Nativescript 下拉插件只显示 Object 对象而不是值

Nativescript drop down plugin display only Object object instead of value

我正在尝试在下拉列表中显示对象值,并希望在 select 任何值时获取整个对象值。我该如何设置?

我正在尝试使用“.”访问要显示的对象值。运算符如下

<dd:DropDown items="{{ raw_material_list.productName }}" selectedIndex="{{ raw_material_index }}" opened="dropDownOpened" closed="dropDownClosed" selectedIndexChanged="dropDownSelectedIndexChanged" class="dropDownStyle" />

我传递的数据如下

raw_material_list = [
     {
       "id": "44",
       "created_date": "2019-04-19 12:01:13",
       "activeFlag": "true",
       "productType": "purchase",
       "productName": "suraksha",
     },
     {
       "id": "43",
       "created_date": "2019-04-19 11:59:59",
       "activeFlag": "true",
       "productType": "purchase",
       "productName": "vajra",
     }
   ];

我需要得到与我提到的完全一样的结果,欢迎任何帮助。

我更新了你的游乐场here

在 drop-down-common.js

中将 display 更改为 productName
ValueList.prototype.getDisplay = function (index) {
        if (types.isNullOrUndefined(index)) {
            return null;
        }
        if (index < 0 || index >= this.length) {
            return "";
        }
        return this._array[index].productName;
    };

P.S。您必须对对象使用 ValueList

上面的答案是正确的,但是对于这个问题,非常简单直接的解决方案是

var nativescript_drop_down_1 = require("../nativescript-drop-down") //Plugin

1> modify the array list like below

raw_material_list = new nativescript_drop_down_1.ValueList([
     {
       "id": "44",
       "created_date": "2019-04-19 12:01:13",
       "activeFlag": "true",
       "productType": "purchase",
       "productName": "suraksha",
     },
     {
       "id": "43",
       "created_date": "2019-04-19 11:59:59",
       "activeFlag": "true",
       "productType": "purchase",
       "productName": "vajra",
     }
   ]);

2>to access data 

let obj = viewModel.get("raw_material_list")._array[viewModel.get("raw_material_index")];

      console.log("----obj-----");
      console.log(obj);