Question

我有一个没有xib文件的CSRootViewController:UIViewController，一个带有xib文件的CSFirstViewController:CSRootViewController。对于波纹管代码，我会收到错误：

“应用程序窗口应该有一个根视图控制器应用程序启动结束“

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    CSFirstViewController *firstViewController = [[CSFirstViewController alloc] init];
    self.window.rootViewController = firstViewController;
    [self.window makeKeyAndVisible];

    return YES;
}

更新

以下是CSFirstViewController'代码。 .h文件：

@interface CSFirstViewController : CSRootViewController

@end

和.m文件

@interface CSFirstViewController ()

- (IBAction)pushButtonClicked:(id)sender;

@end

@implementation CSFirstViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - IBAction methods

- (IBAction)pushButtonClicked:(id)sender
{
    CSSecondViewController *secondVC = [[CSSecondViewController alloc] init];
    [self.rootViewController pushCSViewController:secondVC animated:YES];
}

@end

任何人都可以指出原因吗？

Answer 1

我找到了解决问题的方法。只需在设置窗口[self.window addSubview:firstViewController.view];后添加rootViewController即可。但我仍然不知道为什么会这样。

UIWindow rootViewController无法找到UIViewController子类

更新

1 个答案: