title: iOS 7 UIBarButton back button arrow color
body: <p>I'm trying to change the back button arrow </p>
  
  <p><img src="https://i.stack.imgur.com/xwOa0.jpg" alt="enter image description here"></p>
  
  <p>I'm currently using the following to control the text size as well as the text color on the back button:</p>
  
  <pre><code>[[UIBarButtonItem appearance] setTitleTextAttributes:
    [NSDictionary dictionaryWithObjectsAndKeys:
      [UIColor whiteColor], UITextAttributeTextColor,
      [UIFont boldSystemFontOfSize:16.0f], UITextAttributeFont,
      [UIColor darkGrayColor], UITextAttributeTextShadowColor,
      [NSValue valueWithCGSize:CGSizeMake(0.0, -1.0)], UITextAttributeTextShadowOffset,
    nil] forState:UIControlStateNormal];
  </code></pre>
  
  <p>but if I want to change only the arrow's color for the back button, what should i do?</p>