CODEWITHSUNDEEP
iosobjective-cviewcontroller
Whelandrew
Whelandrew

Reputation: 195

Call a function when a view controller is on top

I'm wondering if there is a method that would call when a view controller is loaded to the screen.

As an example, the user presses a button and a second view controller loads. When the view controller appears, it runs a function automatically.

Upvotes: 0

Views: 943

Answers (1)

LyricalPanda
LyricalPanda

Reputation: 1414

There are several methods you can use in a ViewController to run functions depending when you need them to run. In your case, you should use

-(void) viewDidAppear:(BOOL)animated

This will run once the viewController is appearing on the screen. Be sure to also call [super viewDidAppear:animated] inside the method.

Other methods that may come in handy:

-(void) viewDidLoad
-(void) viewWillAppear:(BOOL)animated
-(void) viewWillDisappear:(BOOL)animated
-(void) viewDidDisappear:(BOOL)animated

Upvotes: 2

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