UserNotification未显示（iOS 10）
我无法在iOS 10中UserNotification 。我将从我的代码开始：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; UNAuthorizationOptions options = (UNAuthorizationOptionBadge | UNAuthorizationOptionAlert | UNAuthorizationOptionSound); center.delegate = self; [center requestAuthorizationWithOptions: options completionHandler: ^(BOOL granted, NSError * _Nullable error) { if (granted) { NSLog(@"Granted notifications!"); } }]; //
这工作，我看到日志。
那么，我有：
-(void)application: (UIApplication *)application performFetchWithCompletionHandler: (void (^)(UIBackgroundFetchResult))completionHandler { // UNMutableNotificationContent *content = [UNMutableNotificationContent new]; content.title = NSLocalizedString(@"Updates are available", nil); UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval: 1 repeats: NO]; UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier: @"IDLocalNotification" content: content trigger: trigger]; UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; [center addNotificationRequest: request withCompletionHandler: ^(NSError * _Nullable error) { if (!error) { NSLog(@"Notification was requested!"); } }];
再次，这工作，我看到日志。
但我没有看到通知出现在我的屏幕上（触发延迟只有1秒，但我尝试了更大的值）。
此外， willPresentNotification委托方法永远不会到达。
我错过了什么？
发现问题。
事实certificate，我需要设置内容的body ，而不仅仅是title ：
UNMutableNotificationContent *content = [UNMutableNotificationContent new]; content.body = [NSString localizedUserNotificationStringForKey: @"Updates are available" arguments: nil];
我甚至可以离开title ，它的作品。