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iOS

Posted by Mohamed Moukhtar
Mohamed Moukhtar
Courses Plus Student 6,151 Points

CGAffineTransformScale and Auto layout constraints

I have two UIViews arranged using IB and all their constraints are built correctly. I am trying to use "CGAffineTransformScale" to change the scale of a UIView; my problem is after scaling the view I can't find any way to update my AL constraints.

I used view.updateConstraintsIfNeeded(), view.setNeedsDisplay(), view.layoutIfNeeded(), and view.setNeedsLayout() but no matter what I do I can't figure out a way to update my screen.

I really hope that someone would help to find a solution to my problem.

my code is:

        view2.transform = CGAffineTransformTranslate(view2.transform, -view2.bounds.width/2, -view2.bounds.height/2)
        view2.transform = CGAffineTransformScale(view2.transform, 2, 2)
        view2.transform = CGAffineTransformTranslate(view2.transform, view2.bounds.width/2, view2.bounds.height/2)
        view2.contentScaleFactor = 1
        view2.layer.borderColor = UIColor.blackColor().CGColor
        view2.layer.borderWidth = 1

        view.updateConstraintsIfNeeded()
        view.setNeedsDisplay()
        view.layoutIfNeeded()
        view.setNeedsLayout()