title: addSubview is not displayed UIView
body: <p>I described <code>[self.view addSubView:myView];</code>,<br>
  but, myView is not displaying <code>self.view</code>.</p>
  
  <p>ViewController.h</p>
  
  <pre><code>@interface ViewController : UIViewController{
      UIView *myView;
  }
  
  @property (nonatomic, strong) UIView *myView;
  </code></pre>
  
  <p>ViewController.m</p>
  
  <pre><code>@synthesize myView;
  
  - (void)viewDidLoad
  {
      [super viewDidLoad];
  
      myView.frame = CGRectMake(-10, 70, 320, 480);
      [self.view addSubview:myView];
      myView.backgroundColor = [UIColor redColor];
      [self.view bringSubviewToFront:myView];
  }
  </code></pre>
  
  <p>Do you have any solutions?</p>