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POUIScrollView setContentSize with subviews also laid out using constraints
 

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  1. POUIScrollView setContentSize with subviews also laid out using constraints
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    <p>Suppose i have the following <strong>implementation</strong>:</p> <ul> <li><code>UIPageViewController</code></li> <li><p><code>UIScrollView</code> called <em>mainScrollView</em> added as <code>subview</code> to the <code>UIPageViewController.view</code></p> <p>[UIScrollView setTranslatesAutoresizingMaskIntoConstraints:NO];</p></li> <li><p><code>UIScrollView</code> subviews laid out using <code>NSLayoutConstraints</code> and each of the subviews has been <code>setTranslatesAutoresizingMaskIntoConstraints</code> to NO.</p></li> </ul> <p>How can i set the content size of the <code>UIScrollView</code> to be equal to the biggest MaxY coordinate within its subviews?</p> <p>This is a sample of my code:</p> <pre><code>UIScrollView *scrollView = [self mainScrollView]; UIView *superView = [self view]; NSDictionary *viewsDictionary = NSDictionaryOfVariableBindings(scrollView, superView); [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollView(==superView)]|" options:0 metrics: 0 views:viewsDictionary]]; [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[scrollView(==superView)]|" options:0 metrics: 0 views:viewsDictionary]]; UIView *previousView = scrollView; for (int i=0;i&lt;150; i++) { UITextView * textView = [[UITextView alloc] init]; [textView setBackgroundColor:[UIColor colorWithRed:101.1f/255.f green:175.f/255.f blue:105.f/255.f alpha:1.f]]; [textView setTranslatesAutoresizingMaskIntoConstraints:NO]; [scrollView addSubview:textView]; [scrollView addConstraint:[NSLayoutConstraint constraintWithItem:textView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:previousView attribute:NSLayoutAttributeTop multiplier:1 constant:50]]; [scrollView addConstraint:[NSLayoutConstraint constraintWithItem:textView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:textView.superview attribute:NSLayoutAttributeLeft multiplier:1 constant:0]]; [scrollView addConstraint:[NSLayoutConstraint constraintWithItem:textView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeWidth multiplier:1 constant:0]]; [scrollView addConstraint:[NSLayoutConstraint constraintWithItem:textView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:40]]; previousView = textView; } </code></pre>
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    1. COAny help? i don't know what wrong i am doing when laying out subviews. The scrollView content size just isn't changing and i can scroll down to see other views.
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