Question

设计
查看层次结构如下：

UIScrollView（用于分页多张图片）
- UIScrollView（用于启用UIImageView上的缩放功能）
  - UIImageView
    - UIView（相对于UIImage中的UIImageView的来源，尺寸）
    - UIView
    - UIView ...
- UIScrollview
  - UIImageView
    - UIView
    - UIView ...
- UIScrollView ...等等

实施：

- (id)init  
{  
self = [super init];  
if (self) {  
    // Custom initialization  
    self.minimumZoomScale = 1.0f;  
    self.maximumZoomScale = 4.0f;  
    self.zoomScale = 1.0f;  
    self.bouncesZoom = true;  
    self.bounces = true;  
    self.tag = 10;  
    self.alwaysBounceHorizontal = false;  
    self.autoresizesSubviews = YES;  

    self.zoomView = [[UIImageView alloc] init];
    self.zoomView.userInteractionEnabled = YES;
    self.zoomView.autoresizesSubviews = YES;
}

return self;
}  
- (void)displayImage:(UIImage *)image  
{    
// Set the image in the view  
[_zoomView setImage:image];  

// Set the Frame size to the size of image size  
// Ex. Resulting ScrollView frame = {0,0},{1250,1500}  
// Ex. Resulting ImageView frame = {0,0}, {1250,1500}  
CGRect scrollFrame = self.frame;  
scrollFrame.size.width = image.size.width;  
scrollFrame.size.height = image.size.height;  
self.frame = scrollFrame;  

CGRect iViewFrame = _zoomView.frame;  
iViewFrame.size.width = image.size.width;  
iViewFrame.size.height = image.size.height;  
_zoomView.frame = iViewFrame;  

// Add subviews before resetting the contentsize  
for (customClass* field in list.fields) {  

    UIView* view = [[UIView alloc] initWithFrame:CGRectMake([field.x floatValue], [field.y floatValue], [field.width floatValue], [field.height floatValue])];  
    view.backgroundColor = [UIColor redColor];  
    view.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin |UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;  

    [_zoomView addSubview:view];  
}  

// Set the Frame size to the size of scrollview frame size  
// Ex. Resulting ScrollView Frame = {0,0},{320,460}  
// Ex. Resulting ImageView Frame = {0,0},{320,460}  
CGRect scrollViewFrame = self.frame;  
scrollViewFrame.size.width = 320.0f;  
scrollViewFrame.size.height = 460.0f;  
self.frame = scrollViewFrame;  

CGRect imageViewFrame = _zoomView.frame;  
imageViewFrame.size.width = self.bounds.size.width;  
imageViewFrame.size.height = self.bounds.size.height;  
_zoomView.frame = imageViewFrame;  


self.contentSize = _zoomView.bounds.size;  

[self addSubview:_zoomView];  
}

以上是我尝试实施的代码。它会将UIView添加到UIImageView内的UIScrollView。但UIView的相对来源不正确（在调整大小之前和之后）。

我是否应该采取不同的方式将UIView正确放置在UIImageView内？

Answer 1

这是谷歌“滚动视图子视图不会调整大小”的最高点。对于关注该链接的其他人：

查看你的来源，并与我的相比，我意识到在Interface Builder中，我的NIB文件有“自动大小子视图”未选中的复选框。我有一个模糊的记忆，这可能是因为在旧版本的Xcode中（这是一个已经维护了一段时间的旧项目）...... UIScrollView默认关闭它。

所以：检查你是否在Xcode / Interface Builder中正确设置了它，和/或你是在代码中设置它。

UIScrollView子视图不会调整大小

1 个答案: