IOS学习 scrollView的代理

- (void)initViewController

{    

    //设置scrollview

    _scrollView = [[UIScrollViewalloc]initWithFrame:CGRectMake(0,20,VIEW_WIDTH ,261)];  //屏幕宽度

//    scrollView.backgroundColor = [UIColor redColor];

    

    [self.viewaddSubview:_scrollView];

    //设置内容大小

    _scrollView.contentSize =CGSizeMake(VIEW_WIDTH,VIEW_HEIGHT*10);

    

    _scrollView.pagingEnabled =YES;  //分页效果

    

    //设置图片

    for (int i =0; i<kIMGCOUNT; i++)

    {

        imageView = [[UIImageViewalloc]initWithFrame:CGRectMake(self.view.frame.size.width*i,0,self.view.frame.size.width,261)];

        //设置图片

        NSString *name = [NSStringstringWithFormat:@"background%d",i+1];

        imageView.tag = i;

        imageView.image=[UIImageimageNamed:name];

        [_scrollViewaddSubview:imageView];

    }

  

    //设置代理

    _scrollView.delegate=self;

   

    UILabel *label = [[UILabelalloc]initWithFrame:CGRectMake(VIEW_WIDTH,210,VIEW_WIDTH,40)];

    label.text =@"学习scrollView";

    label.backgroundColor = [UIColoryellowColor];

    [_scrollView addSubview:label];

    

}

/*

 // 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

 {

 

 }

 */

// 是否支持滑动至顶部  代理的方法

- (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");

}