So I think the underlying issue is a kind of chicken and egg problem. In order to ‘aspect fit’ the image to the UIImageView the system needs a size for the view, and yet we would like the height of the view to be determined after aspect fitting the image given a known width for … Read more
I use pure structure like the following -view -scrollView -view A -view B -Button Make sure Button(THE LAST view) has a constraint(vertical spacing from its bottom to superview, which is the scrollview), in this case, no matter what changes for your view A and view B would be, scrollView’s height will be changed accordingly. I … Read more
Swift 4.x version of Kubba’s answer: Need to Update Line Break as Clip/WordWrap/ in Interface builder to corresponding buttons. class ResizableButton: UIButton { override var intrinsicContentSize: CGSize { let labelSize = titleLabel?.sizeThatFits(CGSize(width: frame.width, height: .greatestFiniteMagnitude)) ?? .zero let desiredButtonSize = CGSize(width: labelSize.width + titleEdgeInsets.left + titleEdgeInsets.right, height: labelSize.height + titleEdgeInsets.top + titleEdgeInsets.bottom) return desiredButtonSize } … Read more
Here’s an elegant, up to date solution. As stated by others, first make sure that all you have constraints running from the very top of your header view to the top of the first subview, from the bottom of the first subview to the top of the second subview, etc, and from the bottom of … Read more
Unfortunately you cannot do this using cornerRadius and autolayout — the CGLayer is not affected by autolayout, so any change in the size of the view will not change the radius which has been set once causing, as you have noticed, the circle to lose its shape. You can create a custom subclass of UIImageView … Read more
Based on a ton of observation I believe (but cannot know for certain) that the constraints named UIView-Encapsulated-Layout-Width and UIView-Encapsulated-Layout-Height are created by UICollectionView and friends, and exist to enforce the size returned by the sizeForItemAtIndexPath delegate method. I guess it’s there to ensure that the UICollectionViewCell set up by cellForItemAtIndexPath ends up the size … Read more
Now, Interface Builder lets the user change dynamically the size of every view controllers in storyboard, to simulate the size of a certain device. Before this functionality, the user should set manually each view controller size. So the view controller was saved with a certain size, which was used in initWithCoder to set the initial … Read more
Did some decompiling and there’s actually a way: for Swift 5 UserDefaults.standard.set(false, forKey: “_UIConstraintBasedLayoutLogUnsatisfiable”) Objective-C [[NSUserDefaults standardUserDefaults] setValue:@(NO) forKey:@”_UIConstraintBasedLayoutLogUnsatisfiable”]; Now you’ll only get notified that “_UIConstraintBasedLayoutLogUnsatisfiable is OFF”. Obligatory reminder for anyone reading this: this should be last resort, for tips on debugging and fixing constraint issues see WWDC’s “Mysteries of Auto Layout” sessions: part … Read more
I activate and deactivate NSLayoutConstraints in viewDidLoad, and I do not have any problems with it. So it does work. There must be a difference in setup between your app and mine 🙂 I’ll just describe my setup – maybe it can give you a lead: I set up @IBOutlets for all the constraints that … Read more
There is an arrow to the right of the constraint constant value. If you click on it, a menu pops out where you can choose what is it that you want to make your constraint relative to. If you choose ‘View’, than it will pin it to the top of the view.