Question

How to access a property value of AppDelegate class from someView Controller without creating reference of the delegate in view controller?

Answer 1

I’m not quite sure what you mean – there are multiple ways to get information from your application delegate into a view controller, and the phrase “without creating reference of the delegate” is unclear. Your options basically are:

1. Reference the application delegate, casting as appropriate. You would write code in your view controller class like:

   id propertyValue = [(MyAppDelegate *)[[UIApplication sharedApplication] delegate] myProperty];

2. Pass the property in when creating the view controller. This requires the view controller to have a @property declared and @synthesized for use, then you would have the app delegate just set the property on the view controller instance.

Neither of these options require that you retain a copy of your app’s delegate as a @property, but the first does reference the delegate once.