首页 编程 Javascript

小程序实现多选框功能

2018-10-30 21 wxfdpp

最近写小程序的时候，遇到多选框的问题！并不是多选框不好操作，而是小程序的多选框实在太丑了好吗！本来的初衷是想修改一下默认样式就OK了，从边框 宽度 到背景 却在最后选择出来的额icon上无从下手！没办法自己手写checked的效果采用的是icon图标。感兴趣的可以往下看看！

先来看看效果图

小程序实现多选框功能

实现的原理也非常的简单，数据渲染到列表，绑定事件修改列表项的checked属性，不建议直接操作data的数据，当要操作的时候可以定义一个局部变量，局部操作完成后，在赋值给data，利用数据双向绑定的特性，就完成所有的操作

wxml

<view class='header1'>
 <view class='header'>
  <view class='header_con flex_between'>
   <view class='left'>
    共计{{items.length}}件商品
   </view>
   <view class='right flex_end'>
    <view wx:if="{{!management_good}}" class='flex_center' bindtap='management'>
     管理
    </view>
    <view wx:if="{{management_good}}" class='flex_center' bindtap='finish_management'>
     完成
    </view>
   </view>
  </view>
 </view>
</view>
<view class='header2'>
 <view class='header'>
  <view class='header_con flex_between'>
   <input value='类目一' disabled='{{title_disabled}}' focus="{{!title_disabled}}">
   </input>
   <view class='right flex_end'>
    <block wx-if="{{title_disabled}}">
     <image src='../../../image/hotel/delete.png' bindtap='change_classname'></image>
    </block>
    <block wx-if="{{!title_disabled}}">
     <view class='flex_center' bindtap='finish_classname'>
      完成
     </view>
    </block>
   </view>
  </view>
 </view>
</view>
<view class='onlinechoose'>
 <view class='hotel_list flex_center' wx:for="{{items}}" wx:key="items" wx:for-item="i" data-id="{{index}}" bindtap='select'>
  <view class='list_cons flex_start'>
   <view wx:if="{{management_good}}" class='lefts'>
    <block wx-if="{{!i.checked}}">
     <view class='icon_none'></view>
    </block>
    <block wx-if="{{i.checked}}">
     <icon type="success" size="30" color="red" />
    </block>
   </view>
   <image src='../../../image/hotel/demoimg.jpg'></image>
   <view class='right'>
    <view class='name'>
     {{i.name}}
    </view>
    <view class='list1 flex_between'>
     <view class='left'>
      <view class='condition1'>
       16?|双人床|含早
      </view>
      <view class='condition2'>
       <block>
        间数：10
       </block>
       <block>
        间数：2
       </block>
      </view>
     </view>
    </view>
    <view class='list1 flex_between'>
     <view class='left'>
      <view class='condition2'>
       类目一
      </view>
     </view>
    </view>
   </view>
  </view>
 </view>
</view>
<view class='bottom flex_between' wx:if="{{management_good}}">
 <view class='left flex_start'>
  <block wx:if="{{select_all}}">
   <view bindtap='select_none' class='flex_start'>
    <icon type="success" size="30" color="red" />
    <view>
     取消全选
    </view>
   </view>
  </block>
  <block wx:if="{{!select_all}}">
   <view bindtap='select_all' class='flex_start'>
    <view class='select_none'>
    </view>
    <view>
     全选
    </view>
   </view>
  </block>
 </view>
 <view class='right flex_end'>
  <view style='text-align:right'>
   <view class='all'>
    共选中{{middlearr.length}}件商品
   </view>
  </view>
  <view bindtap='deleteitem' class='sure'>
   删除
  </view>
 </view>
</view>

下面是我的代码 由于wxss我是在app.wxss和当前文件都有的没太多的整理全都贴上去了，在这里多说一句小程序是支持弹性布局的，当你命名好几个弹性盒子的类名后，将会发现css将会减少很大的工作量

wxss

.header1{
 background-color: #f5f5f5;
}
.header2{
 background-color: #ffffff;
}
.header {
 width: 100%;
 height: 80rpx;
 border-bottom: 1rpx solid #d6d6d6;
}
.header .header_con {
 width: 700rpx;
 height: 80rpx;
 margin: 0 auto;
 color: #333;
 font-size: 30rpx;
}
.header .header_con image{
 width: 44rpx;
 height: 44rpx;
}
.header .header_con .right{
 color: #ff4965;
}
.bottom{
 width: 100%;
 height: 100rpx;
 border-top: 1rpx solid #d6d6d6;
 background-color: #fff;
 position: fixed;
 left: 0rpx;
 bottom: 0rpx;
}
.bottom .left{
 margin-left: 25rpx;
}
.bottom .left .select_none{
 width: 60rpx;
 height: 60rpx;
 border: 1rpx solid #d6d6d6;
 border-radius: 50%;
}
.bottom .right .all{
 color: #ff830f;
 font-size: 26rpx;
}
.bottom .right .gray{
 color: #666666;
 font-size: 22rpx;
}
.bottom .right .sure{
 margin-left: 22rpx;
 width: 220rpx;
 height: 100rpx;
 line-height: 100rpx;
 text-align: center;
 background-color: #ff4965;
 color: #fff;
}

/*列表*/
.onlinechoose{
 width: 750rpx;
 margin-top: 15rpx;
 background-color: #ffffff;
 font-size: 32rpx;
}
.onlinechoose .hotel_list{
 width: 750rpx;
 height: 260rpx;
 border-bottom: 1rpx solid #d6d6d6;
 background-color: #ffffff;
}
.onlinechoose .hotel_list .icon_none{
 width: 60rpx;
 height: 60rpx;
 border: 1rpx solid #d6d6d6;
 border-radius: 50%;
}
.onlinechoose .hotel_list .list_cons{
 width: 700rpx;
 height: 200rpx;
}
.onlinechoose .list_cons .lefts{
 width: 80rpx;
}
.onlinechoose .list_cons image{
 width: 200rpx;
 height: 200rpx;
 margin-right: 25rpx;
}
.list_cons .right{
 width: 395rpx;
 height: 200rpx;
}
.list_cons .right .name{
 font-size: 32rpx;
 color: #333333;
 font-weight: 700;
 letter-spacing: 3rpx;
 margin-bottom: 20rpx;
}
.list_cons .right .list1{
  margin-bottom: 17rpx;
}
.list_cons .right .list1 .condition1{
 font-size: 28rpx;
 color: #999999;
 margin-bottom: 15rpx;
}
.list_cons .right .list1 .condition2{
 font-size: 24rpx;
 color: #999999;
}
.list_cons .right .list1 .act{
 color: #2d8622;
}
.list_cons .right .list1 .r{
 font-size: 24rpx;
 color: #ff4965;
}
.list_cons .right .list1 .big{
 font-size: 32rpx;
}
.list_cons .right .lists2{
 height: 36rpx;
  line-height: 36rpx;
  font-size: 22rpx;
}
.list_cons .right .lists2 .left{
 width: 162rpx;
 text-align: center; 
 color: #ff4965;
 border: 1rpx solid #ff4965;
 box-sizing: border-box;
 border-radius: 5rpx;
}
.list_cons .right .lists2 .right2{
 color: #999999;
}
.flex_center{
 display: flex;
 display: -webkit-flex;
 justify-content: center;
 align-items: center;
}
.flex_between{
 display: flex;
 display: -webkit-flex;
 justify-content: space-between;
 align-items: center;
}
.flex_start{
 display: flex;
 display: -webkit-flex;
 justify-content: flex-start;
 align-items: center;
}
.flex_end{
 display: flex;
 display: -webkit-flex;
 justify-content: flex-end;
 align-items: center;
}

js

js纯手写虽然不太好吧！但是功能实现了，万恶 的checkbox魔鬼
初始化

data: {
  imgUrl: imgUrl,
  title_disabled:true,//控制修改表头名字
  management_good:false,
  select_all:false,
  middlearr:[],
  items: [
   { name: '1', checked: false},
   { name: '2', checked: false},
   { name: '3', checked: false},
   { name: '4', checked: false},
   { name: '5', checked: false},
   { name: '6', checked: false},
  ],
 },
 // 改变类目的名字
 change_classname:function(){
   let that = this;
   that.setData({
    title_disabled: !that.data.title_disabled,
   });
  // 这里自动获取焦点
 },
 finish_classname: function () {
  let that = this;
  that.setData({
   title_disabled: !that.data.title_disabled,
  })
 },
 // 管理商品
 management:function(){
  let that = this;
  that.setData({
   management_good: true,
  })
 },
 finish_management:function(){
  let that = this;
  that.setData({
   management_good:false,
  })
 },
 // 选择
 select:function(e){
  var that = this;
  let arr2 = [];
  if (that.data.management_good == false){
    return;
  }else{
   var arr = that.data.items;
   var index = e.currentTarget.dataset.id;
   arr[index].checked = !arr[index].checked;
   console.log(arr);

   for(let i=0;i<arr.length;i++){
     if(arr[i].checked){
      arr2.push(arr[i])
     }
   };
   that.setData({
    items: arr,
    middlearr:arr2
   })
  }
 },
 // 删除
 deleteitem:function(){
  var that = this;
  let arr = that.data.items;
  let arr2 = [];
  console.log(arr);
  for(let i=0;i<arr.length;i++){
   if (arr[i].checked == false){
    arr2.push(arr[i]);
   }
  }
  that.setData({
   items:arr2,
   middlearr:[]
  })
 },
 // 全选
 select_all:function(){
  let that = this;
  that.setData({
   select_all: !that.data.select_all
  })
  if (that.data.select_all){
   let arr = that.data.items;
   let arr2 = [];
   for (let i = 0; i < arr.length; i++) {
    if (arr[i].checked == true) {
     arr2.push(arr[i]);
    }else{
     arr[i].checked = true;
     arr2.push(arr[i]);
    }
   }
   that.setData({
    items: arr2,
    middlearr:arr2
   })
  }
 },
 // 取消全选
 select_none:function(){
  let that = this;
  that.setData({
   select_all: !that.data.select_all
  })
  let arr = that.data.items;
  let arr2 = [];
  for (let i = 0; i < arr.length; i++) {
    arr[i].checked = false;
    arr2.push(arr[i]);
  }
  that.setData({
   items: arr2,
   middlearr:[]
  })
 },

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持三水点靠木。

展开阅读全文
上一篇： vue-cli项目配置多环境的详细操作过程
下一篇： 基于vue2.0实现仿百度前端分页效果附实现代码

更多Javascript文章

JS模拟面向对象全解（一、类型及传递）
JS模拟面向对象全解（一、类型及传递）
Jul 13 20
jQuery Trim去除字符串首尾空字符的实现方法说明
jQuery Trim去除字符串首尾空字符的实现方法说明
Feb 11 20
不想让浏览器运行javascript脚本的方法
不想让浏览器运行javascript脚本的方法
Nov 20 15
jQuery实现最简单的切换图效果【可兼容IE6、火狐、谷歌、opera等】
jQuery实现最简单的切换图效果【可兼容IE6、火狐、谷歌、opera等】
Sep 04 27
JavaScript正则替换HTML标签功能示例
JavaScript正则替换HTML标签功能示例
Mar 02 22
js异步编程小技巧详解
js异步编程小技巧详解
Aug 14 25
Vue如何从1.0迁移到2.0
Vue如何从1.0迁移到2.0
Oct 19 18
手机访问当前页面