微信小程序多列选择器range-key使用详解

<picker mode="multiselector" bindchange="bindmultipickerchange2" bindcolumnchange="bindmultipickercolumnchange2" value="{{multiindex}}" range="{{objectmultiarray}}" range-key="{{'name'}}">
 <view class="picker">
  当前选择：{{objectmultiarray[0][multiindex2[0]].name}}，{{objectmultiarray[1][multiindex2[1]].name}}
 </view>
</picker>

page({

 /**
 * 页面的初始数据
 */
 data: {
 objectmultiarray: [
  [
  {
   id: 0,
   name: '无脊柱动物'
  },
  {
   id: 1,
   name: '脊柱动物'
  }
  ], [
  {
   id: 0,
   name: '扁性动物'
  },
  {
   id: 1,
   name: '线形动物'
  },
  {
   id: 2,
   name: '环节动物'
  },
  {
   id: 3,
   name: '软体动物'
  },
  {
   id: 3,
   name: '节肢动物'
  }
  ]
 ],
 multiindex2: [0, 0],
 },


 bindmultipickerchange2: function (e) {
 console.log('picker发送选择改变，携带值为', e.detail.value)
 this.setdata({
  multiindex2: e.detail.value
 })
 },
 bindmultipickercolumnchange2: function (e) {
 console.log('修改的列为', e.detail.column, '，值为', e.detail.value);
 var data = {
  objectmultiarray: this.data.objectmultiarray,
  multiindex2: this.data.multiindex2
 };
 data.multiindex2[e.detail.column] = e.detail.value;
 switch (e.detail.column) {
  case 0:
  switch (data.multiindex2[0]) {
   case 0:
   data.objectmultiarray[1] = [
    { id: 0, name: '扁性动物' },
    { id: 1, name: '线形动物' },
    { id: 2, name: '环节动物' },
    { id: 3, name: '软体动物' },
    { id: 3, name: '节肢动物' }
   ];
   // data.multiarray[2] = ['猪肉绦虫', '吸血虫'];
   break;
   case 1:
   data.objectmultiarray[1] = [
    { id: 0, name: '鱼' },
    { id: 1, name: '线形两栖动物' },
    { id: 2, name: '爬行动物' }
   ];
   break;
  }
  data.multiindex2[1] = 0;
  // data.multiindex[2] = 0;
  break;
 }
 this.setdata(data);
 }


})