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( iOS ) What is superview and what is subviews - Stack Overflow A superview is a view that holds other views over it and subviews are the views being held added over a View Let's assume we have a view named MyView, which holds a UIButton (named loginButton) over it Here MyView is considered a superview for loginButton and loginButton is considered a subview of MyView For more, you should start from here As per the provided code snippet [self view
Given a view, how do I get its viewController? - Stack Overflow Yes, the superview is the view that contains your view Your view shouldn't know which exactly is its view controller, because that would break MVC principles The controller, on the other hand, knows which view it's responsible for (self view = myView), and usually, this view delegates methods events for handling to the controller Typically, instead of a pointer to your view, you should have
Could you explain receiver and view - superview in Swift? Views are stored in hierarchies, a tree basically, where each view can have many children (subviews), but only one parent (superview) In my example, "someView" is the superView (parent) in which "anotherView" will be added as a subview (child) In your sample, the class you are implementing there is both the receiver AND the superview
Autolayout: Add constraint to superview and not Top Layout Guide? None of the above answers worked for me, instead I have to do a hack to set my subview's top with superview's top instead with Top layout guide First, set the subview center vertically with superview
Determine whether UIView is visible to the user? - Stack Overflow For anyone else that ends up here: To determine if a UIView is onscreen somewhere, rather than checking superview != nil, it is better to check if window != nil In the former case, it is possible that the view has a superview but that the superview is not on screen:
ios - Resize superview after subviews change dynamically using . . . [Superview] Set all constraints the way you need, but pay big attention to the height constraint Assign it a random value, but make it optional, AutoLayout will set the height exactly to fit the subviews (blue arrows) This works perfectly, there is no need to call any additional system-layout update methods