How to access common memory location via multiple VCs ?

Question

I am creating an iOS app that uses core data in almost every VC.

The app has many Navigation Controller and different types of segues.

I want all these viewControllers to be using the same Managed object context. Also, I do not want to keep using prepare to segue to do this as I can use that to pass more relevant info for a particular VC.

Hence, I need help to create a central class or something similar that will help me get the same instance of the managed object context in all my VCs.

Try singleton. http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios — Desdenova, Jul 19 '13 at 07:45

score 2 · Accepted Answer · answered Jul 19 '13 at 07:54

Singleton Pattern!

@class SingleTonnedClass;
@interface SingleTonnedClass : NSObject
   + (SingleTonnedClass*)sharedInstance;
   - (id)getterInstanceMethod;
   .
   .
   .
@end

In .m

@implementation SingleTonnedClass
  SingleTonnedClass *singleTonInstance;
  + (SingleTonnedClass*)sharedInstance
    {
       if(!singleTonInstance)
       {
         singleTonInstance = [SingleTonnedClass new];
       }
    }

  ...
  .
  .
  other method implementation
@end

From anywhere in your project you can access the instance of SingleTon class by just including its header and,

  [SingleTonnedClass shatedInstance]; //will return you the singleton instance

and access methods like this

 [[SingleTonnedClass sharedInstance]someMethod];

How to access common memory location via multiple VCs ?

1 Answers1