title: iPhone view move animation
body: <p>I want to move one view to right when I clicked a button.
  I wrote something but it's not working;</p>
  
  <pre><code>UIView* view = [self.view viewWithTag:100];
  if (!view) {
      NSLog(@"nil");
  }
  
  [UIView animateWithDuration:0.3f 
                   animations:^{
                       [view setTransform:CGAffineTransformMakeTranslation(-100, 0)];
  
                   }
                   completion:^(BOOL finished){
  
                   }
   ];
  </code></pre>