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
check this image and made your constraints like below… RESULT:- preview in different sizes With Stackview (For iOS 9.0 and above) NOTE: If you have to make app for iOS 9 and later then UIStackView is another option for you
First of all, are those other views (siblings of the table view) strictly above and below the table view? If so, have you considered letting the table view scroll normally, and putting those outside views in the table view’s header and footer views? Then you don’t need the scroll view. Second, you may want to … Read more
Let’s look at these one by one. “<NSAutoresizingMaskLayoutConstraint:0x84543d0 h=–& v=–& V:[UIView:0xa330270(768)]>” This is saying view 0xa330270 (A) must be 768 points high. “<NSLayoutConstraint:0xa338350 V:[UIView:0xa331260]-(-1)-| (Names: ‘|’:UIView:0xa330270 )>” This is saying view 0xa331260 (B)’s bottom edge must be a gap of -1 from the bottom of A, which is it’s superview. “<NSLayoutConstraint:0xa338390 V:|-(841)-[UIView:0xa331260] (Names: ‘|’:UIView:0xa330270 )>” … Read more
Your conclusions are right. The basic scheme is: setNeedsUpdateConstraints makes sure a future call to updateConstraintsIfNeeded calls updateConstraints. setNeedsLayout makes sure a future call to layoutIfNeeded calls layoutSubviews. When layoutSubviews is called, it also calls updateConstraintsIfNeeded, so calling it manually is rarely needed in my experience. In fact, I have never called it except when … Read more
After a few days of research and getting my hands dirty with UIScrollView + UITextView + Auto Layout, I successfully got a fully working UIScrollView. I want to share my solution just in case someone might stuck on the same situation. Add UIScrollView inside the main view in Storyboard Add UIView inside the UIScrollView Add … Read more
The image view’s intrinsic size is already dependent on the size of the image. Your assumptions (and constraints are correct). However, if you’ve set up your image view in interface builder and have not provided it with an image, then the layout system (interface builder) won’t know how big your image view is supposed to … Read more
Select the height constraint from the Interface builder and take an outlet of it. So, when you want to change the height of the view you can use the below code. yourHeightConstraintOutlet.constant = someValue yourView.layoutIfNeeded() Method updateConstraints() is an instance method of UIView. It is helpful when you are setting the constraints programmatically. It updates … Read more
Here is a picture of me doing it. I’m control-dragging from the constraint to the header file. In real life I’m more likely to control-drag to the anonymous category in the implementation file, because I don’t want an IBOutlet property to be public. So here’s a picture of that too. Sorry, this screen shot does … Read more
I had this problem as well.. It appears that the contentView’s frame doesn’t get updated until layoutSubviews is called however the frame of the cell is updated earlier leaving the contentView’s frame set to {0, 0, 320, 44} at the time when the constraints are evaluated. After looking at the contentView in more detail, It … Read more