如何防止UIScrollview中嵌入的UIView被剪輯

Question

我有一個iPad UIView子類（我們將調用LargerUIView），我通過drawRect做了一堆繪圖：一次詢問。這一切似乎都在工作，而且看起來像我喜歡的方式。我現在正試圖進行滾動工作（只是在水平上開始），但當我嘗試滾動時，下面顯示的是黑色（即，似乎從未繪製過）。這並不令我感到意外，因爲它可能已被剪輯。尋找建議。下面是我在做什麼至今：

MyAppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  

    CGRect scrollRect = CGRectMake(0, 0, 768, 1024); 
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:scrollRect]; 

    LargerUIView *view = (LargerUIView *)[viewController view]; 
    [scrollView addSubview:view]; 

    [scrollView setContentSize:CGSizeMake(768, pageHeight)]; 
    [scrollView setContentMode:UIViewContentModeRedraw]; 
    [scrollView setClipsToBounds:YES]; 

    [window addSubview:scrollView]; 
    [scrollView release]; 

    // Without this next line, the "frontmost" (ie, most recently added subview) 
    // is the target uiview - which is not equipped to handle scrolling/UIEvents 
    [window sendSubviewToBack:view]; 

    // Show it all. 
    [window makeKeyAndVisible]; 

    return YES; 
} 

有什麼建議？已嘗試將「setClipsToBounds」更改爲NO。

Answer 1

感嘆。多麼愚蠢。在InterfaceBuilder中，LargerUIView設置得更小。忘了添加這樣一行：

[view setBounds:CGRectMake(0, 0, 768, pageHeight)]; 

糟糕。