title: Setting an image for a UIButton in code
body: <p>How do you set the image for a UIButton in code?</p>
  
  <p>I have this:</p>
  
  <pre><code>UIButton *btnTwo = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
  btnTwo.frame = CGRectMake(40, 140, 240, 30);
  [btnTwo setTitle:@"vc2:v1" forState:UIControlStateNormal];
  [btnTwo addTarget:self action:@selector(goToOne) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:btnTwo];
  </code></pre>
  
  <p>but don't see what will set the image for it.</p>