UIScrollView

        UIScrollView  scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(10, 20, 300, 130)];
        scrollView.backgroundColor = [UIColor redColor];
        // 取消弹簧效果
        scrollView.bounces = NO;
        // 取消滚动条
        scrollView.showsHorizontalScrollIndicator = NO;
        scrollView.showsVerticalScrollIndicator = NO;
        // 要分页
        scrollView.pagingEnabled = YES;
        // contentSize
        scrollView.contentSize = CGSizeMake(kImageCount * _scrollView.bounds.size.width, 0);
        // 设置代理
        scrollView.delegate = self;