//发帖按钮
@property (nonatomic, strong) UIButton *postButton;
- (void)prepareHomePostButton {
[self.view addSubview:self.postButton];
[self.postButton setFrame:CGRectMake(self.view.width - 50 - 15, self.view.height - 50 - 30 - [BMUtils tabbarBarHeight], 50, 50)];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
if (scrollView.dragging) {
//手势触发的滚动则隐藏发帖按钮
[self postButtonAnimationWithHidden:YES];
}
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
[self postButtonAnimationWithHidden:NO];
}
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
[self postButtonAnimationWithHidden:NO];
}
- (void)postButtonAnimationWithHidden:(BOOL)hidden {
self.stopScrollTime = [[NSDate date] timeIntervalSince1970];
BMWeakSelf
if (!hidden) {
CGFloat time = 0.7;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(time * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSTimeInterval nowTime = [[NSDate date] timeIntervalSince1970];
if (nowTime - weakSelf.stopScrollTime >= time) {
[UIView animateWithDuration:0.3 animations:^{
weakSelf.postButton.alpha = 1.0;
}];
}
});
}
else {
if (self.postButton.alpha < 0.01) {
return;
}
[UIView animateWithDuration:0.3 animations:^{
weakSelf.postButton.alpha = 0.0;
}];
}
}
