Question

I am using this famous airplay demo app: https://github.com/quellish/AirplayDemo/

and trying to figure out how to control the secondary screen from the primary. say for simplicity, having a button on screen 1 that if tapped on, will show something on screen 2 (Apple TV).

Any idea how to do that or how to use this demo app to support such a functionality?

thanks guys.

Answer 1

You can do this two different ways, you can try doing this by creating a delegate interface.
Try out this tutorial which explains you exactly how to create/use a delegate.

See: http://www.ios-developer.net/iphone-ipad-programmer/development/delegates/how-to-create-a-delegate

Or you can create a singleton of your class where you load your view controller.
So you can call this singleton and call your functions of the other view controller.

For singleton see: http://getsetgames.com/2009/08/30/the-objective-c-singleton/

I simply load my view controller in my AppDelegate and then when I push a button I call the UIApplication sharedInstance of my app. See the code below for a counter:

- (IBAction)raiseNumber:(id)sender {
int number = [[AppDelegate sharedInstance] getNumber];
number++;

[[AppDelegate sharedInstance] setNumber:number];

//Set to label on the remote view
[[AppDelegate sharedInstance].remoteViewController setNumber:number];
}

I hope this is very helpful, if there you have any questions let me know :-).