这是代码：

- (void)viewDidLoad
 {
       [super viewDidLoad];

      //......

      self.buttonHome = [UIButton buttonWithType:UIButtonTypeCustom];
      [self.buttonHome addTarget:self action:@selector(pressedHome:)
                                  forControlEvents:UIControlEventTouchUpInside];
      //....
      self.containerView =[[UIView alloc]initWithFrame:self.scrollView.frame];
      self.containerView.userInteractionEnabled=YES;

      [self.scrollView addSubview:self.containerView];
      [self.containerView addSubview:self.buttonHome];
  }

  -(void) pressedHome:(id)sender{
         //....
  }