判断UIScrollView 是否停止滚动

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
    if(decelerate == NO) {
        [self scrollViewDidEndDecelerating:scrollView];
    }
}

- (void)scrollViewDidEndDecelerating:(nonnull UIScrollView *)scrollView {
    // 在这里面写scrollView停止时需要做的事情
    NSLog(@"UIScrollView停止滚动了");
}