Question

I’m currently working on an app that will show a label that will start at zero, and count up to a number I specify. I wanted to do this using a simple loop like this one.

  for (counterInt = 0; counterInt < 10; counterInt++) 
    {
        NSLog(@"%i",counterInt); 
    }

The problem is, that this loop executes in less time than it takes for the view to appear on screen. My console logs 1-9 before the view finally loads with the label with showing 9. I’ve been researching for several hours trying to find a way to specify a duration for the loop and I can’t seem to find any thing on this.

So my overall question is, is it possible to specify how long the loop should take to execute? If so, if anyone can point me in the right direction here it would be greatly appreciated!

Answer 1

Even if you slowed down the loop, it still wouldn’t work. UI elements are only updated at the end of the run loop. You need to set up a timer and update the label in the method fired by the timer.