CGAffineTransformMakeRotation 拉伸了我的图像，我做错了什么？
我有一张图像显示地图上哪条路是北。如果发现新标题，则 CoreLocation 会更新此图像。它也被放置在正确的位置，我使用以下代码：
locateMeView.transform = CGAffineTransformMakeRotation(([CoreLocationController sharedInstance].heading - 45) * M_PI / 180);
CGRect frame = locateMeView.frame;
CGPoint pos = [MapClass vectorForLocation:[CoreLocationController sharedInstance].location mapCenter:curLocation zoom:curZoom];
frame.origin.x = (int)(self.view.bounds.size.width/2 + pos.x - frame.size.width / 2);
frame.origin.y = (int)(self.view.bounds.size.height/2 + pos.y - frame.size.height / 2);
frame.size.width = 24;
frame.size.height = 24;
locateMeView.frame = frame;
CoreLocationController 是一个存储正常 CoreLocation 更新的类。 MapClass 将地图上的 lat/lng 坐标转换为 x/y 坐标。图像的位置是正确的，但旋转会造成奇怪的效果。对于 0 en M_PI，图像是正确的，但在这些图像之间图像被拉伸，就好像它也绕 z 轴旋转一样，并且在 M_PI/2 和 3 * M_PI/2 处，它完全消失。有人可以解释发生了什么以及我做错了什么吗？
I have an image which shows which way is north on a map. This image is updated by CoreLocation if a new heading is found. It is also placed at the correct position, I use the following code:
locateMeView.transform = CGAffineTransformMakeRotation(([CoreLocationController sharedInstance].heading - 45) * M_PI / 180);
CGRect frame = locateMeView.frame;
CGPoint pos = [MapClass vectorForLocation:[CoreLocationController sharedInstance].location mapCenter:curLocation zoom:curZoom];
frame.origin.x = (int)(self.view.bounds.size.width/2 + pos.x - frame.size.width / 2);
frame.origin.y = (int)(self.view.bounds.size.height/2 + pos.y - frame.size.height / 2);
frame.size.width = 24;
frame.size.height = 24;
locateMeView.frame = frame;
CoreLocationController is a class which stores the updates of the normal CoreLocation. The MapClass transforms lat/lng coordinates to x/y coordinates on my map. The position of the image is correct, but the rotation is causing strange effects. For 0 en M_PI the image is correct but between these the image is stretched as if it is also rotated around the z-axis and at M_PI/2 and 3 * M_PI/2, it disappears altogether. Can someone explain what is happening and what I am doing wrong?
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我发现出了什么问题（或多或少）。当使用变换属性时，您不允许（无论出于何种原因）通过更改框架来更改位置，您必须使用中心属性。所以最后的代码是：
希望有同样问题的人能找到我的答案。
I found out what was wrong (more or less anyway). When using the transform property you are not allowed (for whatever reason) to change the position by changing the frame, you have to use the center property. So the code in the end was:
Hope that someone with the same problem will find my answer.
另一个解决方案：
在您的情况下，它应该是：
Another solution:
In your situation it should be:
尝试在调整大小后设置变换？顺序对于转换很重要。
Try setting the transform after the resizing? Order can matter with transforms.