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从appDelegate呈现ViewController

appdelegate viewcontroller objective-c ios

Marcos Curvello · 技术社区 · 11 年前

每次应用程序来自applicationDidEnterBackground方法的后台时,我都需要从appDelegate中显示ViewController。

*securityCheck提示用户输入密码,这与iOS中的正常密码非常相似。验证密码后,我在securityCheck中调用dimissViewControllerAnimated,剩下的是空白的UINavigationController,因为视图是从appDelegate中显示的,我没有显示视图的记录,因此无法打开RootViewController。

我的问题是如何正确地关闭SecurityCheckViewController,以便它显示用户在应用程序进入后台之前所使用的ViewController。

这是我的代码:

此方法在AppDelegate.m中调用

- (void)securityCheck {

   SecurityCheckViewController *securityCheck = [[SecurityCheckViewController alloc] init];
   UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:securityCheck];

   [securityCheck presentedByAppDelegate:YES];

   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   [self.window setRootViewController:navigationController];
   [self.window makeKeyAndVisible];
}

然后在SecurityCheckViewController.m中

- (void)unlockWasSuccessfulForPadLockScreenViewController:(ABPadLockScreenViewController *)padLockScreenViewController {

    [self.appDelegate securityCheckDone];
    [padLockScreenViewController dismissViewControllerAnimated:YES completion:nil];

     NSLog(@"Sucsessfull Unlock");I'm 
}

2 回复 | 直到 11 年前

meda 11 年前

目前

- (void)securityCheck {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil];
    SecurityCheckViewController *securityCheck = [storyboard instantiateViewControllerWithIdentifier:@"securityCheckView"];
    [self.window.rootViewController presentViewController:securityCheck animated:NO completion:nil];
}

不予考虑

[self dismissViewControllerAnimated:YES completion:nil];

Wayne 8 年前

你可以从 应用程序:didFinishLaunchingWithOptions

注: 属性检查器上的所有故事板“initialViewControllers”复选框都已关闭

    UIStoryboard *storyboard = 
        [UIStoryboard storyboardWithName:@"Registration" bundle:nil];

    RegisterViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"RegisterViewController"];

    //this is key else you get a black screen
    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];

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