Question

我知道强制退出application:didReceiveRemoteNotification后不会被调用（如Will iOS launch my app into the background if it was force-quit by the user?所述），但我也注意到application:handleActionWithIdentifier:也没有被召唤。我的交互式通知仍在向用户显示，但单击操作不会导致打开应用程序（例如单击通知本身）或运行application:handleActionWithIdentifier:中定义的代码。当用户选择该操作时，通知消失，给他们的印象是一切正常，而实际上他们正在做的就是解除通知。这似乎是一个相当糟糕的用户体验，所以如果iOS在不采取任何行动时继续提出通知操作，我会感到惊讶。我希望我做错了什么：

//application:didFinishLaunchingWithOptions:
UIMutableUserNotificationAction *action1;
action1 = [[UIMutableUserNotificationAction alloc] init];
[action1 setActivationMode:UIUserNotificationActivationModeBackground];
[action1 setTitle:@"Safe"];
[action1 setIdentifier:NotificationSafeActionIdent];
[action1 setDestructive:NO];
[action1 setAuthenticationRequired:NO];

UIMutableUserNotificationAction *action2;
action2 = [[UIMutableUserNotificationAction alloc] init];
[action2 setActivationMode:UIUserNotificationActivationModeBackground];
[action2 setTitle:@"Unsafe"];
[action2 setIdentifier:NotificationUnsafeActionIdent];
[action2 setDestructive:NO];
[action2 setAuthenticationRequired:NO];

UIMutableUserNotificationCategory *actionCategory;
actionCategory = [[UIMutableUserNotificationCategory alloc] init];
[actionCategory setIdentifier:NotificationCategoryIdent];
[actionCategory setActions:@[action1, action2]
                forContext:UIUserNotificationActionContextDefault];

NSSet *categories = [NSSet setWithObject:actionCategory];
UIUserNotificationType types = (UIUserNotificationTypeAlert|
                                UIUserNotificationTypeSound|
                                UIUserNotificationTypeBadge);

UIUserNotificationSettings *settings;
settings = [UIUserNotificationSettings settingsForTypes:types
                                             categories:categories];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];

//application:handleActionWithIdentifier:
if ([identifier isEqualToString:NotificationSafeActionIdent]) {
    // handle safe here including http call
} else if ([identifier isEqualToString:NotificationUnsafeActionIdent]) {
    // Handle unsafe here including http call
}

if (completionHandler) {
    completionHandler();
}

如果应用程序已强制退出，我是否遗漏了任何内容或无法从操作中调用代码。如果是这样，有一种简单的方法可以阻止动作按钮在该场景中可见？

Answer 1

正如评论者所述，applicationWillTerminate：将在用户强制退出应用时被调用。如果您在返回之前快速排队本地通知，则会显示您的消息，就像Lookout所做的那样：

- (void)applicationWillTerminate:(UIApplication *)application
{
    UILocalNotification *notification = [[UILocalNotification alloc] init];
    notification.alertBody = NSLocalizedString(@"MyAppName has terminated. Please reopen the app to enable [whatever].", @"");
    notification.soundName = UILocalNotificationDefaultSoundName;
    [application cancelAllLocalNotifications];  // Don't let these messages stack
    [application presentLocalNotificationNow:notification];
}

强制退出后不调用交互式通知处理程序

1 个答案: