微信小程序弹窗

微信小程序自定义底部、顶部、中间、左边、右边弹窗
简单的微信小程序弹窗功能，具体实现过程，请浏览代码。

顶部弹出窗图例：

中间弹出窗图例：

底部弹出窗图例：

左边弹出窗图例：

右边弹出窗图例：

1. wxml代码

<button type="primary" bindtap="openPopup" data-index="0">打开顶部弹窗button>
<button type="primary" bindtap="openPopup" data-index="1">打开中间弹窗button>
<button type="primary" bindtap="openPopup" data-index="2">打开底部弹窗button>
<button type="primary" bindtap="openPopup" data-index="3">打开左边弹窗button>
<button type="primary" bindtap="openPopup" data-index="4">打开右边弹窗button>

<view class="popup-box" wx:if="{{showIndex=='0'}}" bindtap="closePopup">view> 
<view class="info-top" wx:if="{{showIndex=='0'}}">
  <view class="row-info">
    <view>
      <text class="line left-line">text>
      <text>《登高》text>
      <text class="line right-line">text>
    view>
    <view class="row-author">杜甫 〔唐代〕view>
    <view>风急天高猿啸哀，渚清沙白鸟飞回。view>
    <view>无边落木萧萧下，不尽长江滚滚来。view>
    <view>万里悲秋常作客，百年多病独登台。view>
    <view>艰难苦恨繁霜鬓，潦倒新停浊酒杯。view>
  view>
  <view class="row-btn">
    <view class="left-btn" bindtap="closePopup">取消view>
    <view class="right-btn">确认view>
  view>
view>

<view class="popup-box" wx:if="{{showIndex=='1'}}" bindtap="closePopup">view> 
<view class="info-center" style="top:{{height*0.3}}px;height:{{height*0.4}}px;"
wx:if="{{showIndex=='1'}}">
  <view>
    <view class="row-info">
      <view>
        <text class="line left-line">text>
        <text>《登高》text>
        <text class="line right-line">text>
      view>
      <view class="row-author">杜甫 〔唐代〕view>
      <view>风急天高猿啸哀，渚清沙白鸟飞回。view>
      <view>无边落木萧萧下，不尽长江滚滚来。view>
      <view>万里悲秋常作客，百年多病独登台。view>
      <view>艰难苦恨繁霜鬓，潦倒新停浊酒杯。view>
    view>
    <view class="row-btn">
      <view class="left-btn" bindtap="closePopup">取消view>
      <view class="right-btn">确认view>
    view>
  view>
view>

<view class="popup-box" wx:if="{{showIndex=='2'}}" bindtap="closePopup">view> 
<view class="info-bottom" wx:if="{{showIndex=='2'}}">
  <view class="row-info">
    <view>
      <text class="line left-line">text>
      <text>《登高》text>
      <text class="line right-line">text>
    view>
    <view class="row-author">杜甫 〔唐代〕view>
    <view>风急天高猿啸哀，渚清沙白鸟飞回。view>
    <view>无边落木萧萧下，不尽长江滚滚来。view>
    <view>万里悲秋常作客，百年多病独登台。view>
    <view>艰难苦恨繁霜鬓，潦倒新停浊酒杯。view>
  view>
  <view class="row-btn">
    <view class="left-btn" bindtap="closePopup">取消view>
    <view class="right-btn">确认view>
  view>
view>


<view class="popup-box" wx:if="{{showIndex=='3'}}" bindtap="closePopup">view> 
<view class="info-left" wx:if="{{showIndex=='3'}}">
  <view class="row-info">
    <view>
      <text class="line left-line">text>
      <text>《登高》text>
      <text class="line right-line">text>
    view>
    <view class="row-author">杜甫 〔唐代〕view>
    <view>风急天高猿啸哀，view>
    <view>渚清沙白鸟飞回。view>
    <view>无边落木萧萧下，view>
    <view>不尽长江滚滚来。view>
    <view>万里悲秋常作客，view>
    <view>百年多病独登台。view>
    <view>艰难苦恨繁霜鬓，view>
    <view>潦倒新停浊酒杯。view>
  view>
  <view class="row-btn fixed">
    <view class="left-btn" bindtap="closePopup">取消view>
    <view class="right-btn">确认view>
  view>
view>

<view class="popup-box" wx:if="{{showIndex=='4'}}" bindtap="closePopup">view> 
<view class="info-right" wx:if="{{showIndex=='4'}}">
  <view class="row-info">
    <view>
      <text class="line left-line">text>
      <text>《登高》text>
      <text class="line right-line">text>
    view>
    <view class="row-author">杜甫 〔唐代〕view>
    <view>风急天高猿啸哀，view>
    <view>渚清沙白鸟飞回。view>
    <view>无边落木萧萧下，view>
    <view>不尽长江滚滚来。view>
    <view>万里悲秋常作客，view>
    <view>百年多病独登台。view>
    <view>艰难苦恨繁霜鬓，view>
    <view>潦倒新停浊酒杯。view>
  view>
  <view class="row-btn fixed">
    <view class="left-btn" bindtap="closePopup">取消view>
    <view class="right-btn">确认view>
  view>
view>

2. wxss代码

/* 蒙层 */
.popup-box{
  position: absolute;
  z-index: 99;
  top: 0;
  background-color: rgba(0, 0, 0, 0.5);
  width: 100%;
  height: 100%;
}
/* 上 */
.info-top{
  position: fixed;
  z-index: 999;
  width: 100%;
  top: 0;
  background-color: white;
  border-bottom-left-radius: 5rpx;
  border-bottom-right-radius: 5rpx;
}
/* 中 */
.info-center{
  position: fixed;
  z-index: 999;
  background-color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10rpx;
  width: 90%;
  margin-left: 5%;
  margin-right: 5%;
}
/* 下 */
.info-bottom{
  position: fixed;
  z-index: 999;
  width: 100%;
  bottom: 0;
  background-color: white;
  border-top-left-radius: 10rpx;
  border-top-right-radius: 10rpx;
}
/* 左 */
.info-left{
  position: fixed;
  z-index: 999;
  width: 50%;
  height: 100%;
  top: 0;
  background-color: white;
  border-top-right-radius: 10rpx;
  border-bottom-right-radius: 10rpx;
}
/* 右 */
.info-right{
  position: fixed;
  z-index: 999;
  width: 50%;
  height: 100%;
  right: 0;
  top: 0;
  background-color: white;
  border-top-left-radius: 10rpx;
  border-bottom-left-radius: 10rpx;
}
/* 自定义内容（根据自己需求更改,可删除） */
button{
  margin: 15rpx 0;
}
.row-info{
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 15rpx;
  font-size: 32rpx;
}
.row-info view{
  padding: 10rpx 0;
}
.row-info view:first-child{
  display: flex;
  flex-direction: row;
  align-items: center;
}
.line{
  width: 100rpx;
  height: 1rpx;
}
.left-line{
  background-image: linear-gradient(to left,orange,white);
}
.right-line{
  background-image: linear-gradient(to right,orange,white);
}
.row-author{
  font-size: 24rpx;
  color: gray;
}
.row-btn{
  display: flex;
  flex-direction: row;
  align-items: center;
  border-top: 1rpx dashed #f1f1f1;
}
.row-btn view{
  flex: 1;
  text-align: center;
  margin: 20rpx 10%;
  padding: 12rpx 0;
  font-size: 32rpx;
  border-radius: 10rpx;
}
.left-btn{
  background-color: #f1f1f1;
  color: #33ccff;
}
.right-btn{
  background-color: #33ccff;
  color: white;
}
.fixed{
  position: fixed;
  bottom: 0;
  width: 50%;
}

3. js代码

Page({
  /**
   * 页面的初始数据
   */
  data: {
    showIndex:null,//打开弹窗的对应下标
    height:'',//屏幕高度
  },
  // 打开弹窗
  openPopup(e){
    var index = e.currentTarget.dataset.index;
    this.setData({
      showIndex:index
    })
  },
  //关闭弹窗
  closePopup(){
    this.setData({
      showIndex:null
    })
  },
  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady() {
    var that = this;
    // 动态获取屏幕高度
    wx.getSystemInfo({
      success: (result) => {
        that.setData({
          height: result.windowHeight
        });
      },
    })
  },
})

代码简洁，类型齐全。本人才疏学浅，代码仅供参考，如有问题，请多多指教，酸Q。