iPhone - Get Position of UIView within entire UIWindow
IphoneCocoa TouchIosUiviewUiwindowIphone Problem Overview
The position of a UIView
can obviously be determined by view.center
or view.frame
etc. but this only returns the position of the UIView
in relation to it's immediate superview.
I need to determine the position of the UIView
in the entire 320x480 co-ordinate system. For example, if the UIView
is in a UITableViewCell
it's position within the window could change dramatically irregardless of the superview.
Any ideas if and how this is possible?
Cheers :)
Iphone Solutions
Solution 1 - Iphone
That's an easy one:
[aView convertPoint:localPosition toView:nil];
... converts a point in local coordinate space to window coordinates. You can use this method to calculate a view's origin in window space like this:
[aView.superview convertPoint:aView.frame.origin toView:nil];
2014 Edit: Looking at the popularity of Matt__C's comment it seems reasonable to point out that the coordinates...
- don't change when rotating the device.
- always have their origin in the top left corner of the unrotated screen.
- are window coordinates: The coordinate system ist defined by the bounds of the window. The screen's and device coordinate systems are different and should not be mixed up with window coordinates.
Solution 2 - Iphone
Swift 5+:
let globalPoint = aView.superview?.convert(aView.frame.origin, to: nil)
Solution 3 - Iphone
Swift 3, with extension:
extension UIView{
var globalPoint :CGPoint? {
return self.superview?.convert(self.frame.origin, to: nil)
}
var globalFrame :CGRect? {
return self.superview?.convert(self.frame, to: nil)
}
}
Solution 4 - Iphone
In Swift:
let globalPoint = aView.superview?.convertPoint(aView.frame.origin, toView: nil)
Solution 5 - Iphone
Here is a combination of the answer by @Mohsenasm and a comment from @Ghigo adopted to Swift
extension UIView {
var globalFrame: CGRect? {
let rootView = UIApplication.shared.keyWindow?.rootViewController?.view
return self.superview?.convert(self.frame, to: rootView)
}
}
Solution 6 - Iphone
For me this code worked best:
private func getCoordinate(_ view: UIView) -> CGPoint {
var x = view.frame.origin.x
var y = view.frame.origin.y
var oldView = view
while let superView = oldView.superview {
x += superView.frame.origin.x
y += superView.frame.origin.y
if superView.next is UIViewController {
break //superView is the rootView of a UIViewController
}
oldView = superView
}
return CGPoint(x: x, y: y)
}
Solution 7 - Iphone
this worked for me
view.layoutIfNeeded() // this might be necessary depending on when you need to get the frame
guard let keyWindow = UIApplication.shared.windows.first(where: { $0.isKeyWindow }) else { return }
let frame = yourView.convert(yourView.bounds, to: keyWindow)
print("frame: ", frame)