本篇介绍如何使用object数组实现三级联动。(微信官方文档并没明确给出使用方法 -.-'')
picker实现三级联动
实现效果如下,切换列表时,数据相应改变
切换列后
wxml:
<picker mode="multiSelector" bindchange="bindPickerChange" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}" range-key="{{'name'}}">
<view class="picker">
当前选择:{{multiArray[0][multiIndex[0]].name}},{{multiArray[1][multiIndex[1]].name}},{{multiArray[2][multiIndex[2]].name}}
</view>
</picker>
js:
// pages/home/home.js
//定义三列数组数据,方便动态交互
let multiArray0 = [
{
id: 0,
name: '无脊柱动物'
},
{
id: 1,
name: '脊柱动物'
}
];
let multiArray1 = [
{
id: 0,
name: '扁性动物'
},
{
id: 1,
name: '线形动物'
},
{
id: 2,
name: '环节动物'
}
];
let multiArray2 = [
{
id: 0,
name: '猪肉绦虫'
},
{
id: 1,
name: '吸血虫'
}
];
Page({
/**
* 页面的初始数据
*/
data: {
multiArray: [multiArray0, multiArray1, multiArray2],//封装obj
multiIndex: [0, 0, 0],
},
bindPickerChange: function (e) {
console.log('picker发送选择改变,携带值为', e.detail.value)
this.setData({
index: 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;
//判断当前滑动第几列
switch (e.detail.column) {
//第一列(无脊椎动物)
case 0:
switch (data.multiIndex[0]) {
case 0:
//0时使用默认数据
data.multiArray[1] = multiArray1;
data.multiArray[2] = multiArray2;
break;
case 1:
//1时使用新数据,也可通过wx.request请求数据进行替换
let list2_1 = [{ id: 0, name: '鱼' }, { id: 1, name: '两栖动物' }]
let list2_2 = [{ id: 0, name: '鲫鱼' }, { id: 0, name: '带鱼' }]
data.multiArray[1] = list2_1;
data.multiArray[2] = list2_2;
break;
}
data.multiIndex[1] = 0;
data.multiIndex[2] = 0;
break;
//第二列(扁性动物)
case 1:
switch (data.multiIndex[0]) {
case 0:
switch (data.multiIndex[1]) {
case 0:
//0时使用默认数据
data.multiArray[2] = multiArray2;
break;
case 1:
let list2_4 = [{ id: 0, name: '蚂蚁' }]
data.multiArray[2] = list2_4;
break;
case 2:
let list2_5 = [{ id: 0, name: '河蚌' }]
data.multiArray[2] = list2_5;
break;
}
break;
case 1:
switch (data.multiIndex[1]) {
case 0:
let list2_7 = [{ id: 0, name: '蛞蝓' }]
data.multiArray[2] = list2_7;
break;
case 1:
let list2_8 = [{ id: 0, name: '昆虫' }]
data.multiArray[2] = list2_8;
break;
}
break;
}
data.multiIndex[2] = 0;
console.log(data.multiIndex);
break;
}
this.setData(data);
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function (options) {
},
})
直接引用代码,可直接进行自己的定制化操作 ~^_^~