如何在Flutter中更新本地JSON字段 [英] How to update the local json field in flutter

问题描述

我是扑朔迷离的飞镖新手，我阅读了很多网络文章和文档，但无法弄清楚如何更新JSON字段，我有一个本地JSON文件，例如

I am new to flutter and dart I read a lot of web article and documentation but didn't able to figure out how to update JSON field I have a local JSON file like

 {
"category": "Happiness",
"quotes":[
  {
  "quote":"I hope you will find a reason to smile",
  "favorite":false
  },
  {
  "quote":"Sometimes your joy is the source of your smile, but sometimes your smile can be the source of your joy.",
  "favorite":false
  }]}

我想将JSON文件中的已归档收藏夹更新为true

I want to update the filed favorite to true in JSON file Is there any way to do this

推荐答案

您可以使用以下方法。按下按钮后，收藏夹字段将更改为 true 。

You can use the following method. The field favorite is changed to true when the button is pressed.

FlatButton(
    child: Text('Add Favourite'),
    onPressed: (){
         myJson['quotes'][myIndex]['favorite'] = true;
})

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