Array passing between classes, gone?

Hey guys . i have two classes, SelectionScreenTable & GraphView.

In the SelectionScreenTable class .h, i declared a NSMutableArray called usagedatas

    NSMutableArray *usagedatas;

}
@property (nonatomic, retain) NSMutableArray *usagedatas;

In the SelectionScreenTable class.m i remembered to @synthesize. Later on, while processing my methods, i did a

NSLog(@"usagedatas count:%i",usagedatas.count);

to check whether it has value and it returned 1. so yeah its good up to this point.

And in the -(void) dealloc , i remembered to released it .

[usagedatas release];

So now comes ME trying to use it in another class.

In GraphView.m i imported the "SelectionScreenTable.h". in the -(void)viewDidLoad i did

SelectionScreenTable *UD = [SelectionScreenTable alloc];

 NSLog(@开发者_如何学Go"GraphView UD.usagedataas.count =  :%i",UD.usagedatas.count);

it returned 0.

Any idea guys?

Hey guys, i solved it by creating the array in the AppDelegate instead. then in SelectionScreenTable i get the array from the AppDelegate and edit it. Then in GraphView i just call the array from the AppDelegate and it returns a value.