我有一个全屏UIScrollView来显示我的图像，它使用了一些来自苹果示例代码 PhotoScroller.app 的代码。我对带有旋转的滚动视图中的图像视图和转换点的边界有点困惑。任何帮助将不胜感激！
附言。有关更多详细代码，请参阅边界中心
NSLog 在调用中将旋转到接口方向：持续时间：
2012-05-12 11:35:45.666 imageScrollView frame X and Y are 0.000000 and 0.000000
2012-05-12 11:35:45.672 imageScrollView frame Width and Height are 320.000000 and 480.000000
2012-05-12 11:35:45.677 imageScrollView bounds origin X and Y are 0.000000 and 0.000000
2012-05-12 11:35:45.682 imageScrollView bounds Width and Height are 320.000000 and 480.000000
2012-05-12 11:35:45.686 imageView frame origin X and Y are 0.000005 and 0.374437
2012-05-12 11:35:45.689 imageView frame size Width and Height are 320.000000 and 479.251129
2012-05-12 11:35:45.693 imageView bounds origin X and Y are 0.000000 and 0.000000
2012-05-12 11:35:45.697 imageView bounds size Width and Height are 641.000000 and 959.999939
2012-05-12 11:35:45.701 boundsCenter X and Y are 160.000000 and 240.000000
2012-05-12 11:35:45.705 convertPoint origin X and Y are 320.500000 and 479.999969
NSLog in call willAnimateRotationToInterfaceOrientation：duration：
2012-05-12 11:36:05.975 imageScrollView frame X and Y are 0.000000 and 0.000000
2012-05-12 11:36:05.978 imageScrollView frame Width and Height are 480.000000 and 320.000000
2012-05-12 11:36:05.983 imageScrollView bounds origin X and Y are 0.000000 and 0.000000
2012-05-12 11:36:05.987 imageScrollView bounds Width and Height are 480.000000 and 320.000000
2012-05-12 11:36:05.990 imageView frame origin X and Y are 80.000008 and 0.000017
//I am confused here. Why is the X is 80.000008, and Y is 0.000017, but not (80, -120)?
2012-05-12 11:36:05.994 imageView frame size Width and Height are 320.000000 and 479.251099
2012-05-12 11:36:06.002 imageView bounds origin X and Y are 0.000000 and 0.000000
2012-05-12 11:36:06.006 imageView bounds size Width and Height are 641.000000 and 959.999878
2012-05-12 11:36:06.009 boundsCenter X and Y are 240.000000 and 160.000000
2012-05-12 11:36:06.014 convertPoint origin X and Y are 320.500000 and 320.499969
关于自动调整大小配置：
actionSheetCoverView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
imageScrollView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
imageView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
旋转前的图像视图帧原点(NSLog in willRotateToInterfaceOrientation：duration(是(0， 0(，旋转后(NSLog in willAnimateRotationToInterfaceOrientation：duration：(，我认为应该是(80，-120(。但它是(80.000008,0.000017(;
frame 属性始终返回基于 UIView 的bounds、center和transform属性的计算值。
根据Apple的UIView文档：
如果
transform属性不是标识转换，则frame属性的值未定义，因此应忽略。
问题是您在旋转动画开始时读取 frame 属性，这意味着您的视图将具有非标识transform值，从而使其frame值毫无意义。
您可以根据另一个问题中的代码记录转换值：
NSLog(@"imageScrollView transform %@", NSStringFromCGAffineTransform(self.transform));
NSLog(@"imageView transform %@", NSStringFromCGAffineTransform(imageView.transform));
这将在旋转时显示转换属性。 如果您不熟悉身份转换，则[1, 0, 0, 1, 0, 0] .
换句话说，frame属性为您提供意外值的原因是您的视图应用了transform，从而使frame属性毫无意义。
目前尚不清楚您实际上想要实现的目标，但来自同一Apple文档的其他注释可能会有所帮助：
如果
transform属性包含非标识转换，则frame属性的值未定义，不应修改。在这种情况下，可以使用center属性重新定位视图，并改为使用bounds属性调整大小。
正如我所解释的，当你不说出你为什么感到困惑或你试图做什么时，很难帮助你。
要获取图像视图的实际中心，您可以使用以下内容：
imageView.center