Get Position of UIView within entire UIWindow

 

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 :)

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.

    • 在Swift中： 

    let globalPoint = aView.superview?.convertPoint(aView.frame.origin, toView: nil)

    Swift 4 ： 

    let globalPoint = aView.superview?.convert(aView.frame.origin, to: nil)
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