationButton *)qmui_navigationButton {
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if ([self.customView isKindOfClass:[QMUINavigationButton class]]) {
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return (QMUINavigationButton *)self.customView;
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}
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return nil;
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}
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@end
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@implementation UINavigationItem (QMUINavigationButton)
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+ (void)load {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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SEL selectors[] = {
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@selector(setLeftBarButtonItem:animated:),
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@selector(setLeftBarButtonItems:animated:),
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@selector(setRightBarButtonItem:animated:),
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@selector(setRightBarButtonItems:animated:),
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};
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for (NSUInteger index = 0; index < sizeof(selectors) / sizeof(SEL); index++) {
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SEL originalSelector = selectors[index];
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SEL swizzledSelector = NSSelectorFromString([@"qmui_" stringByAppendingString:NSStringFromSelector(originalSelector)]);
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ExchangeImplementations([UINavigationItem class], originalSelector, swizzledSelector);
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}
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});
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}
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- (void)qmui_setLeftBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated {
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[self qmui_setLeftBarButtonItem:item animated:animated];
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// 自动给 position 赋值
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item.qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionLeft;
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}
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- (void)qmui_setLeftBarButtonItems:(NSArray<UIBarButtonItem *> *)items animated:(BOOL)animated {
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[self qmui_setLeftBarButtonItems:items animated:animated];
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// 自动给 position 赋值
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for (NSInteger i = 0; i < items.count; i++) {
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if (i == 0) {
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items[i].qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionLeft;
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} else {
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items[i].qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionNone;
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}
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}
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}
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- (void)qmui_setRightBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated {
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[self qmui_setRightBarButtonItem:item animated:animated];
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// 自动给 position 赋值
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item.qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionRight;
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}
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- (void)qmui_setRightBarButtonItems:(NSArray<UIBarButtonItem *> *)items animated:(BOOL)animated {
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[self qmui_setRightBarButtonItems:items animated:animated];
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// 自动给 position 赋值
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for (NSInteger i = 0; i < items.count; i++) {
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if (i == 0) {
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items[i].qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionRight;
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} else {
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items[i].qmui_navigationButton.buttonPosition = QMUINavigationButtonPositionNone;
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}
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}
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}
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@end
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@implementation UIViewController (QMUINavigationButton)
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+ (void)load {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// 当使用自定义返回按钮时，无法使用 VoiceOver 或者 iOS 13.4 新增的 Full Keyboard Access 返回
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OverrideImplementation([UIViewController class], @selector(accessibilityPerformEscape), ^id(__unsafe_unretained Class originClass, SEL originCMD, IMP (^originalIMPProvider)(void)) {
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return ^BOOL(UIViewController *selfObject) {
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if (selfObject.navigationItem.leftBarButtonItem.qmui_isCustomizedBackBarButtonItem
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&& ((QMUINavigationButton *)selfObject.navigationItem.leftBarButtonItem.customView).enabled
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&& selfObject.navigationController.qmui_rootViewController != selfObject
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&& selfObject.navigationController.interactivePopGestureRecognizer.enabled
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&& !UIApplication.sharedApplication.ignoringInteractionEvents) {
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[selfObject.navigationController popViewControllerAnimated:YES];
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return YES;
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}
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// call super
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BOOL (*originSelectorIMP)(id, SEL);
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originSelectorIMP = (BOOL (*)(id, SEL))originalIMPProvider();
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BOOL result = originSelectorIMP(selfObject, originCMD);
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return result;
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};
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});
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});
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}
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@end
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@implementation UINavigationBar (QMUINavigationButton)
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+ (void)load {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// 强制修改 contentView 的 directionalLayoutMargins.leading，在使用自定义返回按钮时减小 8
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// Xcode11 beta2 修改私有 view 的 directionalLayoutMargins 会 crash，换个方式
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// -[_UINavigationBarContentView directionalLayoutMargins]
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NSString *barContentViewString = [NSString qmui_stringByConcat:@"_", @"UINavigationBar", @"ContentView", nil];
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OverrideImplementation(NSClassFromString(barContentViewString), @selector(directionalLayoutMargins), ^id(__unsafe_unretained Class originClass, SEL originCMD, IMP (^originalIMPProvider)(void)) {
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return ^NSDirectionalEdgeInsets(UIView *selfObject) {
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// call super
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NSDirectionalEdgeInsets (*originSelectorIMP)(id, SEL);
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originSelectorIMP = (NSDirectionalEdgeInsets (*)(id, SEL))originalIMPProvider();
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NSDirectionalEdgeInsets originResult = originSelectorIMP(selfObject, originCMD);
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// get navbar
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UINavigationBar *navBar = nil;
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if ([NSStringFromClass([selfObject class]) isEqualToString:barContentViewString] &&
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[selfObject.superview isKindOfClass:[UINavigationBar class]]) {
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navBar = (UINavigationBar *)selfObject.superview;
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}
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// change insets
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if (navBar) {
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NSDirectionalEdgeInsets value = originResult;
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value.leading -= (navBar.qmui_customizingBackBarButtonItem ? 8 : 0);
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return value;
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}
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return originResult;
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};
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});
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// 系统的 UIBarButtonItem 响应区域比较大，如果用 customView 则响应区域只有 customView.frame 的大小，这里专门扩大它
|
// 对没用 customView 的不处理
|
OverrideImplementation([UINavigationBar class], @selector(hitTest:withEvent:), ^id(__unsafe_unretained Class originClass, SEL originCMD, IMP (^originalIMPProvider)(void)) {
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return ^UIView *(UINavigationBar *selfObject, CGPoint firstArgv, UIEvent *secondArgv) {
|
|
// call super
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UIView * (*originSelectorIMP)(id, SEL, CGPoint, UIEvent *);
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originSelectorIMP = (UIView * (*)(id, SEL, CGPoint, UIEvent *))originalIMPProvider();
|
UIView * result = originSelectorIMP(selfObject, originCMD, firstArgv, secondArgv);
|
|
BOOL hitNothing = !result || result == selfObject.qmui_contentView || [NSStringFromClass(result.class) containsString:@"StackView"];
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if (!hitNothing) return result;
|
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NSMutableArray<UIView *> *customViews = [[NSMutableArray alloc] init];
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if (selfObject.topItem.titleView) {
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[customViews addObject:selfObject.topItem.titleView];
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}
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[customViews addObjectsFromArray:[selfObject.topItem.leftBarButtonItems qmui_compactMapWithBlock:^id _Nullable(UIBarButtonItem * _Nonnull item) {
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return item.customView ?: nil;
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}]];
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[customViews addObjectsFromArray:[selfObject.topItem.rightBarButtonItems qmui_compactMapWithBlock:^id _Nullable(UIBarButtonItem * _Nonnull item) {
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return item.customView ?: nil;
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}]];
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UIView *hitTestingView = [customViews qmui_firstMatchWithBlock:^BOOL(UIView * _Nonnull item) {
|
if (!CGRectIsEmpty(item.frame) && !item.hidden && item.alpha > 0.01 && item.window) {
|
if ([item isKindOfClass:UIControl.class] && !((UIControl *)item).enabled) {
|
return NO;
|
}
|
CGRect rect = [selfObject convertRect:item.bounds fromView:item];
|
rect = CGRectInsetEdges(rect, item.qmui_outsideEdge);
|
if (CGRectContainsPoint(rect, firstArgv)) {
|
return YES;
|
}
|
}
|
return NO;
|
}];
|
if (hitTestingView) {
|
return hitTestingView;
|
}
|
return result;
|
};
|
});
|
});
|
}
|
|
- (BOOL)qmui_customizingBackBarButtonItem {
|
if (self.topItem.leftBarButtonItem) {
|
return self.topItem.leftBarButtonItem.qmui_isCustomizedBackBarButtonItem;
|
}
|
return NO;
|
}
|
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@end
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