ios 如何在另一个视图中获取视图的框架？
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How to get the frame of a view inside another view?
提问by cyclingIsBetter
I have an UIImageViewin the self.view(the main View) and inside it there is a UIButton. I want to know what's the frame of UIButtonin self.viewnot in UIImageView.
我UIImageView在self.view（主视图）中有一个，里面有一个UIButton. 我想知道UIButtonin self.viewnot in的框架是什么UIImageView。
回答by beryllium
I guess you are looking for this method
我猜你正在寻找这种方法
// Swift
let frame = imageView.convert(button.frame, to: self.view)
// Objective-C
CGRect frame = [imageView convertRect:button.frame toView:self.view];
回答by jbat100
There are four UIViewmethods which can help you, converting CGPointsand CGRectsfrom one UIViewcoordinate reference to another:
有四种UIView方法可以帮助您，将一个坐标参考转换CGPoints并CGRects从一个UIView坐标参考转换为另一个：
– convertPoint:toView:
– convertPoint:fromView:
– convertRect:toView:
– convertRect:fromView:
so you can try
所以你可以试试
CGRect f = [imageView convertRect:button.frame toView:self.view];
or
或者
CGRect f = [self.view convertRect:button.frame fromView:imageView];
回答by Derek Soike
Swift 3
斯威夫特 3
You can convert the button's frame to the view's coordinate system with this:
您可以使用以下命令将按钮的框架转换为视图的坐标系：
self.view.convert(myButton.frame, from: myButton.superview)
self.view.convert(myButton.frame, from: myButton.superview)
Make sure to put your logic inside viewDidLayoutSubviewsand not viewDidLoad. Geometry related operations should be performed after subviews are laid out, otherwise they may not work properly.
确保把你的逻辑放在里面viewDidLayoutSubviews而不是viewDidLoad. 布局子视图后应进行几何相关操作，否则可能无法正常工作。
class ViewController: UIViewController {
@IBOutlet weak var myImageView: UIImageView!
@IBOutlet weak var myButton: UIButton!
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let buttonFrame = self.view.convert(myButton.frame, from: myButton.superview)
}
}
You can just reference myButton.superviewinstead of myImageViewwhen converting the frame.
您可以在转换帧时只引用myButton.superview而不是引用myImageView。
Here are more options for converting a CGPointor CGRect.
这里有更多用于转换 aCGPoint或 的选项CGRect。
self.view.convert(point: CGPoint, from: UICoordinateSpace)
self.view.convert(point: CGPoint, from: UIView)
self.view.convert(rect: CGRect, from: UICoordinateSpace)
self.view.convert(rect: CGRect, from: UIView)
self.view.convert(point: CGPoint, to: UICoordinateSpace)
self.view.convert(point: CGPoint, to: UIView)
self.view.convert(rect: CGRect, to: UICoordinateSpace)
self.view.convert(rect: CGRect, to: UIView)
See the Apple Developer Docsfor more on converting a CGPointor CGRect.
见苹果开发者文档的转换更多的CGPoint还是CGRect。
回答by Rasmus Styrk
Something like this? might be totally wrong, dint really thinkt it through ;p
像这样的东西？可能是完全错误的，真的想通了;p
CGRect frame = CGRectMake((self.view.frame.origin.x-imageview.frame.origin.x) +btn.frame.origin.x,
(self.view.frame.origin.y.imageview.frame.origin.y)+btn.frame.origin.y,
btn.frame.size.width,
btn.frame.size.height);
I don't know if theres any easier way.
不知道有没有更简单的方法。
