how to pass the variable in segue

Question

i have defined variable in GroupView.h

@interface GroupView()
{

  NSMutableArray *chatrooms;
}

@end

@implementation GroupView

Now i want to pass this variable in segue

@interface FriendsViewController ()

 @end

@implementation FriendsViewController


 else if ([segue.identifier isEqualToString:@"showGroupView"]) {
          GroupView *groupView  = (GroupView *)segue.destinationViewController;
          groupView.chatrooms = [NSMutableArray arrayWithArray:chatrooms];
  }

i know that chatrooms has to be property in header file to code this way but it is not

So is there any way to use this variable in segue.

Thanks for help.

Answer 1

chatrooms defined as an ivar like you have done is accessed using -> notation:

groupView->chatrooms = [NSMutableArray arrayWithArray:chatrooms]

This is generally discouraged, though. You should use a property instead:

@interface GroupView
@property (strong) NSMutableArray *chatrooms;
@end

Incidentally, if you're using an NSMutableArray, that indicates that you want to modify the element list of the array directly and not just replace the array wholesale. If you only ever want to replace the array with a whole new array every time, I suggest using NSArray instead.

Another point to make here is that you're attempting to cast the object held at segue.destinationViewController as a GroupView. You have either named a UIViewController subclass in a very misleading way, or you are not accessing the GroupView as a correct member of the UIViewController that is returned to you.