遍历array  文字。

  <view class="my_list_item">
    <view class="row">
      <view class="left">
        事件类型：
      </view>
      <view class="right">
         <picker bindchange="bindPickerChange" value="{{type_index}}" range="{{type}}">
            <view>
              {{type[type_index]}}
            </view>
          </picker>
      </view>
    </view>
  </view>
     type: ["任务", "汇报"],
    type_index: 0,
  
  
    sales_state_change(e){
        console.log('picker发送选择改变，携带值为', e.detail.value)  //这个value 就是下标，0 1 2 3 
        this.setData({
         
          sales_state_index: e.detail.value
        })
    }
  
  [object Object]

下拉遍历array  对象

<view class="my_list_item">
    <view class="row">
      <view class="left">
       用户：
      </view>
      <view class="right">
        <picker bindchange="userChange" value="{{user_select_index}}" range="{{user_array}}" range-key="trueName"  >
          <view>
            {{user_array[user_select_index].trueName}}
          </view>
        </picker>
      </view>
    </view>
  </view>
  
 
  
      user_array:[],   //所有用户
    user_select_index:0
    
    
        sales_state_change(e){
        console.log('picker发送选择改变，携带值为', e.detail.value)
        this.setData({
         
          sales_state_index: e.detail.value
        })
    }

 range-key="trueName"   是对象展示的文字，如果没有range-key 下面显示的是    object

小程序  多列 级联操作

// pages/test/test.js
Page({

    /**
     * 页面的初始数据
     */
    data: {
        multiArray: [
            ['无脊柱动物', '脊柱动物'],
            ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'],
            ['猪肉绦虫', '吸血虫']
        ],
        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'
                }
            ],
            [{
                    id: 0,
                    name: '猪肉绦虫'
                },
                {
                    id: 1,
                    name: '吸血虫'
                }
            ]
        ],
        multiIndex: [0, 0, 0],
    },
    bindMultiPickerChange: function (e) {
        console.log('picker发送选择改变，携带值为', e.detail.value)
        this.setData({
            multiIndex: e.detail.value
        })
    },
    bindMultiPickerColumnChange: function (e) {
        console.log('修改的列为', e.detail.column, '，值为', e.detail.value);
        var data = {
            multiArray: this.data.multiArray,
            multiIndex: this.data.multiIndex
        };
        data.multiIndex[e.detail.column] = e.detail.value;
        switch (e.detail.column) {
            case 0:
                switch (data.multiIndex[0]) {
                    case 0:
                        data.multiArray[1] = ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'];
                        data.multiArray[2] = ['猪肉绦虫', '吸血虫'];
                        break;
                    case 1:
                        data.multiArray[1] = ['鱼', '两栖动物', '爬行动物'];
                        data.multiArray[2] = ['鲫鱼', '带鱼'];
                        break;
                }
                data.multiIndex[1] = 0;
                data.multiIndex[2] = 0;
                break;
            case 1:
                switch (data.multiIndex[0]) {
                    case 0:
                        switch (data.multiIndex[1]) {
                            case 0:
                                data.multiArray[2] = ['猪肉绦虫', '吸血虫'];
                                break;
                            case 1:
                                data.multiArray[2] = ['蛔虫'];
                                break;
                            case 2:
                                data.multiArray[2] = ['蚂蚁', '蚂蟥'];
                                break;
                            case 3:
                                data.multiArray[2] = ['河蚌', '蜗牛', '蛞蝓'];
                                break;
                            case 4:
                                data.multiArray[2] = ['昆虫', '甲壳动物', '蛛形动物', '多足动物'];
                                break;
                        }
                        break;
                    case 1:
                        switch (data.multiIndex[1]) {
                            case 0:
                                data.multiArray[2] = ['鲫鱼', '带鱼'];
                                break;
                            case 1:
                                data.multiArray[2] = ['青蛙', '娃娃鱼'];
                                break;
                            case 2:
                                data.multiArray[2] = ['蜥蜴', '龟', '壁虎'];
                                break;
                        }
                        break;
                }
                data.multiIndex[2] = 0;
                console.log(data.multiIndex);
                break;
        }
        this.setData(data);
    },

<view class="section">
    <view class="section__title">多列选择器</view>
    <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}">
      <view class="picker">
        当前选择：{{multiArray[0][multiIndex[0]]}}，{{multiArray[1][multiIndex[1]]}}，{{multiArray[2][multiIndex[2]]}}
      </view>
    </picker>
  </view>

效果如下：

如果点击 确定 输出 下面的数据：