我有一个 iPad UIView 子类(我们将调用 LargerUIView),我通过 drawRect 进行一堆绘图:一旦被问到。这一切似乎都在起作用,并且看起来像我喜欢的那样。我现在正试图让滚动工作(只是在水平开始),但是当我尝试滚动时,下面显示的是黑色(即,似乎从未绘制过)。这并不让我感到惊讶,因为它可能被剪掉了。寻找建议。到目前为止,这是我正在做的事情:
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;
}
有什么建议么?也尝试将“setClipsToBounds”更改为 NO。