Top "Viewwillappear" questions

UIViewController instance method that notifies the view controller that its view is about to be added to a view hierarchy.

Why does viewWillAppear not get called when an app comes back from the background?

I'm writing an app and I need to change the view if the user is looking at the app while …

ios objective-c iphone viewwillappear
UIViewController viewDidLoad vs. viewWillAppear: What is the proper division of labor?

I have always been a bit unclear on the type of tasks that should be assigned to viewDidLoad vs. viewWillAppear: …

ios uiviewcontroller viewdidload viewwillappear
Swift - func viewWillAppear

I have a standard SingleViewApplication project. ViewController.swift import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any …

ios swift viewwillappear
react-navigation: Detect when screen, tabbar is activated / appear / focus / blur

Perviously when I wanted to make some actions when screen is opened I put them inside componentDidMount. For example I …

react-native react-navigation onfocus viewwillappear viewdidappear
UIViewController viewWillAppear not called when adding as subView

I have a UIViewController that I am loading from inside another view controller and then adding its view to a …

ios objective-c uiviewcontroller uiscrollview viewwillappear
viewWillAppear, viewDidAppear not being called, not firing

(This is both question and answer since it took quite a bit of digging to find the real answer.) Symptom: …

iphone objective-c uitabbarcontroller viewwillappear
Guidelines for viewWillAppear, viewDidAppear, viewWillDisappear, viewDidDisappear

Are there any guidelines for using these methods in the right manner? In particular, I would like to know what …

objective-c ios uiviewcontroller viewwillappear viewdidappear
What similar functionality method (viewWillAppear) exists on UIView?

viewWillAppear is called on UIViewController when a view is about to be shown on screen. Is it possible to get …

ios objective-c uiview uikit viewwillappear
About viewController's "viewDidLoad" and "viewWillAppear" methods

I've got a question regarding the two mentioned methods, since in my tests I don´t make clear the order …

ios uiviewcontroller viewdidload viewwillappear
Do I programmatically add SubViews in ViewDidAppear, ViewDidLoad, ViewWillAppear, the constructor?

I'm trying to figure out from Apple's sketchy documentation which method is the best place to be initializing and adding …

iphone xamarin.ios viewdidload viewdidappear viewwillappear