title: Animation slows down as it ends
body: <p>I have a translate animation, moving my button from A to B.</p>
  
  <p>That route looks like this:</p>
  
  <p>1) Button slowly accelerates
  2) At the middle of animation gets to the peak of it's speed
  3) Slows down as it approaches the end</p>
  
  <p>This is my code</p>
  
  <pre><code>[UIView animateWithDuration:speed
                        delay:delay
                      options:UIViewAnimationOptionAllowUserInteraction
                   animations:^(void){
                       [UIView setAnimationRepeatCount:5];
                       cloud.frame = (CGRectMake(cloud.frame.origin.x,   
  cloud.frame.origin.y+900, cloud.frame.size.width, cloud.frame.size.height));
  
                   }completion:nil];
  </code></pre>
  
  <p>I want my animation to have a same speed all the time.</p>
  
  <p>How can I achieve this?</p>