如何获取 UINavigationController 中使用的 UIView 原点的 x/y 坐标？
如何获取 UINavigationController 中使用的 UIView 原点的 x/y 坐标？
也就是说，我有一个 UINavigationController iPhone 应用程序设置。我将一个新视图（称为 CustomUIView）推送到堆栈上。如何确定 CustomView 视图相对于整个 iPhone 屏幕的绝对原点（x/y 坐标）？也就是说，所以它不应该是 0,0，因为它应该考虑顶部的导航栏等。
我注意到我得到： * 对于 NavController：frame = (0 0; 320 480) * 对于customViewController.view：frame = (0 0; 320 416) * 对于customView本身：frame = (0 0; 320 396)
所以问题是，当我在customView代码本身中，并且我得到它的框架时，它给了我0,0作为原点...
背景：I正在尝试将图像定位在customView上某个位置的中心，但它似乎是偏移的，我猜测是因为当我尝试设置它相对于customView的位置时，也许我应该将其设置为相对于这NavController整体框架。我想要图像居中的位置是基于在屏幕上获取触摸事件：
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches){
[self dispatchTouchEvent:[touch locationInView:self]];
}
}
PS。也许另一个有用的答案是，如果您确实从 UITouch 事件中获取坐标，然后想要使用它来使图像在这些坐标上居中，那么您将在基于 UINavigationController 的 iPhone 中的 UIview 子视图中使用的代码是什么应用程序，这将使图像正确居中......
how do I get the x/y co-ordinates of a UIView origin used within a UINavigationController?
That is I have a UINavigationController iPhone app setup. I push a new view, call it CustomUIView, onto the stack. How can I can the absolute origin (x/y cooridnate) of the CustomView's view, relatieve to the overall iPhone screen? That is, so it shouldn't be 0,0 because it should take into account the navigationbar at the top etc.
I note that I get:
* for NavController: frame = (0 0; 320 480)
* for customViewController.view: frame = (0 0; 320 416)
* for customView itself: frame = (0 0; 320 396)
So like the trouble is, when I'm in the customView code itself, and I get it's frame, it gives me 0,0 for origin...
Background: I'm trying to position an image centered at a location on the customView, but it seems to be offset, and I'm guessing because when I'm trying to set it's position relative to the customView, perhaps I should be setting it relative to the NavController overall frame. The position I want the image centered at is based on getting a touch event on the screen:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches){
[self dispatchTouchEvent:[touch locationInView:self]];
}
}
PS. Perhaps another helpful answer would be, if you do get co-ordinates from a UITouch event, then want to use this to center an image on these coordinates, what would be the code you would use within a UIview subview, within a UINavigationController based iPhone app, that would center the image properly....
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CGPoint ConvertPoint = [self.view.superview ConvertPoint:self.view.frame.origin toView:nil];请参阅convertPoint:toView的文档：
http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UIView_Class/UIView/UIView.html#//apple_ref/occ/instm/UIView/convertPoint:toView：
CGPoint convertedPoint = [self.view.superview convertPoint:self.view.frame.origin toView:nil];See the documentation for convertPoint:toView:
http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UIView_Class/UIView/UIView.html#//apple_ref/occ/instm/UIView/convertPoint:toView: