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POUIScrollView doesn't scroll - even with valid content size and scroll enabled
 

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  1. POUIScrollView doesn't scroll - even with valid content size and scroll enabled
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    <p>In my <code>viewDidAppear</code> method (in which i call to the super method) I have the following code:</p> <pre><code>UIScrollView *navbar = [[UIScrollView alloc] init]; [navbar setScrollEnabled:YES]; [navbar setBackgroundColor:[UIColor redColor]]; [navbar setTranslatesAutoresizingMaskIntoConstraints:NO]; [self.view addSubview:navbar]; NSDictionary *viewsDictionary2 = NSDictionaryOfVariableBindings(navbar); [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[navbar]|" options:0 metrics:nil views:viewsDictionary2]]; [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[navbar]|" options:0 metrics:nil views:viewsDictionary2]]; NSArray *categories = @[@"nav1", @"nav2", @"nav3", @"nav4", @"nav5", @"nav6", @"nav7", @"nav8", @"nav9", @"nav10", @"nav11", @"nav12", @"nav13"]; NSMutableArray *tempCategoryImages = [NSMutableArray array]; for (NSInteger i = 0; i &lt; categories.count; i++) { [tempCategoryImages insertObject:[UIImage imageNamed:categories[i]] atIndex:i]; } NSArray *categoryImages = [tempCategoryImages copy]; // Add subviews. // CGFloat xPadding = 25.0f; UIView *previousImageView = NULL; for (NSInteger i = 0; i &lt; categoryImages.count; i++) { UIImageView *imageView = [[UIImageView alloc] initWithImage:categoryImages[i]]; [imageView setTranslatesAutoresizingMaskIntoConstraints:NO]; [navbar addSubview:imageView]; if (i == 0) { // // First category. // [navbar addConstraint:[NSLayoutConstraint constraintWithItem:imageView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:imageView.superview attribute:NSLayoutAttributeLeft multiplier:1 constant:0]]; } else { // // End categories. // [navbar addConstraint:[NSLayoutConstraint constraintWithItem:imageView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:previousImageView attribute:NSLayoutAttributeRight multiplier:1 constant:xPadding]]; } [navbar addConstraint:[NSLayoutConstraint constraintWithItem:imageView attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:imageView.superview attribute:NSLayoutAttributeCenterY multiplier:1 constant:0]]; previousImageView = imageView; } // Set content size. // CGSize scrollContentSize = CGSizeZero; for (NSInteger i = 0; i &lt; categories.count; i++) { UIImage *tempImage = [UIImage imageNamed:categories[i]]; // Width. // scrollContentSize.width += tempImage.size.width; // Height. // if (tempImage.size.height &gt; scrollContentSize.height) { scrollContentSize.height = tempImage.size.height; } } navbar.contentSize = scrollContentSize; </code></pre> <p>Which when i log the scrollviews properties, it has the subviews, a large enough content size and scrolling enabled.</p> <p>Even when I add the <code>UIScrollView</code> to IB and link it to the same code it then works? (I comment out the <code>NSAutoLayout</code> code.</p> <p>This leads me to believe that for the UIScrollView to work, I cannot use Auto layout.</p> <p>Am I missing something?</p> <p>Thanks </p> <p><em><strong>EDIT</em></strong></p> <p>The code also doesn't work programatically, when I try <code>initWithFrame:</code><em>frame</em> with <code>setTranslatesAutoresizingMaskIntoConstraints:YES</code></p>
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    1. USAdam Carter
    1. USAdam Carter
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    1. COI haven't exactly found an answer, I've just rewritten my app so I use IB instead of coding it in.
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      1. POUIScrollView doesn't scroll - even with valid content size and scroll enabled
      1. USAdam Carter
    2. COcheck the example linked in: http://stackoverflow.com/a/16029013/400544
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      1. POUIScrollView doesn't scroll - even with valid content size and scroll enabled
      1. USpgpb.padilla
 

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