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POHow to make a custom view resize with the window with Cocoa Auto Layout?
 

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  1. POHow to make a custom view resize with the window with Cocoa Auto Layout?
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    <p>I have a single window with a single custom view in it, and I want the custom view to resize with the window so that it entirely fills it at any time. If I write:</p> <pre><code>NSView *contentView = [self.window contentView]; CustomView *customView = [[CustomView alloc] initWithFrame:[contentView bounds]]; [contentView addSubview:customView]; [contentView addConstraint: [NSLayoutConstraint constraintWithItem:customView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:contentView attribute:NSLayoutAttributeWidth multiplier:1 constant:0]]; [contentView addConstraint: [NSLayoutConstraint constraintWithItem:customView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:contentView attribute:NSLayoutAttributeHeight multiplier:1 constant:0]]; </code></pre> <p>Then the window doesn't let me resize it.<br> If I add:</p> <pre><code>[customView setTranslatesAutoresizingMaskIntoConstraints:NO]; </code></pre> <p>Then the custom view doesn't appear (<code>drawRect:</code> seems to never be called). I tried different ways (including the visual format <code>@"|[customview]|"</code>) but I always run into the same problems. I know it could be done with the older autoresizing system, with:</p> <pre><code>[customView setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable]; </code></pre> <p>but I want to use the Cocoa Auto Layout system, and I want to use it for more complicated cases (like several custom views that always fill the window).</p> <p>Does anyone know what is wrong and how I should use the Auto Layout system to get the result that I want?</p>
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    1. COThis might help for debugging: `[[contentView constraints].window visualizeConstraints:contentView.constraints];`
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    2. COI’ve tested three different ways of using Auto Layout for the situation you’ve described and all three work. There must be something else in your code that’s preventing Auto Layout from working as expected. Could you upload a minimal test case that reproduces your problem?
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    3. COIndeed, it does work, I cannot find what the problem was... I may at one point have applied the constraints before adding the view to the superview (but that does output an error on the console and I haven't seen it). Or maybe there was something else wrong, and by asking the question, it made me rewrite everything from scratch without the initial problem...
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