title: How Do I write a Timer in Objective-C?
body: <p>I am trying to make a stop watch with NSTimer.</p>
  
  <p>I gave the following code:</p>
  
  <pre><code> nst_Timer = [NSTimer scheduledTimerWithTimeInterval:0.001 target:self selector:@selector(showTime) userInfo:nil repeats:NO];
  </code></pre>
  
  <p>and it is not working in milliseconds. It takes more than 1 millisecond.</p>