How to pass a variable from View Controller to App Delegate

Question

I have a class within my AppDelegate.m file called PAEAudioHost which I am using to play audio, and I want to stop the audio file using a UIButton in my Detail:Controller.m file.

To stop and start the audio file you use the public member functions:

void (start) void (stop)

I have tried the following code in the detail controller:

 P11AppDelegate* app =[[UIApplication sharedApplication] delegate]; [app.host stop]

This produces an error stating: "Property 'host' not found on object of type 'DetailController *'"

Any ideas how I can achieve this?

Klevison · Accepted Answer · 2015-04-06 21:41:48Z

1

host (PAEAudioHost) is a public property insite your AppDelegate? So:

P11AppDelegate* app = [[UIApplication sharedApplication] delegate]; [app.host stop]

EDIT:

You should have a public property called host into AppDelegate.h:

@interface AppDelegate : UIResponder <UIApplicationDelegate> @property (strong, nonatomic) PAEAudioHost *host;

edited Apr 6, 2015 at 21:41

answered Apr 6, 2015 at 21:32

Klevison

3,5242 gold badges22 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Piepants Over a year ago

It needs to be cast: P11AppDelegate* app = (P11AppDelegate*) [[UIApplication sharedApplication] delegate];

willfo Over a year ago

This answer produced a couple of errors. The first states: "property with 'retain or (strong)' attribute must be of object type" and the second states: "unknown type name 'PAEAudioHost'

Klevison Over a year ago

You said: I have a class within my AppDelegate.m file called PAEAudioHost. You explained it wrong. Show all your and we can help you.

Collectives™ on Stack Overflow

How to pass a variable from View Controller to App Delegate

1 Answer 1

3 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Related