Question

I’m trying to pass NSDictionary between classes. In my AppDelegate I have instance NSDictionary.

@interface AppDelegate : UIResponder <UIApplicationDelegate, FBSessionDelegate, FBRequestDelegate> 
{
NSDictionary *contactsFromFacebook;
}
@property (strong, nonatomic) NSDictionary *contactsFromFacebook;

In my AppDelegate.m file I synthesized it as @synthesize contactsFromFacebook = _contactsFromFacebook;. Next my step (filling dictionary):

-(void)request:(FBRequest *)request didLoad:(id)result {
    _contactsFromFacebook = [[NSDictionary alloc]initWithDictionary:result];
}

In my someClass.m file I want to use data from contactsFromFacebook dictionary.

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSDictionary *someNewDictionary = [[NSDictionary alloc] initWithDictionary:appDelegate.contactsFromFacebook];

But my someNewDictionary is ampty. What I’m doing wrong?

Answer 1

In appDelegate write a method:

-(NSDictionary*)getSomething { return self.contactsFromFacebook; }

And then in other class:

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSDictionary *someNewDictionary = [[NSDictionary alloc] initWithDictionary:[appDelegate getSomething]];

And this works fine for me.

Edit:
@Abizern comment i think resolve your issue. He is right.