js代码
Page({
/** * 页面的初始数据 */ data: { objectMultiShow: [], objectMultiArray: [], multiArray: [], multiIndex: [], checkeIndex: [] },
/** * 生命周期函数--监听页面加载 * objectMultiShow--匹配多列选择器渲染数据所对应的json数据（包含id，parentId，name） * multiArray--多列选择器渲染数据 */ onLoad: function(options) { // 初始化 let data = { objectMultiShow: this.data.objectMultiShow, objectMultiArray: this.data.objectMultiArray, multiArray: this.data.multiArray, multiIndex: this.data.multiIndex, checkeIndex: this.data.checkeIndex } data.objectMultiArray = [ [ { parentKey: 7, key: 26, name: "智慧大厦" }], [{ parentKey: 26, key: 27, name: "9F" }, { parentKey: 26, key: 28, name: "12F" }, { parentKey: 26, key: 29, name: "15F" },
{ parentKey: 26, key: 30, name: "11F" } ]， [{ parentKey:29, key: 31, name: "1501F" }, { parentKey: 29, key: 32, name: "1502F" }, { parentKey: 29, key: 33, name: "1503F" },
{ parentKey: 29, key: 34, name: "1504F" } ]
] data.objectMultiShow = data.objectMultiArray.map((item, index) => { if (index > 0) { item = item.filter(i => i.parentKey === data.objectMultiArray[index - 1][0].key) } return item }) data.multiArray = data.objectMultiShow.map(item => { item = item.map(i => i.name) return item }) console.log(data.multiIndex) // 数据更新 this.setData(data) },
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); // 初始化数据 var data = { objectMultiShow: this.data.objectMultiShow, multiArray: this.data.multiArray, multiIndex: this.data.multiIndex };
// 改变第i列数据之后，后几列选择第0个选项（重置） data.multiIndex[e.detail.column] = e.detail.value; for (let i = e.detail.column; i < data.multiIndex.length - 1; i++) { data.multiIndex[i + 1] = 0 }
/** * 改变第i列数据之后，后几列数据更新 * 两种写法：for 和 switch，switch为三列选择器写法，for由switch精简拓展过来，可用于多列选择器 * swich写法：如果更改的是第一列数据，第二列数据通过filter筛选（parentId = 第一列选中项id），同时更新第三列数据 * 如果更改的是第二列数据，更新第三列数据 通过filter筛选（parentId = 第二列选中项id） */ let arry = this.data.objectMultiArray for (let i = e.detail.column; i < data.multiIndex.length - 1; i++) { data.objectMultiShow[i + 1] = arry[i + 1].filter(item => item.parentKey === data.objectMultiShow[i][data.multiIndex[i]].key) data.multiArray[i + 1] = data.objectMultiShow[i + 1].map(item => item.name) } /*switch (e.detail.column) { case 0: data.objectMultiShow[1] = arry[1].filter(item => item.parentId === data.objectMultiShow[0][data.multiIndex[0]].id) data.multiArray[1] = data.objectMultiShow[1].map(item => item.name) data.objectMultiShow[2] = arry[2].filter(item => item.parentId === data.objectMultiShow[1][data.multiIndex[1]].id) data.multiArray[2] = data.objectMultiShow[2].map(item => item.name) break; case 1: data.objectMultiShow[2] = arry[2].filter(item => item.parentId === data.objectMultiShow[1][data.multiIndex[1]].id) data.multiArray[2] = data.objectMultiShow[2].map(item => item.name) }*/ // 数据更新 this.setData(data); } })
wxml代码：
<view class="container"> <form catchsubmit="formSubmit"> <view class="form-card"> <view class="weui-cell weui-cell_input"> <view class="weui-cell__hd"> <view class="weui-label">楼<span>*</span></view> </view> <view class="weui-cell__bd"> <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}"> <view class="weui-input">选择：{{multiArray[0][multiIndex[0]]}}{{multiArray[1][multiIndex[1]]}}{{multiArray[2][multiIndex[2]]}}</view> </picker> </view> </view> </view> </form> </view>
