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小程序开发十三:新增动态页面的实现与分析

小程序开发十三:新增动态页面的实现与分析

作者: Mr姜饼 | 来源:发表于2019-12-17 15:56 被阅读0次

上一节为大家介绍了页面间的传值

这一节继续我们的开发流程,这节课我们来实现“新增动态”页面的实现

实现效果:

image.png image.png

首先我们在app.json中新增页面路径

 "pages": [
    "pages/login/login",
    "pages/home/home",
    "pages/userCenter/userCenter",
    "pages/home/dynamicDeatil/dynamicDeatil",
    "pages/home/addNewDynamic/addNewDynamic"
  ],

编译之后生成目录及4个文件

image.png

开始编写

addNewDynamic.json
{
  "usingComponents": {},
  "navigationBarTitleText": "新增动态"
}
addNewDynamic.wxml
<view class="container">
  <view class="inputContainer">
    <textarea class="inputView" placeholder="请输入发布内容" auto-height="false" bindinput="textInputListen" bindblur="bindTextAreaBlur"></textarea>
    <view class="line"></view>
  </view>
  <view class="photoContainer">
    <view class="photoItem" catchtap="selectPhoto">

      <image wx:if="{{selectedPhoto}}" src="{{selectedPhoto}}" class="selectedPhoto" mode="aspectFill"> </image>
      <image class="selectPhotoIcon" wx:else src="/images/home/selectPhoto.png"></image>
      <image class="canclePhoto" hidden="{{!selectedPhoto}}" src="/images/home/guanbi.png" catchtap="cancleSelectPhoto"> </image>
    </view>
  </view>
  <view class="postTap" catchtap="postNewDynamic" style="position:absolute ,backgroundColor: red ,width:{{width - 200}}rpx,height:100rpx,top:{{height - 100}}rpx,left : {{20}}rpx">发布
    
  </view>
</view>
addNewDynamic.wxss


.container {
  width: 100%;
  display: flex;
  flex-direction: column;
  padding: 20rpx 0rpx 0rpx 0rpx ;
}


.inputContainer {
  width: 100%;
  margin-top: 20rpx;
}

.inputView {
  width: 690rpx;
  margin-left: 30rpx;
  margin-top: 20rpx;
  padding: 10rpx 10rpx 10rpx 10rpx;
  font-size: 28rpx;
  color: #333;
}



.line {
  width: 690rpx;
  height: 1rpx;
  margin-left: 30rpx;
  background-color: lightgray;
  margin-top: 20rpx;
}

.photoContainer {
  width: 100%;
  margin-top: 60rpx;
}

.photoItem {
  width: 150rpx;
  height: 150rpx;
  border: 1rpx solid lightgray;
  margin-left: 30rpx;
  
}

.selectedPhoto{
  width: 150rpx;
  height: 150rpx;
}

.selectPhotoIcon{
  width: 80rpx;
  height: 80rpx;
  position: relative;
  top: 35rpx;
  left: 35rpx;
}

.canclePhoto{
  width: 40rpx;
  height: 40rpx;
  position: relative;
  left: 130rpx;
  top: -180rpx;
  background-color: white;
  border-radius: 20rpx;
}

.postTap{
  position:fixed; 
  bottom:60rpx; 
  background-color:#50c4e7;
  width: 700rpx;
  height: 90rpx;
  border-radius: 6rpx;
  
  font-size: 30rpx;
  color: white;
  line-height: 90rpx;
  text-align: center;

}



addNewDynamic.js
// pages/home/addNewDynamic/addNewDynamic.js


var qiniuUploader = require("../../../utils/qiniuUploader.js");


var requestTool = require("../../../utils/request.js");
const onfire = require("../../../utils/onfire.js");


Page({

  /**
   * 页面的初始数据
   */
  data: {
    selectedPhoto: "",//选择的图片文件
    imageURL:"",//发布的图片链接
    contentText: "",//发布的文字内容
    
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {
  
  },
  //选择照片
  selectPhoto: function() {
    var that = this;
    wx.chooseImage({
      count: 1, // 默认9
      sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图,默认二者都有
      sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有
      success: function(res) {
        var tempFilePaths = res.tempFilePaths
        console.log(tempFilePaths);
        var url = tempFilePaths[0];
        that.setData({   //将选择的照片绑定数据
          selectedPhoto: url
        });
      },
    })
  },
    //取消选择
   cancleSelectPhoto: function() {
    this.setData({
      selectedPhoto: ""
    });
  },

  bindTextAreaBlur: function(e) {
    console.log(e.detail.value);
    this.setData({
      contentText: e.detail.value   //绑定发文内容
    })

  },

  bindFormSubmit: function(e) {
    console.log(e.detail.value.textarea);
    this.setData({
      contentText: e.detail.value
    });
    this.submitAllData(); 
  },




  postNewDynamic:function(){
    this.startReadytAllData();
  },
  
  startReadytAllData: function () {
    
    if(!this.data.contentText){
      wx.showModal({
        title: '温馨提示',
        content: '请输入文字内容',
        showCancel: false,
      });
      return;
    }
    if (!this.data.selectedPhoto) {
      wx.showModal({
        title: '温馨提示',
        content: '请选择一张照片',
        showCancel: false,
      });
      return;
    }

    //获取图片链接
    this. getQiNiuData();

  },

  getQiNiuData:function(){

    var that = this;
    var pathUrl = "/qiniu/token/upload-img";
    var paraData = {
      type : 1,
    };
    requestTool.getRequest(pathUrl, paraData, that.getQiNiuSuccess, that.getQiNiuFailed);

  },

  getQiNiuSuccess:function(data){
    console.log("请求七牛成功" +  data);
    this.didUploadChooseImage(data);
  },

  getQiNiuFailed:function(){
    console.log("请求失败");
  },

  /**
   * 获取图片链接
   */
  didUploadChooseImage: function (paraDic) {

    var token = paraDic.token;
    var key = paraDic.filekey;
    var domain = paraDic.domain; 


    var that = this;

    var filePath = that.data.selectedPhoto;

    qiniuUploader.upload(filePath, (res) => {
    
      that.setData({
        'imageURL': res.imageURL,
      });
      console.log('file url is: ' + res.fileUrl);


      that.submitAllData();
    }, (error) => {
      console.log('error: ' + error);
    }, {
        region: 'ECN',
        domain: domain, 
        //key: 'customFileName.jpg', // [非必须]自定义文件 key。如果不设置,默认为使用微信小程序 API 的临时文件名
        // 以下方法三选一即可,优先级为:uptoken > uptokenURL > uptokenFunc
        uptoken: token, // 由其他程序生成七牛 uptoken
        //uptokenURL: 'UpTokenURL.com/uptoken', // 从指定 url 通过 HTTP GET 获取 uptoken,返回的格式必须是 json 且包含 uptoken 字段,例如: {"uptoken": "[yourTokenString]"}
        //uptokenFunc: function () { return '[yourTokenString]'; }
      }, (res) => {
        console.log('上传进度', res.progress)
        console.log('已经上传的数据长度', res.totalBytesSent)
        console.log('预期需要上传的数据总长度', res.totalBytesExpectedToSend)
      }, () => {
        // 取消上传
      }, () => {
        // `before` 上传前执行的操作
      }, (err) => {
        // `complete` 上传接受后执行的操作(无论成功还是失败都执行)
      });
 

  },

  submitAllData:function(){
    var that = this;
    var pathUrl = "/dynamic/commit";
    var postData = {
      url : that.data.imageURL,
      text : that.data.contentText,
    };
    requestTool.postRequest(pathUrl, postData, that.submitDynamixSuccess, that.submitDynamicFailed);
  },

  submitDynamixSuccess:function(data){
    console.log("发布成功");

    onfire.fire("reloadDynamicFunction");
    wx.navigateBack();
  },
  submitDynamicFailed:function(){
    console.log("发布失败");
  },

})

引用的第三方js文件“qiniuUploader.js”

// created by gpake
(function() {

var config = {
    qiniuRegion: '',
    qiniuImageURLPrefix: '',
    qiniuUploadToken: '',
    qiniuUploadTokenURL: '',
    qiniuUploadTokenFunction: null,
    qiniuShouldUseQiniuFileName: false
}

module.exports = {
    init: init,
    upload: upload,
}

// 在整个程序生命周期中,只需要 init 一次即可
// 如果需要变更参数,再调用 init 即可
function init(options) {
    config = {
        qiniuRegion: '',
        qiniuImageURLPrefix: '',
        qiniuUploadToken: '',
        qiniuUploadTokenURL: '',
        qiniuUploadTokenFunction: null,
        qiniuShouldUseQiniuFileName: false
    };
    updateConfigWithOptions(options);
}

function updateConfigWithOptions(options) {
    if (options.region) {
        config.qiniuRegion = options.region;
    } else {
        console.error('qiniu uploader need your bucket region');
    }
    if (options.uptoken) {
        config.qiniuUploadToken = options.uptoken;
    } else if (options.uptokenURL) {
        config.qiniuUploadTokenURL = options.uptokenURL;
    } else if(options.uptokenFunc) {
        config.qiniuUploadTokenFunction = options.uptokenFunc;
    }
    if (options.domain) {
        config.qiniuImageURLPrefix = options.domain;
    }
    config.qiniuShouldUseQiniuFileName = options.shouldUseQiniuFileName
}

function upload(filePath, success, fail, options, progress, cancelTask, before, complete) {
    if (null == filePath) {
        console.error('qiniu uploader need filePath to upload');
        return;
    }
    if (options) {
      updateConfigWithOptions(options);
    }
    if (config.qiniuUploadToken) {
        doUpload(filePath, success, fail, options, progress, cancelTask, before, complete);
    } else if (config.qiniuUploadTokenURL) {
        getQiniuToken(function() {
            doUpload(filePath, success, fail, options, progress, cancelTask, before, complete);
        });
    } else if (config.qiniuUploadTokenFunction) {
        config.qiniuUploadToken = config.qiniuUploadTokenFunction();
        if (null == config.qiniuUploadToken && config.qiniuUploadToken.length > 0) {
            console.error('qiniu UploadTokenFunction result is null, please check the return value');
            return
        }
        doUpload(filePath, success, fail, options, progress, cancelTask, before, complete);
    } else {
        console.error('qiniu uploader need one of [uptoken, uptokenURL, uptokenFunc]');
        return;
    }
}

function doUpload(filePath, success, fail, options, progress, cancelTask, before, complete) {
    if (null == config.qiniuUploadToken && config.qiniuUploadToken.length > 0) {
        console.error('qiniu UploadToken is null, please check the init config or networking');
        return
    }
    var url = uploadURLFromRegionCode(config.qiniuRegion);
    var fileName = filePath.split('//')[1];
    if (options && options.key) {
        fileName = options.key;
    }
    var formData = {
        'token': config.qiniuUploadToken
    };
    if (!config.qiniuShouldUseQiniuFileName) {
      formData['key'] = fileName
    }
    before && before();
    var uploadTask = wx.uploadFile({
        url: url,
        filePath: filePath,
        name: 'file',
        formData: formData,
        success: function (res) {
          var dataString = res.data
        //   // this if case is a compatibility with wechat server returned a charcode, but was fixed
        //   if(res.data.hasOwnProperty('type') && res.data.type === 'Buffer'){
        //     dataString = String.fromCharCode.apply(null, res.data.data)
        //   }
          try {
            var dataObject = JSON.parse(dataString);
            //do something
            var fileUrl = config.qiniuImageURLPrefix + '/' + dataObject.key;
            dataObject.fileUrl = fileUrl
            dataObject.imageURL = fileUrl;
            console.log(dataObject);
            if (success) {
              success(dataObject);
            }
          } catch(e) {
            console.log('parse JSON failed, origin String is: ' + dataString)
            if (fail) {
              fail(e);
            }
          }
        },
        fail: function (error) {
            console.error(error);
            if (fail) {
                fail(error);
            }
        },
        complete: function(err) {
            complete && complete(err);
        }
    })

    uploadTask.onProgressUpdate((res) => {
        progress && progress(res)
    })

    cancelTask && cancelTask(() => {
        uploadTask.abort()
    })
}

function getQiniuToken(callback) {
  wx.request({
    url: config.qiniuUploadTokenURL,
    success: function (res) {
      var token = res.data.uptoken;
      if (token && token.length > 0) {
        config.qiniuUploadToken = token;
        if (callback) {
            callback();
        }
      } else {
        console.error('qiniuUploader cannot get your token, please check the uptokenURL or server')
      }
    },
    fail: function (error) {
      console.error('qiniu UploadToken is null, please check the init config or networking: ' + error);
    }
  })
}

function uploadURLFromRegionCode(code) {
    var uploadURL = null;
    switch(code) {
        case 'ECN': uploadURL = 'https://up.qiniup.com'; break;
        case 'NCN': uploadURL = 'https://up-z1.qiniup.com'; break;
        case 'SCN': uploadURL = 'https://up-z2.qiniup.com'; break;
        case 'NA': uploadURL = 'https://up-na0.qiniup.com'; break;
        case 'ASG': uploadURL = 'https://up-as0.qiniup.com'; break;
        default: console.error('please make the region is with one of [ECN, SCN, NCN, NA, ASG]');
    }
    return uploadURL;
}

})();

完结:

 submitDynamixSuccess:function(data){
    console.log("发布成功");

    onfire.fire("reloadDynamicFunction");
    wx.navigateBack();//返回上个页面
  },

发表成功之后,onfire.on("reloadDynamicFunction'');
发送订阅消息,让home.js触发刷新数据的事件。

内容浅显易懂,有问题随时提问~

下一节:
传送门:
十四:动态详情页面的实现与分析

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