ios – 除了rootviewcontroller之外,无法向uiwindow添加额外的子视图

下面是来自didFinishLaunchingWithOptions的app delegate的@L_450_0@

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];

CGRect windowFrame = self.window.frame;
UIView *bottomView = [[UIView alloc] initWithFrame:CGRectMake(0,windowFrame.size.height-100,windowFrame.size.height,windowFrame.size.height)];
bottomView.BACkgroundColor = [UIColor redColor];
[self.window addSubview:bottomView];

//    self.viewController.view.frame = CGRectMake(0,windowFrame.size.width,windowFrame.size.height-100);

self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];

return YES;

我的ViewController是FreeForm,它的高度只有245左右.正如你所看到的,我试图将底部视图设为100点高度.

我只是想学习这个.

但视图总是填满整个屏幕.如果我将设置视图控制器注释为windows rootviewcontroller,我可以在屏幕上看到我的底视图.

我做错了什么？请指教.

谢谢.

self.window.rootViewController = self.viewController;

[self.window addSubview:self.viewController.view];