微信小程序更新二维数组中的对象或数组的属性值

更新二维数组中的某个对象的属性值，代码如下

js 代码

data: {
    familys:[
      {
        familyName:贾家, 
        users: [
          {name:贾宝玉},
          {name:贾元春},
          {name:贾迎春},
          {name:贾探春},
          {name:贾惜春}
        ]
      },
      { 
        familyName:王家, 
        users: [
          {name:王熙凤},
          {name:王夫人},
          {name:薛姨妈}
        ]
      },
      {
        familyName:薛家, 
        users: [
          {name:薛宝钗},
          {name:薛蟠},
          {name:薛宝琴}
       ]
      },
      {
        familyName:史家, 
        users: [
          {name:贾母},
          {name:史湘云}
        ]
      }
    ]
  },

  updateUser() {
    let f = familys[ + 0 + ].familyName;
    this.setData({
      [f]:江南甄家
    })
  },

核心处在于定义一个变量，把要修改的 familys[0].familyName 以字符串形式拼接起来

wxml 代码

<view>
  <view wx:for="{
         
  {familys}}" wx:key="*this">
    <view>
      <text>{
         
  {item.familyName}}</text>
      <view></view>
      <text wx:for="{
         
  {item.users}}" wx:for-item="userItem" wx:key="userItem">
        <text>{
         
  {userItem.name}}</text>
        <text>,</text>
      </text>
    </view>
  </view>

  <view>
   <button bindtap="updateUser">更新</button>
  </view>
</view>

运行效果如下图

更新数组中的数组的属性值

js 代码

data: {
    familys:[
      {
        familyName:贾家, 
        users: [
          {name:贾宝玉},
          {name:贾元春},
          {name:贾迎春},
          {name:贾探春},
          {name:贾惜春}
        ]
      },
      { 
        familyName:王家, 
        users: [
          {name:王熙凤},
          {name:王夫人},
          {name:薛姨妈}
        ]
      },
      {
        familyName:薛家, 
        users: [
          {name:薛宝钗},
          {name:薛蟠},
          {name:薛宝琴}
       ]
      },
      {
        familyName:史家, 
        users: [
          {name:贾母},
          {name:史湘云}
        ]
      }
    ]
  },

  updateUser() {

    let f = familys[ + 0 + ].users[+ 0 +].name
    this.setData({
      [f]: 甄宝玉
    })
  },

思路和上边一样，用拼接字符串的形式

wxml 代码

<view>
  <view wx:for="{
         
  {familys}}" wx:key="*this">
    <view>
      <text>{
         
  {item.familyName}}</text>
      <view></view>
      <text wx:for="{
         
  {item.users}}" wx:for-item="userItem" wx:key="userItem">
        <text>{
         
  {userItem.name}}</text>
        <text>,</text>
      </text>
    </view>
  </view>

  <view>
   <button bindtap="updateUser">更新</button>
  </view>
</view>

运行效果如下图