title: Button is disabled when adding background
body: <p>I am using Parse anypic tutorial and I want to create a somehow different UI. But I have some troubles.</p>
  
  <p>So, my ViewController is this :</p>
  
  <pre><code>@interface PAPHomeViewController ()
  @property (nonatomic, strong) PAPSettingsActionSheetDelegate *settingsActionSheetDelegate;
  @property (nonatomic, strong) UIView *blankTimelineView;
  @end
  
  @implementation PAPHomeViewController
  
  - (void)viewDidLoad {
      [super viewDidLoad];
  
      NSLog(@"LoadView is called");
  
      // Present Anypic UI
      [self presentUI];
  
  }
  
  -(void) presentUI {
  
  /*UIImageView *backgroundImageView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
          [backgroundImageView setImage:[UIImage imageNamed:@"DefaultAnypic.png"]];
          self.view = backgroundImageView;*/
  
      // Settings button
      self.settingsButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
      [self.settingsButton addTarget:self
                 action:@selector(settingsButtonAction:)
       forControlEvents:UIControlEventTouchUpInside];
      [self.settingsButton setTitle:@"Settings" forState:UIControlStateNormal];
      self.settingsButton.frame = CGRectMake(200.0, 200.0, 100.0, 100.0);
      [self.view addSubview:self.settingsButton];
  }
  </code></pre>
  
  <p>and its .h file is this :</p>
  
  <pre><code>@interface PAPHomeViewController : PAPPhotoTimelineViewController
  
  @end
  </code></pre>
  
  <p>The PAPPhotoTimelineViewController is also a separateViewController, which the Home extends from and it is a tableViewController, which also calls ViewDidLoad.</p>
  
  <p><strong>The problem :</strong></p>
  
  <p>With the above Code, I see my button and I can click on my button.</p>
  
  <p>But, if I uncomment stuff for the background, I do see the background, I do see the button, but it cannot be clicked - it is like no touch on the button is identified.</p>
  
  <p>I am also confused, now that I am extending another ViewController which also implements viewDidLoad, why they are both called, in which order etc.</p>