Objective C - loop to change label text

Question

i have a loop that looks like this

for(int x=0; x < 10; x++){
    [testLabel setText:[self randomString]];
    sleep(1);
}

The randomStr

Answer 1

It's better if you run your string on a background thread

[self performSelectorInBackground:@selector(updateBusyLabel:) withObject:[NSString stringWithFormat:@"Processing ... %i",iteration]];

-(void)updateBusyLabel:(NSString *)busyText {
    [_busyLabel setText:busyText];
}

I wouldn't use sleep(), and the timer is too much work.