Question

How can I save NSArray in NSUserDefaults and then load it back in an NSMutableArray to populate the UIPickerView?

Also the issue is that new values would be added to that NSMutableArray and then that array will be converted to NSArray to be saved in NSUserDefaults (as NSMutableArray can’t be saved in NSUserDefaults).

Any help appreciated..

Thanks

Answer 1

 [[NSUserDefaults standardUserDefaults] setObject:yourMutableArray forKey:@"Key"];

A mutable array can be stored since it is a subclass of NSArray.

To get the value as an NSMutableArray:

NSMutableArray *array = [NSMutableArray arrayWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"Key"]];

or

NSMutableArray *array = [[[NSUserDefaults standardUserDefaults] objectForKey:@"Key"] mutableCopy];