The relationship between two user interface objects that must be satisfied by the constraint-based layout system .
Read moreWhat is Systemlayoutsizefitting?
Returns the optimal size of the view based on its current constraints. iOS 6.0+ iPadOS 6.0+ Mac Catalyst 13.1+
Read moreWhat is stack view in iOS?
Overview. Stack views let you leverage the power of Auto Layout , creating user interfaces that can dynamically adapt to the device’s orientation, screen size, and any changes in the available space. The stack view manages the layout of all the views in its arrangedSubviews property.
Read moreWhat is a stack view?
Stack views are a powerful tool for quickly and easily designing your user interfaces . Their attributes allow a high degree of control over how they lay out their arranged views. You can augment these settings with additional, custom constraints; however, this increases the layout’s complexity.21 Mar 2016
Read moreWhat is a UIViewController?
A UIViewController is an object which manages the view hierarchy of the UIKit application . The UIViewController defines the shared behavior and properties for all types of ViewController that are used in the iOS application. The UIViewController class inherits the UIResponder class.
Read moreWhich is called first viewDidLoad or viewWillAppear?
viewDidLoad is things you have to do once, you should do things that you only have to do once in viewDidLoad – like setting your UILabel texts. viewWillAppear is called just before the view is displayed . This happens always after viewDidLoad and is called every time the view is displayed.
Read moreWhich method is called first in a ViewController’s lifecycle?
viewDidAppear(_:) This method gets called after the view controller appears on screen. You can use it to start animations in the user interface, to start playing a video or a sound, or to start collecting data from the network.
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