Implementing iAd using Singleton Class

问题

I am new to iPhone development. My objective is to implement a singleton class for iAd, so that I share the single instance of iAd over multiple view controllers?

Any help on the implementation side will be much appreciated?

回答1:

In your AppDelegate.h

@property (assign) YouiAdClass*iADObject    
+ (AppDelegate*) sharedApplication;
+ (YouriAdClass*)sharedAd

In your AppDelegate.m

@synthesize iADObject

+ (AppDelegate*) sharedApplication
{
    return [[UIApplication sharedApplication] delegate];
}

+(YouriAdClass*)sharedAd
{
    if(iAdObject==nil){
          iADObject=[YouriAdClass new]
   }
   return iADObject;
}

Now when you want to get your object in any place just call

YouriADClass*iadObject=[[AppDelegate sharedApplication] sharedAd];

And you will get always the same pointer. Remember to import AppDelegate andYouriADClass in your header files.

来源：https://stackoverflow.com/questions/11017759/implementing-iad-using-singleton-class