IOS – Calling App Delegate method from ViewController


What I am trying to do is click a button (that was created in code) and have it call up a different view controller then have it run a function in the new view controller.

I know it could be done relatively easily in IB but that isn't an option.

An example of what I want to do would be if you had two view controllers one with a splash screen of house. The other view controller had a walk through of the house on it that you could go through all the rooms in a set order. The splash screen would have buttons for each room that would allow you to jump to any point on the walk through.

Best Solution

You can access the delegate like this:

MainClass *appDelegate = (MainClass *)[[UIApplication sharedApplication] delegate];

Replace MainClass with the name of your application class.

Then, provided you have a property for the other view controller, you can call something like:

[appDelegate.viewController someMethod];