Question

为什么我要在AppDelegate中使用presentModalViewController？ - 处理didReceiveLocalNotification，所以我可以在我的应用程序顶部启动一个单独的modalView来处理通知

我的视图架构是什么样的？ - 使用故事板 - MainStoryBoard： - ＆gt; TabBarController-＆gt; NavigationController

发生了什么事？ - 没什么，那就是问题:-D - 当我从UILocalNotification按下操作按钮时，应用程序会打开，但只显示tabbarcontroller中的最后一个打开视图。

正如您在下面看到的，我最后的努力是在当前视图的顶部呈现modalViewController，如下所示： [self.window.rootViewController.tabBarController.selectedViewController.navigationController presentModalViewController:navigationController animated:YES];

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {



UIApplicationState state = [application applicationState];
if (state == UIApplicationStateInactive) {
    // Application was in the background when notification was delivered.
    NSLog(@"Received notification while in the background");
}
else {
    NSLog(@"Received notification while running.");
}

MedicationReminderViewController *controller = [[UIStoryboard storyboardWithName:@"ModalStoryBoard" bundle:nil] instantiateViewControllerWithIdentifier:@"MedicationReminderVC"];

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.window.rootViewController.tabBarController.selectedViewController.navigationController presentModalViewController:navigationController animated:YES];

UIApplicationState state = [application applicationState]; if (state == UIApplicationStateInactive) { // Application was in the background when notification was delivered. NSLog(@"Received notification while in the background"); } else { NSLog(@"Received notification while running."); } MedicationReminderViewController *controller = [[UIStoryboard storyboardWithName:@"ModalStoryBoard" bundle:nil] instantiateViewControllerWithIdentifier:@"MedicationReminderVC"]; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:controller]; [self.window.rootViewController.tabBarController.selectedViewController.navigationController presentModalViewController:navigationController animated:YES];

更新

似乎这是零： }

解决方案

[self.window.rootViewController presentModalViewController：navigationController animated：YES];

Answer 1

试试这个：

[self.window.rootViewController presentModalViewController:controller
                                                  animated:YES];

Answer 2

您是否尝试过以下操作？

[self.window.rootViewController.tabBarController.selectedViewController presentModalViewController:navigationController animated:YES];

那就是说，即使这样有效，我也会强烈建议你重新考虑你的设计选择，以避免这样做。以这种方式遍历导航堆栈以访问东西会变得非常混乱，我强烈反对它。

为什么我的presentModalViewController无法在AppDelegate中运行？

2 个答案: