Changing text of IBOutlet UILabel via delegate - objective-c

Question

I am trying to change the text of an UILabel that is created via Storyboard. I have two ViewControllers, FirstViewController and SecondViewController. I dismiss the SecondViewController, call the method in the SecondViewController, the delegate method is called in the FirstViewController but the UILabel is nil.
Any idea why?
SecondViewController
-(void)back {
[self.navigationController popToRootViewControllerAnimated:YES];
[self.delegate points:#"10"];
}
FirstViewController
-(void)points:(NSString *)point {
labelPoints.text = [NSString stringWithFormat:#"Points: %#", point];
}

Answer 1

Is your FirstViewController rootViewController? Else pushing to rootViewController will remove First ViewController from stack. From Second View Controller first call delegate and then popViewController as below.
-(void)back {
[self.delegate points:#"10"];
[self.navigationController popViewControllerAnimated:YES];
}

Answer 2

You're popping the VC before you set the value. I would pop from your delegate object like this:
-(void)back {
[self.delegate points:#"10"];
}
-(void)points:(NSString *)point {
labelPoints.text = [NSString stringWithFormat:#"Points: %#", point];
[self.navigationController popToViewController:self animated:YES];
}
If this doesn't solve it, then you likely have another issue besides this one and would have to post more code.

Answer 3

Delay in setting text in UILabel worked for me
For example when delegate calls method like this:
[self.delegate selectedAttendee:dictAttendee];
[self.navigationController popViewControllerAnimated:YES];
This didn't worked for me:
-(void)selectedAttendee:(NSDictionary *)dictAttendee
{
lblMessageTo.text = [dictAttendee objectForKey:#"name"];
}
Solution
-(void)selectedAttendee:(NSDictionary *)dictAttendee
{
[self performSelector:#selector(addTextInMessageTo:) withObject:dictAttendee afterDelay:0.3];
}
-(void)addTextInMessageTo:(NSDictionary *)dictAttendee
{
lblMessageTo.text = [dictAttendee objectForKey:#"name"];
}