Question

I have a little problem with a delegate property.

The property “shifts” is a NSMutableArray of objects, initialized and populated by AppDelegate.

@interface isaavAppDelegate : UIResponder <UIApplicationDelegate> {
    NSMutableArray *shifts;
}
@property (nonatomic, retain) NSMutableArray *shifts;

In a tableview controller, I try to use the data in the array like this:

I declare a new NSMutableArray changePersons:

NSMutableArray *changePersons;

Then in the viewdidload method:

appDelegate = (isaavAppDelegate *)[[UIApplication sharedApplication] delegate];
changePersons = appDelegate.shifts;

So I use a NSPredicate to filter the data in the array, but when the changePersons array changes, also appDelegate.shifts changes and I don’t understand why…

I tried to copy the array like this:

changePersons = [appDelegate.shifts];

But when I try to apply the filter with NSPredicate, the App crashes and I get an invalid selector.

Anyone can help me?

Thanks, Marco

Answer 1

Try

changePersons =[NSMutableArray arrayWithArray:appDelegate.shifts];