1.创建一个滚动视图（在内容的展示上，类似于浏览器）
UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(,,,)];
2.设置可展示内容的size
sv.contentSize = CGSizeMake(,);
3.设置弹簧效果
sv.bounces = NO;
4.设置翻页效果
sv.pagintEnabled = YES;
5.设置水平和垂直进度条是否展示
sv.showsHorizontalScrollIndicator = YES;
sv.showsVerticaScrollIndicator = NO;
//如果将垂直设为NO，那么水平进度条也就不会显示了
6.是否允许用户操作sv的滚动
sv.scrollEnabled = NO;
7.- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
sv.contentOffset = CGPointMake(,);//设置偏移量（通过代码设置sv展示的区域）
[sv setContentOffset:CGPointMake(,) animate:YES];//加动画设置偏移量
}
8.设置允许sv里的子视图缩放的倍数
sv.minimumZoomScale = 0.5;
sv.maximumZoomScale = 2;
9.告诉sv，允许缩放哪一个子视图
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return [scrollView.subviews lastObject];
}
10.当sv被滚动的时候调用
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
NSLog(@"===%@",NSStringFromCGPoint(scrollView.contentOffset));
//将偏移量转化成字符串，然后打印
}
11.- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
NSLog(@"开始拖拽");
}
12.- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
NSLog(@"结束拖拽");
}
13.- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
NSLog(@"开始滑行");
}
14.- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
NSLog(@"结束滑行");//最常用
}
15.关掉vc对sv的自动调整
self.automaticallyAdjustsScrollViewInsets = NO;