mpVue + 云开发微信小程序之旅

前言

本文是使用mpVue + 小程序云开发构建的mini型的微信小程序,小程序加载过程会稍微比较慢,如存在问题望各路大神指教。 小程序分为三个部分:1. 首页主要是展示发布的内容;2. 写日记是提供添加数据的项;3. 详情页是浏览内容正文的具体详情

喜欢的小伙伴动动您的小手给个小星星哦,谢谢!! 小程序源码

小程序二维码

首页

先看首页效果图,顶部是一个轮播此轮播是获取预览人数排名第一个的发布的图片,中间部分是内容展示区全部,最新,我的

直接上代码吧

// index.vue
methods: {
    // 跳转详情
    navigateTo (id) {
      wx.navigateTo({
        url: '../diaryDetail/main?id=' + id
      })
    },
    // 切换 全部, 最新, 我的
    switechNav (index) {
      this.isActive = index
      if (index === 0) {
        this.getDiaryList()
      }
      if (index === 1) {
        this.getNewList()
      }
      if (index === 2) {
        this.getOpenId()
      }
    },
    // 最近发布的,按时间排序前10条
    getNewList () {
      const that = this
      wx.showLoading({
        title: '加载中'
      })
      wx.cloud.callFunction({
        name: 'diaryList'
      }).then(res => {
        let infoList = res.result.data.reverse()
        setTimeout(function () {
          wx.hideLoading()
        }, 2000)
        that.diaryList = infoList.slice(0, 10)
      })
    },
    // 获取自己发布的
    getMyList () {
      const that = this
      const db = wx.cloud.database()
      const diary = db.collection('diary')
      wx.showLoading({
        title: '加载中'
      })
      diary.where({
        _openid: that.openId
      }).get({
        success: function (res) {
          setTimeout(function () {
            wx.hideLoading()
          }, 2000)
          if (res.data.length === 0) {
            toast('您暂时没有发布文章日记', 'none')
          }
          that.diaryList = res.data.reverse()
        }
      })
    },
    // 通过云函数获取日记的list
    getDiaryList () {
      const that = this
      wx.showLoading({
        title: '加载中'
      })
      wx.cloud.callFunction({
        name: 'diaryList'
      }).then(res => {
        setTimeout(function () {
          wx.hideLoading()
        }, 2000)
        let infoList = res.result.data
        that.diaryList = infoList.sort(function (a, b) {
          return b.preview - a.preview
        })
        that.imgUrls = that.diaryList[0].imagesList
      })
    },
    // 获取openid
    getOpenId () {
      const that = this
      wx.cloud.callFunction({
        name: 'user'
      }).then(res => {
        that.openId = res.result.OPENID
        that.getMyList()
      })
    }
}
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工具函数

工具函数在 utils/index.js,做时间格式化和弹出提示

function addZero (n) {
  return n > 10 ? n : '0' + n
}
// toast 弹出提示
export function toast (title = '成功', icon = 'success', duration = 2000) {
  wx.showToast({
    title: title,
    icon: icon,
    duration: duration
  })
}
// 时间格式化
export function getNowFormatDate () {
  const now = new Date()
  const year = now.getFullYear()
  const month = addZero(now.getMonth() + 1)
  const day = addZero(now.getDate())
  const hh = addZero(now.getHours())
  const mm = addZero(now.getMinutes())
  const ss = addZero(now.getSeconds())
  const timer = year + '-' + month + '-' + day + ' ' + hh + ':' + mm + ':' + ss
  return timer
}

export default {
  toast,
  getNowFormatDate
}
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详情页

展示内容详情,顶部轮播是作者上传的图片,可以点击查看原图,有为日记点赞,以及评论功能

// diaryDetail.vue
methods: {
    // id 是文章id通过首页跳转传过来 page页面可以用 this.$root.$mp.query.id 获取
    getDiaryDetail (id) {
      const that = this
      const db = wx.cloud.database()
      const diary = db.collection('diary')
      diary.doc(id).get().then(res => {
        that.detailInfo = res.data
        that.detailImgs = res.data.imagesList
      })
    },
  // 点赞
    dianZan () {
      const that = this
      const db = wx.cloud.database()
      const _id = this.$root.$mp.query.id
      const dianzan = db.collection('dianzan')
      dianzan.where({
        textId: _id,
        _openid: that.openId
      }).get({
        success: function (res) {
          if (res.data.length === 0) {
            that.addDZ()
            return false
          }
          toast('不能重复点赞哦!', 'none')
        }
      })
    },
    // 添加点赞人,以便可以判断是否重复点赞
    addDZ () {
      const that = this
      const _id = this.$root.$mp.query.id
      const db = wx.cloud.database()
      const dianzan = db.collection('dianzan')
      dianzan.add({
        data: {
          textId: _id, // 文字id
          isZan: 1 // 1 为点赞
        }
      }).then(res => {
        that.isAnimate = true
        that.changeDZCount(_id)
      })
    },
    // 调用点赞云函数,自增点赞数
    changeDZCount (id) {
      const that = this
      wx.cloud.callFunction({
        name: 'dianzan',
        data: {
          _id: id
        }
      }).then(res => {
        toast('谢谢您的认可哦!', 'none')
        that.getDiaryDetail(id)
      })
    },
    // 判断阅读的人是否对这篇文章已经点过赞,如果点过赞进入页面心直接变红
    getZan () {
      const that = this
      const db = wx.cloud.database()
      const _id = this.$root.$mp.query.id
      const dianzan = db.collection('dianzan')
      dianzan.where({
        textId: _id,
        _openid: that.openId
      }).get({
        success: function (res) {
          if (res.data.length) {
            that.isAnimate = true
          }
        }
      })
    },
    // 获取评论
    getComment (id) {
      const that = this
      const db = wx.cloud.database()
      const comment = db.collection('comment')
      comment.where({
        textId: id
      }).get({
        success: function (res) {
          that.commentList = res.data.reverse()
        }
      })
    },
    // 添加评论
    addComment () {
      if (this.content === '') {
        toast('请输入评论内容', 'none')
        return false
      }
      const that = this
      const db = wx.cloud.database()
      const comment = db.collection('comment')
      comment.add({
        data: {
          textId: this.$root.$mp.query.id, // 正文id
          user: that.userInfo, // 用户信息
          content: that.content, // 评论内容
          time: getNowFormatDate() // 评论时间
        }
      }).then(res => {
        that.contentCount = 0
        that.getComment(this.$root.$mp.query.id)
      })
    },
    // 判断用户是否发表过评论
    getIsComment () {
      const that = this
      const db = wx.cloud.database()
      const comment = db.collection('comment')
      comment.where({
        _openid: that.openId,
        textId: this.$root.$mp.query.id
      }).get().then(res => {
        if (res.data.length === 0) {
          that.addComment()
          toast('发表成功')
          that.content = ''
          return false
        }
        toast('不能重复发表评论哦!', 'none')
      })
    },
    // 绑定评论字数
    handleContentInput (e) {
      this.contentCount = e.target.value.length
    },
    // 发表评论
    onGotUserInfo (e) {
      this.userInfo = e.target.userInfo
      this.getIsComment()
    },
    // 轮播图 全屏预览图片 调用微信API wx.previewImage
    handleImagePreview (e) {
      let idx = e.target.dataset.idx
      let images = this.detailImgs
      wx.previewImage({
        current: images[idx],
        urls: images
      })
    }
}
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写日记

将 wx.chooseImage() 生成的临时图片保存到微信云存储,主要掉用 wx.cloud.uploadFile()方法

// write.vue
methods: {
    // 上传图片,并将临时图片保存到云存储中
    chooseImage () {
      const that = this
      wx.chooseImage({
        count: 9,
        sizeType: ['original', 'compressed'],
        sourceType: ['album', 'camera'],
        success: function (res) {
          // 将选择的图片上传到云存储
          for (let i = 0; i < res.tempFilePaths.length; i++) {
            const filePath = res.tempFilePaths[i]
            const name = Math.random() * 1000000
            const cloudPath = name + filePath.match(/\.[^.]+?$/)[0]
            wx.cloud.uploadFile({
              cloudPath,
              filePath,
              success: res => {
                let images = that.imagesList.concat(res.fileID)
                that.imagesList = images.length <= 9 ? images : images.slice(0, 9)
              }
            })
          }
        }
      })
    },
    // 限制标题字数
    handleTitleInput (e) {
      this.titleCount = e.target.value.length
    },
    // 限制标题字数
    handleContentInput (e) {
      this.contentCount = e.target.value.length
    },
    // 全屏预览图片
    handleImagePreview (e) {
      console.log(e)
      let idx = e.target.dataset.idx
      let images = this.imagesList
      wx.previewImage({
        current: images[idx], // 当前预览的图片索引
        urls: images // 所有要预览的图片
      })
    },
    // 移除不想要的图
    removeImage (e) {
      const that = this
      const idx = e.target.dataset.idx // 当前需要移除的图片索引
      wx.showModal({
        title: '提示',
        content: '您确定删除这张照片吗?',
        success (res) {
          if (res.confirm) {
            that.imagesList.splice(idx, 1)
            toast('删除成功')
          } else if (res.cancel) {
            console.log('用户点击取消')
          }
        }
      })
    },
    // 发布文章
    onGotUserInfo (e) {
      if (this.title === '') {
        toast('请输入文章标题', 'none')
        return false
      }
      if (this.content === '') {
        toast('请输入文章内容', 'none')
        return false
      }
      if (this.imagesList.length === 0) {
        toast('您还没上传图片', 'none')
        return false
      }
      this.userInfo = e.target.userInfo
      this.getOpenId()
    },
    // 往数据库里写数据
    sendMessage () {
      const that = this
      const db = wx.cloud.database()
      const diary = db.collection('diary')
      diary.add({
        data: {
          title: that.title, // 正文标题
          content: that.content, // 正文内容
          imagesList: that.imagesList, // 上传图片 list
          avatarUrl: that.userInfo.avatarUrl, // 头像
          nickname: that.userInfo.nickName, // 名字
          preview: 0, // 预览数
          fabulous: 0, // 点赞数
          creatTime: getNowFormatDate()
        }
      }).then(res => {
        toast('发布成功')
        that.title = that.content = ''
        that.titleCount = that.contentCount = 0
        that.imagesList = []
      })
    },
}
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末尾

在使用云开发中需要将如下代码放到根目录的 src/main.js中

wx.cloud.init({
  env: '云开发环境ID'
})
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app.json 文件下添加 "cloud": true 告诉小程序使用云开发, project.config.json文件下添加 "cloudfunctionRoot": "static/functions/",指定存放云函数的目录

转载于:https://juejin.im/post/5d0999e3518825403d147723

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