if (IOS_VERSION >= 10.0) {
  UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
  center.delegate = self;
  [center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert) completionHandler:^(BOOL granted, NSError * _Nullable error) {
   if (!error) {
    DLog(@"request authorization succeeded!");
   }
  }];
 } else {
  if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
   //IOS8，创建UIUserNotificationSettings，并设置消息的显示类类型
   UIUserNotificationSettings *notiSettings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound) categories:nil];
 
   [application registerUserNotificationSettings:notiSettings];
  }
 }