How to update a UI label from a non UI thread in iOS

Question

I am new to iOS development, I have plain objective -c class \"MoneyTimer.m\" for running timer, from there i want to update the an UI label with the changing value of timer.

Answer 1

Assuming that label lives in the same class:

    if(nsTimerUp == nil){
        nsTimerUp = [NSTimer scheduledTimerWithTimeInterval: 1.0 target:self selector:@selector(countUpH) userInfo:nil repeats: YES];
    [self performSelectorOnMainThread:@selector(updateLabel)
                                           withObject:nil
                                        waitUntilDone:NO];

    }

-(void)updateLabel {
    self.myLabel.text = @"someValue";
}