我有一个滚动视图缩放错误的图像视图的问题

Posted 2023-03-11

【中文标题】我有一个滚动视图缩放错误的图像视图的问题

【英文标题】：I have a problem with a scrollView zooming the wrong imageView

【发布时间】：2011-03-07 04:17:50

【问题描述】：

好的，这是一个奇怪的问题，但我有两个滚动视图，每个都有一个嵌套的 imageView，以便平移和缩放图像。拖曳 scrollView/imageView 组合显示得非常好，而且因为图像比我的 scrollView 尺寸大，所以我可以平移得很好。这是我的 viewDidLoad：

-(void) viewDidLoad

// set the image to be displayed, pic your own image here

imageView = [[MyImage alloc] initWithImage: [UIImage imageNamed: @"newBackground.png"]];

// yes we want to allow user interaction

[imageView setUserInteractionEnabled:YES];

// set the instance of our myScrollView to use the main screen

scrollView = [[MyScroll alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];

// turn on scrolling

[scrollView setScrollEnabled: YES];

// set the content size to the size of the image

[scrollView setContentSize: imageView.image.size];

// add the instance of our myImageView class to the content view

[scrollView addSubview: imageView];

// flush the item

[imageView release];

// set max zoom to what suits you

[scrollView setMaximumZoomScale:1.0f];

// set min zoom to what suits you

[scrollView setMinimumZoomScale:0.25f];

// set the delegate

[scrollView setDelegate: self];

// scroll a portion of image into view (my image is very big) :)

//[scrollView scrollRectToVisible:CGRectMake(100, 100, 320, 440) animated:NO];

// yes to autoresize

scrollView.autoresizesSubviews = YES;

// set the mask

scrollView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);

// set the view

//self.view =scrollView;

[scrollView setFrame:CGRectMake(0, 0, 320, 230)];

[self.view addSubview:scrollView];


imageView1 = [[MyImage alloc] initWithImage: [UIImage imageNamed: @"newBackground.png"]];

// yes we want to allow user interaction

[imageView1 setUserInteractionEnabled:YES];

// set the instance of our myScrollView to use the main screen

scrollView1 = [[MyScroll alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];

// turn on scrolling

[scrollView1 setScrollEnabled: YES];

// set the content size to the size of the image

[scrollView1 setContentSize: imageView1.image.size];

// add the instance of our myImageView class to the content view

[scrollView1 addSubview: imageView1];

// flush the item

[imageView1 release];

// set max zoom to what suits you

[scrollView1 setMaximumZoomScale:1.0f];

// set min zoom to what suits you

[scrollView1 setMinimumZoomScale:0.25f];

// set the delegate

[scrollView1 setDelegate: self];

// scroll a portion of image into view (my image is very big) :)

//[scrollView scrollRectToVisible:CGRectMake(100, 100, 320, 440) animated:NO];

// yes to autoresize

scrollView1.autoresizesSubviews = YES;

// set the mask

scrollView1.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);

// set the view

//self.view =scrollView;

[scrollView1 setFrame:CGRectMake(0,240,320,230)];


[self.view addSubview:scrollView1];
//[[self view] addSubview:scrollView];

不至于缩放，当我捏放大第一个滚动视图/图像视图对时，它工作得很好，没有任何问题。它缩放和平移没有问题。但是当我捏缩放我的第二个滚动视图时，它会平移第二个的图像，并缩放第一个的图像。所以我的 SECOND scrollView 缩放了 FIRST 的图像。嗯？我不知道为什么会这样。

我想要的只是分离可以独立平移和缩放的查看图像。

对可能发生的事情有什么想法吗？

谢谢！

【参考方案1】：

您的viewForZoomingInScrollView: 方法可能为两个滚动视图返回相同的图像视图。它需要查看传入的是哪个滚动视图，并返回对应的图像视图。