微信小程序实现全国机场索引列表

本文为大家分享了微信小程序实现MUI索引列表的具体代码,供大家参考,具体内容如下

效果展示图

实现的原理

  • ‘当前选择机场'和右侧的导航栏采用的是固定定位;
  • 左侧的展示窗口的滚动采用的是scroll-view组件;
  • 选择中的字母提示是自己WXSS样式制作。

WXML

<view class="right-nav">

<view bindtap="getCurrentCode" class="{{chooseIndex == index ? '.city-list-active' : ''}}" wx:for="{{cityList}}" style="height:{{codeHeight}}px" data-code="{{item.code}}">

{{item.code}}

</view>

</view>

<view class="city-layer {{isShowLayer ? '' : 'layer-hide'}}">

{[code]}

</view>

<view class="current-choose-city">当前选择机场:{{chooseCity}}</view>

<scroll-view class="city-scroll" scroll-y="true" style="height:{{cityHeight}}px" bindscroll="scroll" scroll-top="{{scrollTop}}">

<view class="city-box" wx:for="{{cityList}}" wx:key="{{item.code}}">

<view class="city-code">{{item.code}}</view>

<view class="city-list" wx:for="{{item.cityList}}" wx:for-item="city" bindtap="getChooseCity" data-city="{{city}}">

{{city}}

</view>

</view>

</scroll-view>

WXSS

.current-choose-city{

position: fixed;

width: 100%;

height: 50px;

line-height: 50px;

padding: 0 10px;

top: 0;

left: 0;

background-color: #fff;

z-index: 10;

}

.right-nav{

width: 30px;

color: #888;

text-align: center;

position: fixed;

bottom: 0;

right: 0;

background-color: rgb(200, 200, 200);

z-index: 9;

}

.city-scroll{padding-top: 50px;}

.city-code{

background-color: #f7f7f7;

}

.city-list,.city-code{

height: 39px;

line-height: 40px;

padding: 0 30px 0 10px;

overflow: hidden;

border-bottom: 1px solid #c8c7cc;

}

.city-list-active{color:#007aff;}

/*提示点击的字母 */

.city-layer{

width: 70px;

height: 70px;

line-height: 70px;

text-align: center;

border-radius: 50%;

color: #fff;

background-color: rgba(0, 0, 0, .7);

position: fixed;

top: calc(50% - 35px);

left:calc(50% - 35px);

z-index: 11;

}

.layer-hide{display: none;}

JS

var city_list = require('./city.js');

Page({

data: {

cityList: city_list.city,

chooseCity: '您还未选择机场!',

isShowLayer: false,

chooseIndex: 0,

len: [],

code: null,

codeHeight: null,

cityHeight:null,

scrollTop: 0

},

onLoad (options) {

var windowHeight = wx.getSystemInfoSync().windowHeight;

var arr = [];

this.data.cityList.forEach(current => arr.push(current.cityList.length + 1));

this.setData({

codeHeight: (windowHeight - 50) / this.data.cityList.length,

cityHeight: windowHeight - 50,

len: arr

});

},

getCurrentCode(e){

var index = 0, sum = 0,self = this;

for (var i = 0; i < this.data.cityList.length;i++){

if (this.data.cityList[i].code === e.target.dataset.code){

index = i

break;

}

}

for (var j = 0; j < index; j++) {

sum += this.data.len[j];

}

this.setData({

code: e.target.dataset.code,

scrollTop: sum * 40,

chooseIndex: index,

isShowLayer: true

});

setTimeout(() => {

self.setData({ isShowLayer: false })

},500);

},

getChooseCity(e){

this.setData({ chooseCity: e.target.dataset.city });

}

})

总结:

在onLoad函数中设置左侧的展示高度和右侧导航每一个字母所在盒子的高度;

getCurrentCode函数是获取点击字母的index,然后进行提示以及500ms后关闭提示;

getChooseCity函数是获取选择的机场,对chooseCity进行赋值。

代码简化:

var index = 0;

for (var i = 0; i < this.data.cityList.length;i++){

if (this.data.cityList[i].code === e.target.dataset.code){

index = i

break;

}

}

简化为:

添加data-index="{{index}}",减少循环的消耗:

<view bindtap="getCurrentCode" class="{{chooseIndex == index ? '.city-list-active' : ''}}" wx:for="{{cityList}}" style="height:{{codeHeight}}px" data-code="{{item.code}}" data-index="{{index}}">

var index = e.target.dataset.index;

DEMO下载

以上是 微信小程序实现全国机场索引列表 的全部内容, 来源链接: utcz.com/z/355436.html

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