Iphone 使用多个图像缩放UIScrollView

我有一个包含多个UIImageView的UIScrollFrame

在这种控件中支持缩放的正确方法是什么

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“viewForZoomingInScrollView”应该返回哪个视图？

苹果公司有一段非常好的示例代码，它完全是关于UIScrollView以及缩放和平铺的。查看

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此代码将在WWDC2009的Scoll Views会话中讨论。不幸的是，该会话的视频无法免费获得，但您可以将其作为iPhone WWDC2009视频包的一部分购买。

我最终通过在scrollview中添加scrollview来实现它。

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这样，内部视图处理页面滑动，而外部视图处理缩放。

只需将滚动视图放在另一个视图中即可

就像这样：

    -(void)zoomToSelectedImage:(NSIndexPath *)indexPath
    {

      int currentPage = indexPath.row;

    //The External Scrollview. It move back and forward
      UIScrollView *contentViewZoom = [[UIScrollView alloc] initWithFrame:self.frame];
      [contentViewZoom setBackgroundColor:[UIColor colorWithWhite:0.0 alpha:0.8]];
      [contentViewZoom setContentSize:CGSizeMake(contentViewZoom.frame.size.width * [arrayOfImages count], contentViewZoom.frame.size.height)];
      [contentViewZoom setPagingEnabled:YES];
      [contentViewZoom setDelegate:self];


      for (int i = 0; i < [arrayOfImages count]; i++) {
        CGRect frame;
        frame.origin.x = contentViewZoom.frame.size.width * i;
        frame.origin.y = 0;
        frame.size = contentViewZoom.frame.size;

        //The Internal Scrollview. It allow you zoom the picture

        UIScrollView *imageScrollView = [[UIScrollView alloc]initWithFrame:frame];
        [imageScrollView setTag:1];
        [imageScrollView setMinimumZoomScale:1.0];
        [imageScrollView setMaximumZoomScale:3.0];
        [imageScrollView setAlpha:1];
        [imageScrollView setDelegate:self];
        [imageScrollView setBouncesZoom:YES];
        [imageScrollView setClipsToBounds:YES];
        [imageScrollView setShowsHorizontalScrollIndicator:NO];
        [imageScrollView setShowsVerticalScrollIndicator:NO];
        [imageScrollView setContentSize:CGSizeMake(768, 1024)];


        UIImage *image = [arrayOfImages objectAtIndex:i];
        UIImageView* imgView = [[UIImageView alloc] init];
        [imgView setImage:image];
        [imgView setFrame:CGRectMake(0, 0, 768, 1024)];
        imgView.bounds = self.bounds;
        [imgView setClipsToBounds:YES];
        [imgView setContentMode:UIViewContentModeScaleAspectFit];
        [imgView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

        [imageScrollView addSubview:imgView];
        [contentViewZoom addSubview:imageScrollView];

      }


      [self addSubview:contentViewZoom];  
      [contentViewZoom setAlpha:0.2];


      //Positioning according to current position
      CGRect frame;
      frame.origin.x = contentViewZoom.frame.size.width * currentPage;
      frame.origin.y = 0;
      frame.size = contentViewZoom.frame.size;
      [contentViewZoom scrollRectToVisible:frame animated:NO];

    }

-（void）ZoomToSelecteImage:（NSIndexPath*）indexPath
{
int currentPage=indexPath.row；
//外部滚动视图。它可以前后移动
UIScrollView*contentViewZoom=[[UIScrollView alloc]initWithFrame:self.frame]；
[contentViewZoom setBackgroundColor:[UIColor-WithWhite:0.0 alpha:0.8]；
[contentViewZoom设置ContentSize:CGSizeMake（contentViewZoom.frame.size.width*[arrayOfImages count]，contentViewZoom.frame.size.height）]；
[contentViewZoom SetPaginEnabled:是]；
[contentViewZoom setDelegate:self]；
对于（int i=0；i<[arrayOfImages count]；i++）{
CGRect帧；
frame.origin.x=contentViewZoom.frame.size.width*i；
frame.origin.y=0；
frame.size=contentViewZoom.frame.size；
//内部滚动视图。它允许您缩放图片
UIScrollView*imageScrollView=[[UIScrollView alloc]initWithFrame:frame]；
[imageScrollView设置标签：1]；
[imageScrollView设置最小缩放比例：1.0]；
[imageScrollView设置最大缩放比例：3.0]；
[imageScrollView设置Alpha:1]；
[imageScrollView setDelegate:self]；
[imageScrollView setBouncesZoom:是]；
[imageScrollView setClipsToBounds:是]；
[imageScrollView设置ShowShorizontalScrollIndicator:否]；
[图像滚动视图设置显示垂直滚动指示器：否]；
[imageScrollView setContentSize:CGSizeMake（7681024）]；
UIImage*image=[arrayOfImages对象索引：i]；
UIImageView*imgView=[[UIImageView alloc]init]；
[imgView设置图像：图像]；
[imgView设置帧：CGRectMake（0,07681024）]；
imgView.bounds=self.bounds；
[imgView setClipsToBounds:是]；
[imgView setContentMode:UIViewContentModeScaleAspectFit]；
[imgView setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight]；
[imageScrollView添加子视图：imgView]；
[内容视图缩放添加子视图：图像滚动视图]；
}
[自添加子视图：contentViewZoom]；
[contentViewZoom setAlpha:0.2]；
//根据当前位置定位
CGRect帧；
frame.origin.x=contentViewZoom.frame.size.width*currentPage；
frame.origin.y=0；
frame.size=contentViewZoom.frame.size；
[contentViewZoom scrollRectToVisible:帧动画：否]；
}

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备注：在我的情况下，屏幕大小是固定的（768x1024），您应该根据需要进行更改。

Thank-我们将查看一下。之前错过了它，因为这是文档中唯一一个下载不起作用的示例。。。