//
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// MJRefreshGifHeader.m
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// MJRefreshExample
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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 "MJRefreshGifHeader.h"
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@interface MJRefreshGifHeader()
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{
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__unsafe_unretained UIImageView *_gifView;
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}
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/** 所有状态对应的动画图片 */
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@property (strong, nonatomic) NSMutableDictionary *stateImages;
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/** 所有状态对应的动画时间 */
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@property (strong, nonatomic) NSMutableDictionary *stateDurations;
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@end
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@implementation MJRefreshGifHeader
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#pragma mark - 懒加载
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- (UIImageView *)gifView
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{
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if (!_gifView) {
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UIImageView *gifView = [[UIImageView alloc] init];
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[self addSubview:_gifView = gifView];
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}
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return _gifView;
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}
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- (NSMutableDictionary *)stateImages
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{
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if (!_stateImages) {
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self.stateImages = [NSMutableDictionary dictionary];
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}
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return _stateImages;
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}
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- (NSMutableDictionary *)stateDurations
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{
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if (!_stateDurations) {
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self.stateDurations = [NSMutableDictionary dictionary];
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}
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return _stateDurations;
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}
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#pragma mark - 公共方法
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- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state
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{
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if (images == nil) return;
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self.stateImages[@(state)] = images;
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self.stateDurations[@(state)] = @(duration);
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/* 根据图片设置控件的高度 */
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UIImage *image = [images firstObject];
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if (image.size.height > self.mj_h) {
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self.mj_h = image.size.height;
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}
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}
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- (void)setImages:(NSArray *)images forState:(MJRefreshState)state
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{
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[self setImages:images duration:images.count * 0.1 forState:state];
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}
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#pragma mark - 实现父类的方法
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- (void)prepare
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{
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[super prepare];
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// 初始化间距
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self.labelLeftInset = 20;
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}
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- (void)setPullingPercent:(CGFloat)pullingPercent
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{
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[super setPullingPercent:pullingPercent];
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NSArray *images = self.stateImages[@(MJRefreshStateIdle)];
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if (self.state != MJRefreshStateIdle || images.count == 0) return;
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// 停止动画
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[self.gifView stopAnimating];
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// 设置当前需要显示的图片
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NSUInteger index = images.count * pullingPercent;
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if (index >= images.count) index = images.count - 1;
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self.gifView.image = images[index];
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}
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- (void)placeSubviews
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{
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[super placeSubviews];
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if (self.gifView.constraints.count) return;
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self.gifView.frame = self.bounds;
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if (self.stateLabel.hidden && self.lastUpdatedTimeLabel.hidden) {
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self.gifView.contentMode = UIViewContentModeCenter;
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} else {
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self.gifView.contentMode = UIViewContentModeRight;
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CGFloat stateWidth = self.stateLabel.mj_textWith;
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CGFloat timeWidth = 0.0;
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if (!self.lastUpdatedTimeLabel.hidden) {
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timeWidth = self.lastUpdatedTimeLabel.mj_textWith;
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}
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CGFloat textWidth = MAX(stateWidth, timeWidth);
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self.gifView.mj_w = self.mj_w * 0.5 - textWidth * 0.5 - self.labelLeftInset;
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}
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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 == MJRefreshStatePulling || state == MJRefreshStateRefreshing) {
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NSArray *images = self.stateImages[@(state)];
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if (images.count == 0) return;
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[self.gifView stopAnimating];
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if (images.count == 1) { // 单张图片
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self.gifView.image = [images lastObject];
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} else { // 多张图片
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self.gifView.animationImages = images;
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self.gifView.animationDuration = [self.stateDurations[@(state)] doubleValue];
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[self.gifView startAnimating];
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}
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} else if (state == MJRefreshStateIdle) {
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[self.gifView stopAnimating];
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}
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}
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@end
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