title: Why UIButton does not require to alloc and init?
body: <p>Why UIButton does not require to alloc and init call instead we use only 
  <code>UIButton *myBtn = [UIButton buttonWithType:UIButtonTypeCustom];</code>.</p>
  
  <ol>
  <li>Does the above line automatically alloc s and init the uibutton??</li>
  <li>Is it necessary to release myBtn?,since i'm not using alloc and init explicitly.</li>
  </ol>
  
  <p>This may be a simple question but i don't know the correct answer for this, does anybody can help? Any help is appreciated,thanks in advance.</p>