APNS 无法获取 DeviceToken答案

【问题标题】：APNS can't get DeviceTokenAPNS 无法获取 DeviceToken
【发布时间】：2023-03-13 20:00:01
【问题描述】：

我的代码。

UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
        center.delegate                  = self;
        [center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert) completionHandler:^(BOOL granted, NSError * _Nullable error) {
            if (!error) {
                NSLog(@"~ios10-----");
                dispatch_async(dispatch_get_main_queue(), ^{
                    [[UIApplication sharedApplication] registerForRemoteNotifications];
                });

            }else{
                NSLog(@"~ios10---error--");
            }
        }];

此代码在 iPhone 5s ios 11.4.1 中有效，调用了 didRegisterForRemoteNotificationsWithDeviceToken 方法。但在 iPhone 6s ios 13.5.0 中不起作用。经过几天的谷歌搜索，APNS connection failure 找到了解决方案，解决方法是在 wifi 设置中更改手机以使用替代 DNS，如 Google (8.8.8.8) 或 Cloudflare (1.1.1.1)。但是我不能修改用户手机的DNS。

如果您有任何想法，请告诉我。谢谢

【问题讨论】：

标签： ios dns apple-push-notifications devicetoken

【解决方案1】：

你可以试试这个，希望对你有帮助。

if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_9_x_Max) {
          UIUserNotificationType allNotificationTypes =
          (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
          UIUserNotificationSettings *settings =
          [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
          [application registerUserNotificationSettings:settings];
      } else {
          // iOS 10 or later
  #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
          // For iOS 10 display notification (sent via APNS)
          [UNUserNotificationCenter currentNotificationCenter].delegate = self;
          UNAuthorizationOptions authOptions =
          UNAuthorizationOptionAlert
          | UNAuthorizationOptionSound
          | UNAuthorizationOptionBadge;
          [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:authOptions completionHandler:^(BOOL granted, NSError * _Nullable error) {
          }];
  #endif
      }

【讨论】：