objective-c - 如何在 Cocoa 中将 View Controller 设置为 Root View ？

Question

我有一个 AppDelegate 和 mainWindow.xib。我创建了另一个 viewController 并从 AppDelegate 调用，它运行良好。现在我怀疑是否可以将 View Controller 设置为根而不将其添加到 mainWindow.xib。是否必须用mainWindow.xib加载我们的 View ？

我这样调用 View Controller

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    self.view = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    [self.window.contentView addSubview:self.view.view];
    self.view.view.frame = ((NSView*)self.window.contentView).bounds;
}

Answer 1

尝试使用

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

    self.viewControllerObj = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.rootViewController = self.viewControllerObj;

    [self.window makeKeyAndVisible];
    return YES;

}