viewdidappear

I have a UITabBarController that nests a UIView-Subclass (ImageViewer) as it's third tab. In this ImageViewer Subclass I call the viewDidAppear method: - (void) viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; /* ... start custom code ... NSLog(@"viewDidAppear tag 1 passed); /* BREAKPOINT 1 here [myUIActivityIndicator stopAnimating]; NSLog(@"viewDidAppear tag 2 passed); /* BREAKPOINT 2 here /* ... end custom code ... } the method is called automatically, but strangely the view only appears after this method has been processed completely? When I set breakpoints (1 and 2) as

Does Android have an equivalent to Cocoa's viewDidLoad and viewDidAppear functions? If not, then how would I go about performing an action when a View appears? My app is a tabbed application, in which one of the tabs is a list of forum topics. I would like the topic list to be refreshed every time the view appears. Is such a thing possible in Android? The Activity class has onCreate and onResume methods that are pretty analagous to viewDidLoad and viewDidAppear. Activity.onResume EDIT To add to this, since some have mentioned in the comments that the view tree is not yet fully available during

I'm trying to figure out from Apple's sketchy documentation which method is the best place to be initializing and adding my Views controls to the controller's view. With winforms it's fairly straightforward, as they're always initialized inside InitializeDesigner , called in the constructor. I'm trying to match the reliability of this pattern if possible. I'm working with UIViewControllers and UITableViewControllers inside a UINavigationController most of the time - if this effects it all. Here's an example: public MyController() { // Here? AddViews(); } public override ViewDidLoad() { base

I'm developping an app for iOS 4.2+. I subclassed my UINavigationController to insert two UIImageView and make the navigation bar look custom. Everything is working great but I have a little problem. I created custom UIBarButtonItem and inside my view controllers i put them with : self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:backButton]; It works too but the problem is that to make this work I need to call it from: - (void)viewDidAppear:(BOOL)animated ; So it only appears after the animation and I can see the non customized button 1 second before the

Perviously when I wanted to make some actions when screen is opened I put them inside componentDidMount. For example I can fetch some data. like this. componentDidMount() { this.updateData(); } But with react-navigation componentDidMount occurs only one time when user open screen first time, and if later user open this page again it will not trigger componentDidMount. What is proper way to detect when page(screen) is activated and do actions? With react-navigation , you can do that. Add listeners in componentDidMount or componentWillMount this.subs = [ this.props.navigation.addListener(

I have a mainViewController. I call [self pushModalViewController:someViewController] which makes someViewController the active view. Now I want to call a function in mainViewController as someViewController disappears with [self dismissModalViewController]. viewDidAppear does not get called probably because the view was already there, just beneath the modal view. How does one go about calling a function in the mainViewController once the modalView dismisses itself? Thanks a lot! Grimless This answer was rewritten/expanded to explain the 3 most important approaches ( @galambalazs ) 1. Blocks