Practical Tutorial on WeChat Development

This article mainly introduces relevant information about WeChat Mini Program practical mini program examples. Friends who need it can refer to it

The basic components and API of WeChat Mini Program have been released Finally, I have to get back to the topic. I spent most of the day making a streamlined version of Baisi Bujie, including four modules: jokes, pictures, audio, and video. This article will give you a brief introduction to this small APP. The source code will be put on GitHub and you are welcome to start.

What can I learn from the project?

1. tabbar usage

2. Network call realInterface

3. loading uses

4. scroll-view to implement pull-down refresh and pull-up loading.

5. image component processes images,

6. Music and VideoUsage of components

7. JumpPass valueUse

8. wait wait wait. . . .

app.jsonGlobalConfiguration file

{
 "pages":[
  "pages/word/word",
  "pages/image/image",
  "pages/voice/voice",
  "pages/video/video",
  "pages/detail/detail"
 ],
 "tabBar": {
  "color": "#a9b7b7",
  "selectedColor": "#eb4f38",
  "borderStyle": "white",
  "backgroundColor": "#ffffff",
  "list": [
   {
    "pagePath": "pages/word/word",
    "text": "段子",
    "iconPath": "image/wordN.png",
    "selectedIconPath": "image/wordS.png"
   },
   {
    "pagePath": "pages/image/image",
    "text": "图片",
    "iconPath": "image/imageN.png",
    "selectedIconPath": "image/imageS.png"
   },
   {
    "pagePath": "pages/voice/voice",
    "text": "声音",
    "iconPath": "image/voiceN.png",
    "selectedIconPath": "image/voiceS.png"
   },
   {
    "pagePath": "pages/video/video",
    "text": "视频",
    "iconPath": "image/videoN.png",
    "selectedIconPath": "image/videoS.png"
   }

  ]
 },
 "window":{
  "backgroundTextStyle":"light",
  "navigationBarBackgroundColor": "#eb4f38",
  "navigationBarTextStyle":"white"
 }
}

Here we only need to configure the programGlobal properties, each page needs to be introduced in the pags attribute. Sometimes the tabbar does not display, it may be because of this, the bottom of the tabbarNavigationItem is divided into four items in the list. The main configuration here is the selected and unselected color, background color, page introduction and picture introduction for each bottom option page. The window attribute mainly configures the overall color, text color and background color of the form. The window attribute here will be overridden by the window attribute of each page.

app.wxss

/*整体view样式*/
.containsView{
 padding: 15rpx 15rpx 15rpx 15rpx;
 margin-top: 15rpx;
 margin-bottom: 15rpx;
 background-color: white;
}
/*头部整体样式*/
.topContainsView{
 display: flex;
 flex-direction: row;
 align-items: center;
 margin-bottom: 18rpx;
}

/**
 * 头像样式
*/
.profileImage{
 width: 60rpx;
 height: 60rpx;
 border-radius: 30rpx;
}

/*头部显示名字和时间整体样式*/
.topRightView{
 margin-left: 15rpx;
 display: flex;
 flex-direction: column;
}
/*用户名称样式*/
.topRightName{
 font-size: 18rpx;
}
/*时间样式*/
.topRightTime{
 font-size: 14rpx;
 color: #b8b2b2;
 margin-top: 10rpx;
}

/*因为中间部分不一样不放在整体样式中*/

/*底部view整体样式*/
.bottomView{
 display: flex;
 flex-direction: row;
 justify-content: space-between;
 align-items: center;
}
/*每个Item样式*/
.bottomItemView{
 display: flex;
 flex-direction: row;
 align-items: center;
 justify-content: center;
 margin-top: 18rpx;
 padding-left: 10rpx;
 padding-right: 10rpx;
}
/*Item样式中的图标样式 顶 踩 分享 评论*/
.bottomItemImage{
 width: 45rpx;
 height: 45rpx;
}
/*Item中的文字样式 顶 踩 分享 评论*/
.bottomItemText{
 font-size: 15rpx;
 color: #b8b2b2;
 margin-left: 10rpx;
 margin-top: 8rpx;
}

/*分割线样式*/
.pLine{
 background: #f3f3f3;
 width: 100%;
 height: 15rpx;
}

app.wxssme Divide the four modules into three parts: header, content area, and bottom. Because the header and bottom styles of each page are the same but the middle part is different, I extracted 1 and 3 into the global, Comments Relatively clear

paragraph module

word.wxml

##

<loading hidden="{{loadingHidden}}">正在加载...</loading>
<scroll-view scroll-y="true" bindscrolltoupper="bindscrolltoupper" bindscrolltolower="bindscrolltolower" style="height: 100%">
 <block wx:for-items="{{list}}">
  <!-- 分割线 -->
  <view class="pLine"></view>
  <!-- 整体item样式 -->
  <view class="containsView">
   <view class="topContainsView">
    <image class="profileImage" src="{{item.profile_image}}" />
    <view class="topRightView">
     <text class="topRightName">{{item.name}}</text>
     <text class="topRightTime">{{item.passtime}}</text>
    </view>
   </view>
   <!-- 中间内容 -->
   <text class="centerContent">{{item.text}}</text>
   <!-- 底部view样式 -->
   <view class="bottomView">
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/ding.png" />
     <text class="bottomItemText">{{item.ding}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/cai.png" />
     <text class="bottomItemText">{{item.cai}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/share.png" />
     <text class="bottomItemText">{{item.repost}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/comment.png" />
     <text class="bottomItemText">{{item.comment}}</text>
    </view>
   </view>
  </view>
 </block>
</scroll-view>

We wrap the outer layer with scroll-view. To achieve loading more and pull-up refresh bindscrolltoupper=”bindscrolltoupper” this attribute will call this method when sliding to the top bindscrolltolower=”bindscrolltolower” this will be called when sliding to the bottom. At the beginning, the header and bottom layouts can also be extracted by introducing If you use it in this way, you don’t need to write all four pages. You can get it yourself

word.js

Page({
 data: {
  list: [],
  maxtime: '',
  loadingHidden: false
 },
 onLoad: function (options) {
  // 页面初始化 options为页面跳转所带来的参数
  //加载最新
  this.requestData('newlist');
 },

 /**
  * 上拉刷新
  */
 bindscrolltoupper: function () {
  //加载最新
  // this.requestData('newlist');
 },

 /**
  * 加载更多
  */
 bindscrolltolower: function () {
  console.log('到底部')
  //加载更多
  this.requestData('list');
 },

 /**
  * 请求数据
  */
 requestData: function (a) {
  var that = this;
  console.log(that.data.maxtime)
  wx.request({
   url: 'http://api.budejie.com/api/api_open.php',
   data: {
    a: a,
    c: 'data',
    maxtime: that.data.maxtime,
    type: '29',
   },
   method: 'GET',
   success: function (res) {
    console.log(res)
    console.log('上一页', that.data.list)
    that.setData({
     // 拼接数组
     list: that.data.list.concat(res.data.list),
     loadingHidden: true,
     maxtime: res.data.info.maxtime
    })

   }
  })
 },
 onReady: function () {
  // 页面渲染完成
 },
 onShow: function () {
  // 页面显示
 },
 onHide: function () {
  // 页面隐藏
 },
 onUnload: function () {
  // 页面关闭
 }
})

The data is loaded here through the requestData method. This method accepts a parameter, which is to load the latest or more through this parameter. The maxtime parameter is used to load the next page. The maxtime of the previous page is used as the parameter to load the next page. Condition, to load the next page of data, we use the concat method to splice the arrays and change the loading

status loading. One of word.wxml and word.json sets the content font size, and the other sets the navigation bar text, so I won’t post it here.

Image module

image.wxml

<loading hidden="{{loadingHidden}}">正在加载...</loading>
<scroll-view scroll-y="true" bindscrolltolower="bindscrolltolower" style="height: 100%">
 <block wx:for-items="{{list}}">
  <!-- 分割线 -->
  <view class="pLine"></view>
  <!-- 整体item样式 -->
  <view class="containsView">
   <view class="topContainsView">
    <image class="profileImage" src="{{item.profile_image}}" />
    <view class="topRightView">
     <text class="topRightName">{{item.name}}</text>
     <text class="topRightTime">{{item.passtime}}</text>
    </view>
   </view>
   <text style="font-size: 30rpx">{{item.text}}</text>
   <!-- 当时gif图 -->
   <view wx:if="{{item.is_gif != 0}}" style="position: relative;">
    <image class="centerContent" src="{{item.cdn_img}}" mode="aspectFill" />
   </view>
   <!-- 普通大图 可点击查看全部图片 -->
   <view data-url="{{item.cdn_img}}" data-height="{{item.height}}" data-width="{{item.width}}"
      bindtap="lookBigPicture" wx:elif="{{item.is_gif == 0}}" style="position: relative;">
    <!-- 图片资源 -->
    <image class="centerContent" src="{{item.cdn_img}}" mode="aspectFill" />
    <!-- 图片上浮动的点击查看详情图片view -->
    <view class="flexView">
     <image src="../../image/seeBigPicture.png" style="width: 60rpx; height: 60rpx;" />
     <text class="flexText">点击查看全图</text>
    </view>
   </view>
   <!-- 底部view样式 -->
   <view class="bottomView">
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/ding.png" />
     <text class="bottomItemText">{{item.ding}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/cai.png" />
     <text class="bottomItemText">{{item.cai}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/share.png" />
     <text class="bottomItemText">{{item.repost}}</text>
    </view>
    <view class="bottomItemView">
     <image class="bottomItemImage" src="../../image/comment.png" />
     <text class="bottomItemText">{{item.comment}}</text>
    </view>
   </view>
  </view>
 </block>
</scroll-view>

Here mainly depends on the middle part. We distinguish and process the pictures by whether they are gifs. If they are not gifs, you can click to view the larger pictures. Here are A view floating effect, combined with the interface and image.wxss to see

image.wxss

/*中间文字样式*/
.centerContent{
 margin-top: 20rpx;
 width: 100%;
 height: 600rpx;

}
/*中间浮动文字样式*/
.flexView{
display: flex;
justify-content: center;
align-items: center;
width: 100%;
height: 80rpx;
position: absolute;
z-index: 2;
top: 540rpx;
background: #000000;
opacity: 0.6

}
/*浮动文字*/
.flexText{
 color: white;
 font-size: 35rpx;
}

image.js

var detail = '../detail/detail'
Page({
 data: {
  list: [],
  maxtime: '',
  loadingHidden: false
 },
 onLoad: function (options) {
  // 页面初始化 options为页面跳转所带来的参数
  this.requestData('newlist');

 },
 /**
  * 滚动到底部时加载下一页
  */
 bindscrolltolower: function () {
  console.log('到底部')
  this.requestData('list');

 },

 /**
  * 加载数据
  */
 requestData: function (a) {
  var that = this;
  wx.request({
   url: 'http://api.budejie.com/api/api_open.php',
   data: {
    a: a,
    c: 'data',
    // 上一页的maxtime作为加载下一页的条件，
    maxtime: this.data.maxtime,
    type: '10',
   },
   method: 'GET',
   success: function (res) {
    console.log(res)
    console.log('上一页', that.datalist)
    that.setData({
     // 拼接数组
     list: that.data.list.concat(res.data.list),
     loadingHidden: true,
     maxtime: res.data.info.maxtime
    })

   }
  })
 },
 /**
  * 查看大图
  */
 lookBigPicture: function (e) {
  console.log(e);
  console.log(e.currentTarget.id)
  //图片url 对应wxml中data-url="{{item.url}}"
  var url = e.currentTarget.dataset.url;
  //获取图片高度 对应wxml中data-height="{{item.height}}"
  var height = e.currentTarget.dataset.height;
  //获取图片高度 对应wxml中data-width="{{item.width}}"
  var width = e.currentTarget.dataset.width;
  // 传参方式向GET请求
  wx.navigateTo({
   url: detail + '?' + 'url=' + url + "&height=" + height + "&width=" + width,
   success: function (res) {
    console.log(res)
   },
   fail: function (err) {
    console.log(err)
   },
  })
 },
 onReady: function () {
  // 页面渲染完成
 },
 onShow: function () {
  // 页面显示
 },
 onHide: function () {
  // 页面隐藏
 },
 onUnload: function () {
  // 页面关闭
 }
})

Here we mainly look at the lookBigPicture method view data-url=”{{item.cdn_img}}” data-height=”{{item.height}}” data-width="{{item.width}}" will be installed in the logic code. The syntax is var url = e.currentTarget.dataset.url; if the value is transferred, the request will be sent to GET according to the format.

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1. WeChat public account platform source code download

2. Voting source code download

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