Let's say I have a UIView that contains a child UIView which has to be 4:3. I want to solve this problem using AutoLayout in code.
I've been struggling with AutoLayout but I haven't figured out yet how to do this.
Do you know how to solve this problem?
Thank you very much.
I attach an image to explain better what I mean. http://d.pr/i/d0Oc
I figured out.
//Given a childView...
NSLayoutConstraint *constraint =[NSLayoutConstraint
constraintWithItem:childView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:childView
attribute:NSLayoutAttributeHeight
multiplier:4.0/3.0 //Aspect ratio: 4*height = 3*width
constant:0.0f];
[childView addConstraint:constraint];