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我已经声明我的类也符合 UNUserNotificationCenterDelegate，我在 didFinishLaunchingWithOptions 中将所述类声明为当前的 UNNotificationCenter 委托。

但是，无论我做什么，我都无法在我的自定义操作中收到对方法 userNotificationCenter didReceiveNotificationResponse 的回调。代码附在下面。

有效的事情： - 能够很好地看到通知 - 能够点击按钮启动应用程序确实可以启动应用程序

没有的事情： - 能够单击按钮测试，它只是关闭通知，它不调用方法 userNotificationCenter didReceiveNotificationResponse

UNUserNotificationCenter *notificationCenter = [UNUserNotificationCenter currentNotificationCenter];

NSDate *now = [[NSDate alloc]init];
NSDate *inABit = [now dateByAddingTimeInterval:10];

NSDateComponents *components = [[NSCalendar currentCalendar] components: NSCalendarUnitSecond | NSCalendarUnitMinute | NSCalendarUnitHour | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate:inABit];

UNCalendarNotificationTrigger *calendarTrigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:NO];

//register category

UNNotificationAction *test = [UNNotificationAction actionWithIdentifier:@"test" title:@"Test" options:@[]];
UNNotificationAction *launchApp = [UNNotificationAction actionWithIdentifier:@"launchApp" title:@"Launch App" options:UNNotificationActionOptionForeground];
UNNotificationCategory *category = [UNNotificationCategory categoryWithIdentifier:@"notification" actions:@[test, launchApp] intentIdentifiers:@[] options:UNNotificationCategoryOptionNone];
[notificationCenter setNotificationCategories:[NSSet setWithObject:category]];

//schedule notification
UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc]init];
[content setTitle:@"Hello"];
[content setBody:@"Hello notification!"];
[content setCategoryIdentifier:@"notification"];
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"request" content:content trigger:calendarTrigger];

[notificationCenter addNotificationRequest:request withCompletionHandler:
 ^(NSError *error){
     if(error!=nil)
     {
         NSLog(@"There was an error adding a notification request.");
     }
 }];

当然，我已经实现了方法（userNotificationCenter didReceiveNotificationResponse），我只是不想在这里显示它，因为它占用空间。该方法执行 NSLog 并在 10 秒后安排另一个通知。所有这些都不会发生，因为没有调用该方法。

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