title: UIButton in SubView of ScrollView not working
body: <p>My problem is that my Button is not working when im paging to my subView. Is the button located on the ScrollView everything works fine.</p>
  
  <p><strong>Main ViewController</strong> </p>
  
  <pre><code>- (void)viewDidLoad
  {
  [super viewDidLoad];
  
  self.sView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
  self.sView.contentSize = CGSizeMake(self.sView.frame.size.width,
                                      self.sView.frame.size.height*2);
  self.sView.pagingEnabled=YES;
  self.sView.backgroundColor = [UIColor redColor];
  self.sView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
  [self.view addSubview:self.sView];
  
  self.sVC = [[StartViewController alloc] initWithNibName:nil bundle:nil];
  self.sVC.view.frame = CGRectMake(0, 0, self.sView.frame.size.width, self.sView.frame.size.height);
  
  [self.sView addSubview:self.sVC.view];
  
  [self addChildViewController:self.sVC];
  }
  </code></pre>
  
  <p><strong>Sub ViewController</strong></p>
  
  <pre><code> - (void)viewDidLoad
  {
  [super viewDidLoad];
  
  self.playView = [[UIView alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
  self.playView.backgroundColor = [UIColor greenColor];
  
  [self.view addSubview:self.playView];
  
  UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(50, 50, 50, 50)];
  btn.backgroundColor = [UIColor whiteColor];
  [btn addTarget:self action:@selector(show:) forControlEvents:UIControlEventTouchUpInside];
  
  [btn setUserInteractionEnabled:YES];
  
  [self.playView addSubview:btn];
  }
  
  - (void)show:(id)sender
  {
  NSLog(@"--test");
  }
  </code></pre>