我通过修改 PullToRefresh 库在 scrollViewDidScroll 中触发了 UIView 动画。我想要的是在用户开始拉动时触发动画,并在拉动以刷新标题视图离开屏幕时终止它。但是,动画仅在用户释放拉动时起作用;在用户继续拉动期间,动画不起作用......非常感谢您提前提供的帮助!:)
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if (scrollView.isDragging) {
if (refreshHeaderView.state == EGOOPullRefreshPulling && scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f && !_reloading) {
[refreshHeaderView setState:EGOOPullRefreshNormal];
if (timer) {
[timer invalidate];
timer = nil;
}
} else if (refreshHeaderView.state == EGOOPullRefreshNormal && scrollView.contentOffset.y < -65.0f && !_reloading) {
[refreshHeaderView setState:EGOOPullRefreshPulling];
if (!timer) {
timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(startMyAnimation) userInfo: nil repeats: YES];
}
}
}
}