How to use the three-level linkage selector in WeChat mini program
This article mainly introduces in detail how to use the three-level linkage selector of the WeChat applet. It has a certain reference value. Interested friends can refer to it.
The examples in this article are shared with you. The specific code of the three-level linkage selector of the WeChat applet is for your reference. The specific content is as follows
Rendering
Implementation principle
Use the picker component of the WeChat applet, among which:
1, ordinary selector: mode = selector to implement a first-level selection instance;
2, province and city selector ：mode = region realizes the third-level linkage of provinces and municipalities;
3, multi-column selector: mode = multiSelector realizes the multiplication of numbers within 10 for the second-level and third-level linkage.
WXML
<view class="tui-picker-content">
<view class="tui-picker-name">一级选择实例</view>
<picker bindchange="changeCountry" value="{{countryIndex}}" range="{{countryList}}">
<view class="tui-picker-detail">{{countryList[countryIndex]}}</view>
</picker>
</view>
<view class="tui-picker-content">
<view class="tui-picker-name">省市区三级联动选择</view>
<picker bindchange="changeRegin" mode = "region" value="{{region}}">
<view class="tui-picker-detail">{{region[0]}} - {{region[1]}} - {{region[2]}}</view>
</picker>
</view>
<view class="tui-picker-content">
<view class="tui-picker-name">自定义二级联动选择</view>
<picker bindchange="changeMultiPicker" mode = "multiSelector" value="{{multiIndex}}" range="{{multiArray}}">
<view class="tui-picker-detail">
{{multiArray[0][multiIndex[0]]}} * {{multiArray[1][multiIndex[1]]}} = {{multiArray[0][multiIndex[0]] * multiArray[1][multiIndex[1]]}}
</view>
</picker>
</view>
<view class="tui-picker-content">
<view class="tui-picker-name">自定义三级联动选择</view>
<picker bindchange="changeMultiPicker3" mode = "multiSelector" value="{{multiIndex3}}" range="{{multiArray3}}">
<view class="tui-picker-detail">
{{multiArray3[0][multiIndex3[0]]}} * {{multiArray3[1][multiIndex3[1]]}} * {{multiArray3[2][multiIndex3[2]]}} = {{multiArray3[0][multiIndex3[0]] * multiArray3[1][multiIndex3[1]] * multiArray3[2][multiIndex3[2]]}}
</view>
</picker>
</view>WXSS
page{background-color: #efeff4;}
.tui-picker-content{
padding: 30rpx;
text-align: center;
}
.tui-picker-name{
height: 80rpx;
line-height: 80rpx;
}
.tui-picker-detail{
height: 80rpx;
line-height: 80rpx;
background-color: #fff;
font-size: 35rpx;
padding: 0 10px;
overflow: hidden;
}JS
Page({
data: {
// 普通选择器列表设置,及初始化
countryList: ['中国','美国','英国','日本','韩国','巴西','德国'],
countryIndex: 6,
// 省市区三级联动初始化
region: ["四川省", "广元市", "苍溪县"],
// 多列选择器(二级联动)列表设置,及初始化
multiArray: [[1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9]],
multiIndex: [3,5],
// 多列选择器(三级联动)列表设置,及初始化
multiArray3: [[1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9], [1, 2, 3, 4, 5, 6, 7, 8, 9]],
multiIndex3: [3, 5, 4]
},
// 选择国家函数
changeCountry(e){
this.setData({ countryIndex: e.detail.value});
},
// 选择省市区函数
changeRegin(e){
this.setData({ region: e.detail.value });
},
// 选择二级联动
changeMultiPicker(e) {
this.setData({multiIndex: e.detail.value})
},
// 选择三级联动
changeMultiPicker3(e) {
this.setData({ multiIndex3: e.detail.value })
}
})Summary
1. Due to the WeChat applet The picker component only provides a separate time selector and date selector. In actual development, we may need to select date and time at the same time. The component is not comprehensive enough, so when making a date selector, you need to pay attention;
2. Solve the date and time The method of combining time selectors is implemented using multi-column selectors;
3. Since the data of the multi-column selector uses a two-dimensional array, the linkage effect cannot be directly achieved and the data needs to be judged and processed.
Reasonable use of multi-column selectors can be achieved by the other four selectors provided by the picker component!
The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
PHP closures and anonymous functions (detailed tutorial)
About custom events in Vue components (detailed Tutorial)
How to use JS to realize that the ball follows the movement of the mouse
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