Flutter：未處理的異常：類型“（動態）=> void”不是“動作”類型“（字符串，動態）=> void”的子類型

Question

完全錯誤：

`E/flutter (15265): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] 未處理的異常：類型“（動態）=> void”不是類型“（字符串，動態）=> 'action' 無效' E/flutter (15265): #0 OrderController.getOrderDetails (package:mart/controller/order_controller.dart:117:23) E/flutter (15265): E/flutter (15265): D/ViewRootImplMainActivity : windowFocusChanged hasFocus=false inTouchMode=true

錯誤：

Future<List<OrderDetailsModel>> getOrderDetails(String orderID) async {
    _orderDetails = null;
    _isLoading = true;
    _showCancelled = false;

    if(_trackModel == null || _trackModel.orderType != 'parcel') {
      Response response = await orderRepo.getOrderDetails(orderID);
      _isLoading = false;
      if (response.statusCode == 200) {
        _orderDetails = [];
        response.body.forEach((orderDetail) => _orderDetails.add(OrderDetailsModel.fromJson(orderDetail)));
      } else {
        ApiChecker.checkApi(response);
      }
    }else {
      _isLoading = false;
      _orderDetails = [];
    }

更新

void _loadData(BuildContext context, bool reload) async {
    await Get.find<OrderController>().trackOrder(widget.orderId.toString(), reload ? null : widget.orderModel, false);
    if(widget.orderModel == null) {
      await Get.find<SplashController>().getConfigData();
    }
    Get.find<OrderController>().getOrderDetails(widget.orderId.toString());
  }

Answer 1

您的問題出現在 getOrderDetails 中的 forEach 中，您的操作方式錯誤。您的 json 響應是 map 和 map 具有key , value屬性

response.body.forEach((key, value) => _orderDetails.add(OrderDetailsModel.fromJson(value)));