Objective-C cocoa touch: declaring properties over and over different view controllers
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This might be a stupid question, but I've found myself getting tired of declaring same property over and over multiple view controllers. Is there a better design to do something simple as below:

Consider this:
I have a SoundManager class that is used throughout my iphone project. This class simply plays audio (click sound) when a user presses button.

Now, I have been doing this:

**ViewController A: .h**

SoundManager *mgr;
@property (nonatomic,retain) SoundManager *mgr;

**ViewController A: .m**

@synthesize *mgr;

 and in viewDidLoad

if (mgr == nil)
  mgr = [[SoundManager alloc] init];


Then I repeat this over all my view controllers. This is cumbersome to say the least. There must be a better way of doing something like this - or at least a code generator utility that I could use?

Anyone have any suggestions?