ios - APNs 在 iOS 8.0 和更高版本中使用 UIUserNotificationSettings 时不起作用

Question

我实际上正在为 iPhone 和 iPad 开发应用。

我正在实现 APNs，它适用于 iOS < 8.0。在 Stackoverflow 中查找，我发现了很多关于它的问题以及为 iOS 8.0 和更高版本实现 APNs 的方法，我只是按照这个步骤。

我的代码是:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  [self registerForRemoteNotification];
  return YES;
}

- (void)registerForRemoteNotification 
{
  if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {

    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:
                                        UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
  } else {
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
  }
}

#ifdef __IPHONE_8_0
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
{
   //register to receive notifications
   [application registerForRemoteNotifications];
   NSLog(@"Active notifications: %@", [[UIApplication sharedApplication] currentUserNotificationSettings]);
}
#endif

当我检查事件通知时，它会返回“UIUserNotificationSettings: 0x156c03e0; types: (none);”我不明白为什么，日志仍然显示“正在尝试标记应用程序图标，但尚未收到用户的许可以标记该应用程序”。

Answer 1

您缺少 iOS8 的行代码:

[[UIApplication sharedApplication] registerForRemoteNotifications];

像这样:

if ([application respondsToSelector: selector (registerUserNotificationSettings :)]) {
      UIUserNotificationSettings * settings = [UIUserNotificationSettings settingsForTypes: UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound
                                                                               categories: nil ];
       [[UIApplication sharedApplication] registerUserNotificationSettings: settings];
       [[UIApplication sharedApplication] registerForRemoteNotifications];
   } else {
       [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
        UIRemoteNotificationTypeBadge |
        UIRemoteNotificationTypeAlert |
        UIRemoteNotificationTypeSound];

   }