UIScrollView监听静止的数种情况

1.直接通过block

-(void)testInBlock
{
//通过block监听
[UIView animateWithDuration:1.0 animations:^{
self.scrollView.contentOffset = CGPointMake(50, 20);
} completion:^(BOOL finished) {
NSLog(@"滚动完毕");
}];
}

2.代理中的

scrollViewDidEndScrollingAnimation:

方法

触发条件：使用setContentOffset:animated:或者scrollRectToVisible:animated:方法让scrollView产生滚动动画

-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
NSLog(@"静止-[使用setContentOffset:animated:或者scrollRectToVisible:animated:方法让scrollView产生滚动动画, 最后静止]");
}

3.代理中的

scrollViewDidEndDecelerating:

方法

触发条件：人为拖拽scrollView产生滚动动画(手松开以后由于惯性会继续滚动)

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
NSLog(@"静止-[手松开以后由于惯性继续滚动, 最后静止]");
}

4.代理中的

scrollViewDidEndDragging: willDecelerate:

方法

decelerate为YES : 手松开后会由于惯性继续滚动；NO : 手松开后立即静止

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
if (decelerate) {
NSLog(@"手松开后由于惯性继续滚动");
} else { // 手松开后立即静止
NSLog(@"静止-[手松开后立即静止]");
[self afterIdle];
}
}