ScrollView 分割屏幕效果

 CGRect screentRect = self.view.bounds;
    CGRect bigRect = screentRect;
    bigRect.size.width *= 2.0;
//    bigRect.size.height *= 2.0;
    
    //创建一个UIScrollView对象，将其尺寸设置为窗口大小
    UIScrollView *scrollView = [[UIScrollView alloc]initWithFrame:screentRect];
    //分栏
    [scrollView setPagingEnabled:YES];
    [self.view addSubview:scrollView];
    
    //创建一个有着超大尺寸的BNRHypnosisView 对象并将其加入UIScrollView对象
//    BNRHypnosisView *hypnosisView = [[BNRHypnosisView alloc]initWithFrame:bigRect];
    BNRHypnosisView *hypnosisView = [[BNRHypnosisView alloc]initWithFrame:screentRect];
    [scrollView addSubview:hypnosisView];
    
    //创建第二个大小与屏幕相同的BNRHypnosisView对象并放置在第一个BNRHypnosisView
    //对象的右侧，使其刚好移出屏幕外
    screentRect.origin.x +=screentRect.size.width;
    BNRHypnosisView *anotherView = [[BNRHypnosisView alloc]initWithFrame:screentRect];
    [scrollView addSubview:anotherView];
    
    //告诉UIScrollView对象"取景" 范围有多大
    scrollView.contentSize = bigRect.size;