---

以collectionView為例

<UIScrollViewDelegate >

@property (nonatomic, assign) NSInteger lastcontentOffset; //添加此屬性的作用，依據差值，判別ScrollView是上滑還是下拉

  self.collectionView.delegate = self;

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    CGFloat hight = scrollView.frame.size.height;
    CGFloat contentOffset = scrollView.contentOffset.y;
    CGFloat distanceFromBottom = scrollView.contentSize.height - contentOffset;
    CGFloat offset = contentOffset - self.lastcontentOffset;
    self.lastcontentOffset = contentOffset;

    if (offset > 0 && contentOffset > 0) {
       NSLog(@"上拉行為");
    }
    if (offset < 0 && distanceFromBottom > hight) {
        NSLog(@"下拉行為");
    }
    if (contentOffset == 0) {
        NSLog(@"滑動到頂部");
    }
    if (distanceFromBottom < hight) {
          NSLog(@"滑動究竟部");
    }

}

【iOS開發:判別UIScrollView是上拉還是下拉】的相關資料介紹到這裡，希望對您有所幫助！ 提示：不會對讀者因本文所帶來的任何損失負責。如果您支持就請把本站添加至收藏夾哦！