关于UIScrollerView的基本用法和代理

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- (void)viewDidLoad

{   [super viewDidLoad];

    scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];

   scrollView.backgroundColor = [UIColor redColor];

  // 是否支持滑动最顶端 // scrollView.scrollsToTop = NO;

  scrollView.delegate = self;

  // 设置内容大小

  scrollView.contentSize = CGSizeMake(320, 460*10);

  // 是否反弹 // scrollView.bounces = NO;

  // 是否分页 // scrollView.pagingEnabled = YES;

  // 是否滚动 // scrollView.scrollEnabled = NO;  

   // scrollView.showsHorizontalScrollIndicator = NO;

   // 设置indicator风格

  // scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;

  // 设置内容的边缘和Indicators边缘

  // scrollView.contentInset = UIEdgeInsetsMake(0, 50, 50, 0);

  // scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 50, 0, 0);

  // 提示用户,Indicators flash [scrollView flashScrollIndicators];

   // 是否同时运动,lock

  scrollView.directionalLockEnabled = YES;

  [self.view addSubview:scrollView];

   UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 200, 320, 40)];

  label.backgroundColor = [UIColor yellowColor]; label.text = @"学习scrolleview";

  [scrollView addSubview:label];

   }

#pragma mark -- delegate 

   // 返回一个放大或者缩小的视图

   - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { }

  // 开始放大或者缩小 - (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView: (UIView *)view { }

  // 缩放结束时 - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale { }

  // 视图已经放大或缩小 - (void)scrollViewDidZoom:(UIScrollView *)scrollView { NSLog(@"scrollViewDidScrollToTop"); } */

  // 是否支持滑动至顶部 - (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView { return YES; }

  // 滑动到顶部时调用该方法 - (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView { NSLog(@"scrollViewDidScrollToTop"); }

    // scrollView 已经滑动 - (void)scrollViewDidScroll:(UIScrollView *)scrollView { NSLog(@"scrollViewDidScroll"); }

  // scrollView 开始拖动 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { NSLog(@"scrollViewWillBeginDragging"); }

  // scrollView 结束拖动 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate { NSLog(@"scrollViewDidEndDragging"); }

  // scrollView 开始减速(以下两个方法注意与以上两个方法加以区别)

  - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView { NSLog(@"scrollViewWillBeginDecelerating"); }

  // scrollview 减速停止 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { NSLog(@"scrollViewDidEndDecelerating"); }

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