difficulty in singleton swift

Question

I am trying to use singleton in my swift app.
I have a class which i used in ObjectiveC and now i am using it in swift using bridging-header...

In singleton class here is my code...

SharedManger.h file

 +(SharedManager *)sharedInstance;

 @property (strong, nonatomic) NSMutableDictionary *dictobject;

SharedManger.m file

 + (id)sharedInstance
 {
      static SharedManager *sharedMyManager = nil;
      @synchronized(self)
      {
         if (sharedMyManager == nil)
           {

              static dispatch_once_t onceToken;

               dispatch_once(&onceToken, ^{

                  sharedMyManager = [self loadInstance];

            });  
       }
  }

  return sharedMyManager;
}

+(instancetype)loadInstance
{
     NSData* decodedData = [NSData dataWithContentsOfFile: [SharedManager filePath]];

  if (decodedData)
   {
       SharedManager* sharedData = [NSKeyedUnarchiver unarchiveObjectWithData:decodedData];
       return sharedData;
   }

   return [[SharedManager alloc] init];
 }

in viewcontroller.swift

 class var sharedInstance: viewcontroller {
    struct Static {
        static var onceToken: dispatch_once_t = 0
        static var instance: viewcontroller? = nil
    }
    dispatch_once(&Static.onceToken) {
        Static.instance = viewcontroller()
    }
    return Static.instance!
}

func sharedManager()->SharedManager{
    return SharedManager.sharedInstance()
}

Question:

So this is right approach in swift or any better approach is there?

Edit:
storyboard hierarchy is navbar -> loginVC -> VC1 ->VC2 as @Schemetrical says...i used his approach as singleton....it works fine when i comes from loginVC i can access data from singleton....
but after one time login my root view controller changes and comes from VC1 and that time it display empty singleton....why is it so?

Schemetrical · Accepted Answer · 2015-05-07 09:34:29Z

4

Swift 1.2 makes it really easy to create singletons. The static instance will be initialised only once and dictObject will be available for other classes to retrieve.

class SharedManager {

    static let sharedInstance = SharedManager()

    var dictObject = // some default value

}

answered May 7, 2015 at 9:34

Schemetrical

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6 Comments

Bhavin Bhadani Over a year ago

ok...so i just need to make one .swift file instead of my 2 objectiveC files

Schemetrical Over a year ago

Yes indeed. By default, within your project scope, all variables are available, but you can choose to make them private or public.

Schemetrical Over a year ago

Could you rephrase that?

Schemetrical Over a year ago

I wanted you to repeat the previous question because I didn't understand what you were trying to say ._.

Bhavin Bhadani Over a year ago

as in question , i have viewcontroller.swift file ...so am i write right code in it or not?

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