How to get the frame of a view inside another view?

I guess you are looking for this method

– convertRect:toView:

// Swiftlet frame = imageView.convert(button.frame, to: self.view)// Objective-CCGRect frame = [imageView convertRect:button.frame toView:self.view];

There are four UIView methods which can help you, converting CGPoints and CGRects from one UIView coordinate reference to another:

– convertPoint:toView:– convertPoint:fromView:– convertRect:toView:– convertRect:fromView:

so you can try

CGRect f = [imageView convertRect:button.frame toView:self.view];

or

CGRect f = [self.view convertRect:button.frame fromView:imageView];

Swift 3

You can convert the button's frame to the view's coordinate system with this:

self.view.convert(myButton.frame, from: myButton.superview)

Make sure to put your logic inside viewDidLayoutSubviews and not viewDidLoad. Geometry related operations should be performed after subviews are laid out, otherwise they may not work properly.

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.superview instead of myImageView when converting the frame.

Here are more options for converting a CGPoint or 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 Docs for more on converting a CGPoint or CGRect.