Swift version: 5.6
Each view has its own co-ordinate system, meaning that if I tap a button and ask iOS where I tapped, it will tell me where I tapped relative to the top-left of the button. This is usually what you want, but if you want to translate a position in one view into a position it's easy enough to do.
As an example, this code creates two views, creates a virtual "tap", then converts it from the first view's co-ordinate space to the second's:
let view1 = UIView(frame: CGRect(x: 50, y: 50, width: 128, height: 128))
let view2 = UIView(frame: CGRect(x: 200, y: 200, width: 128, height: 128))
let tap = CGPoint(x: 10, y: 10)
let convertedTap = view1.convert(tap, to: view2)
That will set convertedTap
to X -140.0, Y -140.0.
SPONSORED An iOS conference hosted in Buenos Aires, Argentina – join us for the third edition from November 29th to December 1st!
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 2.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.