//
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// MJRefreshBackNormalFooter.m
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// MJRefresh
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//
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// Created by MJ Lee on 15/4/24.
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// Copyright (c) 2015年 小码哥. All rights reserved.
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//
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#import "MJRefreshBackNormalFooter.h"
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#import "NSBundle+MJRefresh.h"
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#import "UIView+MJExtension.h"
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@interface MJRefreshBackNormalFooter()
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{
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__unsafe_unretained UIImageView *_arrowView;
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}
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@property (weak, nonatomic) UIActivityIndicatorView *loadingView;
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@end
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@implementation MJRefreshBackNormalFooter
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#pragma mark - 懒加载子控件
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- (UIImageView *)arrowView
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{
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if (!_arrowView) {
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UIImageView *arrowView = [[UIImageView alloc] initWithImage:[NSBundle mj_arrowImage]];
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[self addSubview:_arrowView = arrowView];
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}
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return _arrowView;
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}
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- (UIActivityIndicatorView *)loadingView
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{
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if (!_loadingView) {
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UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:_activityIndicatorViewStyle];
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loadingView.hidesWhenStopped = YES;
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[self addSubview:_loadingView = loadingView];
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}
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return _loadingView;
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}
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- (void)setActivityIndicatorViewStyle:(UIActivityIndicatorViewStyle)activityIndicatorViewStyle
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{
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_activityIndicatorViewStyle = activityIndicatorViewStyle;
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[self.loadingView removeFromSuperview];
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self.loadingView = nil;
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[self setNeedsLayout];
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}
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#pragma mark - 重写父类的方法
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- (void)prepare
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{
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[super prepare];
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#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
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if (@available(iOS 13.0, *)) {
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_activityIndicatorViewStyle = UIActivityIndicatorViewStyleMedium;
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return;
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}
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#endif
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_activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
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}
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- (void)placeSubviews
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{
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[super placeSubviews];
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// 箭头的中心点
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CGFloat arrowCenterX = self.mj_w * 0.5;
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if (!self.stateLabel.hidden) {
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arrowCenterX -= self.labelLeftInset + self.stateLabel.mj_textWidth * 0.5;
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}
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CGFloat arrowCenterY = self.mj_h * 0.5;
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CGPoint arrowCenter = CGPointMake(arrowCenterX, arrowCenterY);
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// 箭头
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if (self.arrowView.constraints.count == 0) {
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self.arrowView.mj_size = self.arrowView.image.size;
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self.arrowView.center = arrowCenter;
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}
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// 圈圈
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if (self.loadingView.constraints.count == 0) {
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self.loadingView.center = arrowCenter;
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}
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self.arrowView.tintColor = self.stateLabel.textColor;
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}
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- (void)setState:(MJRefreshState)state
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{
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MJRefreshCheckState
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// 根据状态做事情
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if (state == MJRefreshStateIdle) {
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if (oldState == MJRefreshStateRefreshing) {
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self.arrowView.transform = CGAffineTransformMakeRotation(0.000001 - M_PI);
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[UIView animateWithDuration:self.slowAnimationDuration animations:^{
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self.loadingView.alpha = 0.0;
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} completion:^(BOOL finished) {
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// 防止动画结束后，状态已经不是MJRefreshStateIdle
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if (self.state != MJRefreshStateIdle) return;
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self.loadingView.alpha = 1.0;
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[self.loadingView stopAnimating];
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self.arrowView.hidden = NO;
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}];
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} else {
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self.arrowView.hidden = NO;
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[self.loadingView stopAnimating];
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[UIView animateWithDuration:self.fastAnimationDuration animations:^{
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self.arrowView.transform = CGAffineTransformMakeRotation(0.000001 - M_PI);
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}];
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}
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} else if (state == MJRefreshStatePulling) {
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self.arrowView.hidden = NO;
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[self.loadingView stopAnimating];
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[UIView animateWithDuration:self.fastAnimationDuration animations:^{
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self.arrowView.transform = CGAffineTransformIdentity;
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}];
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} else if (state == MJRefreshStateRefreshing) {
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self.arrowView.hidden = YES;
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[self.loadingView startAnimating];
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} else if (state == MJRefreshStateNoMoreData) {
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self.arrowView.hidden = YES;
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[self.loadingView stopAnimating];
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}
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}
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@end
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