参数类型'Future<dynamic>？ Function(String?)' 无法分配给参数类型 'DidReceiveNotificationResponseCallback?'

Question

尝试将 onSelectNotification 更新为 onDidReceiveNotificationResponse 时出现错误

  flutterLocalNotificationsPlugin.initialize(initSettings,
      onDidReceiveNotificationResponse: _onSelectNotification);

Future<dynamic>? _onSelectNotification(String? payloadNotification) {
  if (kDebugMode) {
    print("Notification selected.");
  }

  WidgetsBinding.instance.addPostFrameCallback((_) {
    if (payloadNotification != null && payloadNotification != "") {
      if (kDebugMode) {
        print(payloadNotification);
      }

      // parse notification content like this.
      // PushRequest.Message message =
      // PushRequest.Message.fromJson(jsonDecode(payloadNotification));
      //
    }
  });
  return null;
}

将其重命名为新错误时，它只是抛出此错误“参数类型“Future？Function（String？）”无法分配给参数类型“DidReceiveNotificationResponseCallback？”。”

Answer 1

onDidReceiveNotificationResponse

必须是

DidReceiveNotificationResponseCallback

类型，而您的

_onSelectNotification

不是。

DidReceiveNotificationResponseCallback

定义为：

typedef DidReceiveNotificationResponseCallback = void Function(
    NotificationResponse details);

所以你需要改变

Future<dynamic>? _onSelectNotification(String? payloadNotification) {

到

void _onSelectNotification(NotificationResponse payloadNotification) {

也许可以将其设为

Future

而不是

void

，但我对此并不完全确定。