的UIScrollView不滾動水平

Question

低於我的UIScrollView沒有橫向滾動，請幫我在這裏..

FirstView = [[UIView alloc] initWithFrame:CGRectMake(60, 0, 100, 150)]; 
    [FirstView setBackgroundColor:[UIColor clearColor]]; 

    SecondView = [[UIView alloc] initWithFrame:CGRectMake(320+60, 0, 100, 150)]; 
    [SecondView setBackgroundColor:[UIColor clearColor]]; 

    HolderView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 1000, 150)]; 

    scrHorizontalScroll = [[UIScrollView alloc]initWithFrame:HolderView.frame]; 
     [scrHorizontalScroll setBackgroundColor:[UIColor redColor]]; 
    [scrHorizontalScroll setContentSize:CGSizeMake(999, 150)]; 
    [scrHorizontalScroll setScrollEnabled:YES]; 
    [HolderView addSubview:scrHorizontalScroll]; 
[scrHorizontalScroll addSubView:FirstView]; [scrHorizontalScroll addSubView:SecondView]; [HolderView addSubView: scrHorizontalScroll]; 

的HolderView沒有水平滾動，但它發生了，請大家幫忙

注：我有一個MAINVIEW根據框架座標在其頂部添加HolderView。

[mainView addSubView:label].... [mainView addSubView:HolderView]; 

這是完整結構

Answer 1

當其含量大小爲更大比其幀A滾動視圖只會滾動。

Answer 2

FirstView = [[UIView alloc] initWithFrame:CGRectMake(60, 0, 100, 150)]; 
     [FirstView setBackgroundColor:[UIColor clearColor]]; 

     SecondView = [[UIView alloc] initWithFrame:CGRectMake(320+60, 0, 100, 150)]; 
     [SecondView setBackgroundColor:[UIColor clearColor]]; 

     HolderView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 100, 150)]; 

     scrHorizontalScroll = [[UIScrollView alloc]initWithFrame:HolderView.frame]; 
      [scrHorizontalScroll setBackgroundColor:[UIColor redColor]]; 
     [scrHorizontalScroll setContentSize:CGSizeMake(999, 150)]; 
     [scrHorizontalScroll setScrollEnabled:YES]; 
     [HolderView addSubview:scrHorizontalScroll]; 
    [scrHorizontalScroll addSubView:FirstView]; [scrHorizontalScroll addSubView:SecondView]; [HolderView addSubView: scrHorizontalScroll]; 

//set with of the scrHorizontalScroll as second view,increase content view size to x axis.