title: How to toggle the visibility of buttons with a timer?
body: <p>Ive added an NSTimer to make my rate button appear by setting the action to Hidden NO</p>
  
  <pre><code>NSMethodSignature *sgn = [self methodSignatureForSelector:@selector(onTick:)];
      NSInvocation *inv = [NSInvocation invocationWithMethodSignature: sgn];
      [inv setTarget: self];
      [inv setSelector:@selector(onTick:)];
  
      NSTimer *t = [NSTimer timerWithTimeInterval: 10.0
                                       invocation:inv
                                          repeats:YES];
  
      NSRunLoop *runner = [NSRunLoop currentRunLoop];
      [runner addTimer: t forMode: NSDefaultRunLoopMode];
  </code></pre>
  
  <p>Then </p>
  
  <pre><code>-(void)onTick:(NSTimer *)timer {
  _Rateapp1.hidden = NO;
  _ratebomb.hidden = NO;
  _ratelab1.hidden = NO;
  }
  </code></pre>
  
  <p>BUT how do I make the button re-Appear with YES?</p>