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Asked: 2026-06-16T02:06:18+00:00

I’m trying to use autolayout FROM CODE to correctly handle rotation in my UIScrollView

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I’m trying to use autolayout FROM CODE to correctly handle rotation in my UIScrollView that contains many UILabel generated at runtime for every page of a UIPageControl.

I’ve not found so many examples, so i ask if anyone has examples about UIScrollView with autolayout with NSLayoutConstraints.

EDITED
To be clearer: i create at runtime different UILabels and add them to UIScrollView. In portrait it’s:


(source: disclafani.org)

While in landscape is wrong:

(source: disclafani.org)

How can it be solved using autolayout? I’ve tried using:

NSLayoutConstraint *cons1=[NSLayoutConstraint
constraintWithItem:label 
attribute:NSLayoutAttributeLeft          
relatedBy:NSLayoutRelationEqual 
toItem:label2 attribute:NSLayoutAttributeLeft 
multiplier:1.0 
constant:[UIScreen mainScreen].bounds.size.width*-1
                          ];

but it does not work and i don’t think this is the right approach

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1 Answer

  1. Editorial Team

    There are actually two quite different strategies, which Apple describes in great detail in this article, and which I illustrate in these two examples:

    Keep in mind, though, that UILabel is a very special case, because of its use of instrinsic size rules. It is hard to say more without knowing more details of your case.

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