title: IOS apply CAlayer to all UILabel layers
body: <p>I need to apply CAlayer which I did to all my UIlabels on my view</p>
  
  <p>I have 6 UIlabels on my view and I did a CAlayer as below code and want to apply this layer to all my UIlabels</p>
  
  <pre><code>CALayer *lay=[CALayer layer];
  lay.borderWidth=2;
  lay.borderColor=[UIColor darkGrayColor].CGColor;
  
  [out_lat_min.layer addSublayer:lay]; 
  </code></pre>
  
  <p>one of my UIlabel called out_lat_min</p>
  
  <p>but not work, could you support me?</p>