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POiOS Autolayout: Issue with UILabels in a resizing parent view
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  1. POiOS Autolayout: Issue with UILabels in a resizing parent view
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    copied!<p>I've got a view that contains only a UILabel. This label contains multiline text. The parent has a variable width that can be resized with a pan gesture. My problem is that when I do this resizing the UILabel does not recalculate its height such that all of the content is still visible, it simply cuts it off.</p> <p>I've managed to fix it with a bit of a hack but it is horribly slow to run:</p> <pre><code>- (void)layoutSubviews { CGSize labelSize = [self.labelDescription sizeThatFits:CGSizeMake(self.frame.size.width, FLT_MAX)]; if (self.constraintHeight) { [self removeConstraint:self.constraintHeight]; } self.constraintHeight = [NSLayoutConstraint constraintWithItem:self.labelDescription attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:labelSize.height]; [self addConstraint:self.constraintHeight]; [super layoutSubviews]; } </code></pre> <p>Shouldn't this happen automatically with autolayout? </p> <p><strong>EDIT</strong></p> <p>The structure of my view is:</p> <pre><code>UIScrollView ---&gt; UIView ---&gt; UILabel </code></pre> <p>Here are the constraints on the UIScrollView:</p> <pre><code>&lt;NSLayoutConstraint:0x120c4860 H:|-(&gt;=32)-[DescriptionView:0x85c81c0] (Names: '|':UIScrollView:0x85db650 )&gt;, &lt;NSLayoutConstraint:0x120c48a0 H:|-(32@900)-[DescriptionView:0x85c81c0] priority:900 (Names: '|':UIScrollView:0x85db650 )&gt;, &lt;NSLayoutConstraint:0x120c48e0 H:[DescriptionView:0x85c81c0(&lt;=576)]&gt;, &lt;NSLayoutConstraint:0x120c4920 H:[DescriptionView:0x85c81c0]-(&gt;=32)-| (Names: '|':UIScrollView:0x85db650 )&gt;, &lt;NSLayoutConstraint:0x120c4960 H:[DescriptionView:0x85c81c0]-(32@900)-| priority:900 (Names: '|':UIScrollView:0x85db650 )&gt;, &lt;NSLayoutConstraint:0x8301450 DescriptionView:0x85c81c0.centerX == UIScrollView:0x85db650.centerX&gt;, </code></pre> <p>Here are the constraints on the UIView:</p> <pre><code>&lt;NSLayoutConstraint:0x85c4580 V:|-(0)-[UILabel:0x85bc7b0] (Names: '|':DescriptionView:0x85c81c0 )&gt;, &lt;NSLayoutConstraint:0x85c45c0 H:|-(0)-[UILabel:0x85bc7b0] (Names: '|':DescriptionView:0x85c81c0 )&gt;, &lt;NSLayoutConstraint:0x85c9f80 UILabel:0x85bc7b0.trailing == DescriptionView:0x85c81c0.trailing&gt;, &lt;NSLayoutConstraint:0x85c9fc0 UILabel:0x85bc7b0.centerY == DescriptionView:0x85c81c0.centerY&gt; </code></pre> <p>The UILabel itself has no constraints on it, aside from pinning it to the edges of its parent</p>
 

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