//
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// FOREmptyView.m
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// 51offer
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//
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// Created by XcodeYang on 12/2/15.
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// Copyright © 2015 51offer. All rights reserved.
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//
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#import "FORScrollViewEmptyAssistant.h"
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#import "UIScrollView+EmptyDataSet.h"
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#import <objc/runtime.h>
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static char const * const kEmptyAssistant = "kEmptyAssistant";
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@implementation UIScrollView (FOREmptyAssistant)
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- (FORScrollViewEmptyAssistant *)assistant
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{
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return objc_getAssociatedObject(self, kEmptyAssistant);
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}
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- (void)setAssistant:(FORScrollViewEmptyAssistant *)assistant
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{
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objc_setAssociatedObject(self, kEmptyAssistant, assistant, OBJC_ASSOCIATION_RETAIN);
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}
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@end
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@interface FORScrollViewEmptyAssistant ()<DZNEmptyDataSetSource, DZNEmptyDataSetDelegate>
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@property (nonatomic, strong) FOREmptyAssistantConfiger *emptyConfiger;
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@property (nonatomic, copy) NSString *emptyBtnTitle;
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@property (nonatomic, copy) void(^emptyBtnActionBlock)();
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@end
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@implementation FORScrollViewEmptyAssistant
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{
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__weak UIScrollView *_emptyContentView;
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}
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+ (FORScrollViewEmptyAssistant *)emptyWithContentView:(UIScrollView *)contentView
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emptyConfiger:(FOREmptyAssistantConfiger *)configer;
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{
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FORScrollViewEmptyAssistant *emptyView = [[FORScrollViewEmptyAssistant alloc] initWithContentView:contentView
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configer:configer];
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return emptyView;
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}
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+ (FORScrollViewEmptyAssistant *)emptyWithContentView:(UIScrollView *)contentView
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emptyConfiger:(FOREmptyAssistantConfiger *)configer
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emptyBtnTitle:(NSString *)btnTitle
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emptyBtnActionBlock:(void(^)())btnActionBlock;
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{
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FORScrollViewEmptyAssistant *emptyView = [[FORScrollViewEmptyAssistant alloc] initWithContentView:contentView
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configer:configer];
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emptyView.emptyBtnTitle = btnTitle;
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emptyView.emptyBtnActionBlock = btnActionBlock;
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return emptyView;
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}
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+ (FORScrollViewEmptyAssistant *)emptyWithContentView:(UIScrollView *)contentView
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configerBlock:(void (^)(FOREmptyAssistantConfiger *configer))configerBlock
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{
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FOREmptyAssistantConfiger *configer = [FOREmptyAssistantConfiger new];
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!configerBlock ?: configerBlock(configer);
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FORScrollViewEmptyAssistant *emptyView = [[FORScrollViewEmptyAssistant alloc] initWithContentView:contentView
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configer:configer];
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return emptyView;
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}
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+ (FORScrollViewEmptyAssistant *)emptyWithContentView:(UIScrollView *)contentView
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configerBlock:(void (^)(FOREmptyAssistantConfiger *configer))configerBlock
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emptyBtnTitle:(NSString *)btnTitle
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emptyBtnActionBlock:(void(^)())btnActionBlock
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{
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FOREmptyAssistantConfiger *configer = [FOREmptyAssistantConfiger new];
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!configerBlock ?: configerBlock(configer);
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FORScrollViewEmptyAssistant *emptyView = [[FORScrollViewEmptyAssistant alloc] initWithContentView:contentView
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configer:configer];
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emptyView.emptyBtnTitle = btnTitle;
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emptyView.emptyBtnActionBlock = btnActionBlock;
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return emptyView;
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}
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- (id)initWithContentView:(UIScrollView *)contentView configer:(FOREmptyAssistantConfiger *)configer
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{
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self = [super init];
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if (self) {
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_emptyContentView = contentView;
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_emptyConfiger = configer;
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_emptyContentView.emptyDataSetSource = self;
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_emptyContentView.emptyDataSetDelegate = self;
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// check the scrollView's category 查看上面类目方法
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// catch the assistant in this way 持有对象，防止crash
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_emptyContentView.assistant = self;
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}
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return self;
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}
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#pragma mark - set
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- (FOREmptyAssistantConfiger *)emptyConfiger {
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return _emptyConfiger ?: [FOREmptyAssistantConfiger new];
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}
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- (NSString *)emptyBtnTitle
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{
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return _emptyBtnTitle ?: @"";
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}
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#pragma mark - DZNEmptyDataSetSource
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- (NSAttributedString *)titleForEmptyDataSet:(UIScrollView *)scrollView
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{
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NSDictionary *attributes = @{NSFontAttributeName: self.emptyConfiger.emptyTitleFont,
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NSForegroundColorAttributeName: self.emptyConfiger.emptyTitleColor};
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return [[NSAttributedString alloc] initWithString:self.emptyConfiger.emptyTitle
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attributes:attributes];
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}
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- (NSAttributedString *)descriptionForEmptyDataSet:(UIScrollView *)scrollView
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{
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NSMutableParagraphStyle *paragraph = [NSMutableParagraphStyle new];
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paragraph.lineBreakMode = NSLineBreakByWordWrapping;
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paragraph.alignment = NSTextAlignmentCenter;
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NSDictionary *attributes = @{NSFontAttributeName: self.emptyConfiger.emptySubtitleFont,
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NSForegroundColorAttributeName: self.emptyConfiger.emptySubtitleColor,
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NSParagraphStyleAttributeName: paragraph};
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return [[NSAttributedString alloc] initWithString:self.emptyConfiger.emptySubtitle attributes:attributes];
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}
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- (UIImage *)imageForEmptyDataSet:(UIScrollView *)scrollView
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{
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return self.emptyConfiger.emptyImage;
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}
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- (NSAttributedString *)buttonTitleForEmptyDataSet:(UIScrollView *)scrollView forState:(UIControlState)state
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{
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NSDictionary *attributes = @{NSFontAttributeName: self.emptyConfiger.emptyBtntitleFont,
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NSForegroundColorAttributeName: self.emptyConfiger.emptyBtntitleColor};
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return [[NSAttributedString alloc] initWithString:self.emptyBtnTitle attributes:attributes];
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}
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- (UIImage *)buttonBackgroundImageForEmptyDataSet:(UIScrollView *)scrollView forState:(UIControlState)state
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{
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return self.emptyConfiger.emptyBtnImage;
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}
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- (UIColor *)backgroundColorForEmptyDataSet:(UIScrollView *)scrollView
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{
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return [UIColor clearColor];
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}
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- (BOOL)emptyDataSetShouldAllowScroll:(UIScrollView *)scrollView
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{
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return self.emptyConfiger.allowScroll;
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}
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- (BOOL)emptyDataSetShouldDisplay:(UIScrollView *)scrollView
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{
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return self.emptyConfiger.shouldDisplay ? self.emptyConfiger.shouldDisplay() : YES;
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}
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- (CGPoint)offsetForEmptyDataSet:(UIScrollView *)scrollView
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{
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return self.emptyConfiger.emptyCenterOffset;
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}
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- (CGFloat)spaceHeightForEmptyDataSet:(UIScrollView *)scrollView
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{
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return self.emptyConfiger.emptySpaceHeight;
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}
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#pragma mark - DZNEmptyDataSetDelegate
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- (void)emptyDataSetDidTapButton:(UIScrollView *)scrollView
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{
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!self.emptyBtnActionBlock ?: self.emptyBtnActionBlock();
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}
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@end
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