title: NSTimer memory management
body: <p>When I execute this code:</p>
  
  <pre><code>[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(showButtons) userInfo:nil repeats:NO];
  </code></pre>
  
  <p>do I need to nil it or release it, ot whatever for memory management?</p>
  
  <p>I am using ARC</p>