Can I do addSubview several times without removeFromSuperview?
<p>Do I have to do removeFromSuperview for each addSubview?
For example, viewWillAppear is called whenever pushed view is popped.
If there is addSubview, it is called several times.</p>

<pre><code>- (void)viewWillAppear:(BOOL)animated {   
    [self.view addSubview:myView];
}
</code></pre>
