<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);
 }


})