<view class="main">
  <!--文字区-->
  <view class="text" >
    <textarea fixed="true" auto-height placeholder="这一刻的想法..." bindinput="setText" style="margin: 10rpx;width: 96%;max-height: 90%;"/> 
  </view>
  <!--图片区-->
  <view class="img">
    <block wx:for="{{selectImgs}}" wx:key="index">
      <image src="{{item}}" style="height: 220rpx;width: 220rpx;margin: 10rpx;"></image>
    </block>
    <image wx:if="{{selectImgs.length != 9}}" src="/image/addImg.png" bindtap="selectImg" style="height: 80rpx;width: 80rpx;padding: 70rpx;background-color: rgb(241, 236, 236);margin-top: 10rpx;"></image>
  </view>
  <view class="publish" bindtap="publish">发表</view>
</view>

.main{
  position: fixed;
  top: 10rpx;
  bottom: 10rpx;
  left: 0rpx;
  right: 0rpx;
  z-index: 0;
}
.text{
  position: fixed;
  top: 20rpx;
  left: 10rpx;
  right: 10rpx;
  height: 23%;
  background-color: white;
  border-radius: 10rpx;
  z-index: 1;
}
.img{
  position: fixed;
  display: flex;
  flex-wrap: wrap;
  top: 23%;
  left: 10rpx;
  right: 10rpx;
  bottom: 15%;
  background-color: white;
  border-radius: 10rpx;
  z-index: 1;
}
.publish{
  position: fixed;
  z-index: 1;
  top: 88%;
  width: 11%;
  left: 40%;
  background-color: rgb(8, 88, 32);
  color: white;
  font-size: 40rpx;
  border-radius: 30px;
  padding: 10rpx 30rpx;
  box-shadow: 2px 2px 10px rgb(16, 46, 33);
}

Page({
  data: {
    selectImgs: null,
    text: '',
    uploadImgs: []
  },
  selectImg(){
    wx.chooseImage({
      count: 8,
      success: (res) => {
        this.setData({
          selectImgs: res.tempFilePaths
        })
      }
    })
  },
  setText(e){
    let text = e.detail.value
    console.log(text)
    this.setData({
      text: text
    })
  },
  //发表动态
  publish(){
    this.uploadImages().then((resolve, reject) => {
      wx.showLoading({
        title: '发布中'
      })
      setTimeout(() => {}, 500)
      let imagesUrl = this.data.uploadImgs //云存储的图片列表
      let text = this.data.text
      wx.cloud.database().collection('article').add({
        data: {
          content: text,
          imagesUrl: imagesUrl
        },
        success: (res) => {
          wx.hideLoading({
            success: (res) => {
              wx.showToast({
                title: '发表成功',
              })
              wx.navigateBack({
                delta: 1,
              })
            },
          })
        }
      })
    })
  },
  //上传图片到云存储
  uploadImages() {
    let _this = this
    return new Promise(function (resolve, reject) {
      function upload(index) {
        var picnum = index+1
        wx.showLoading({
          title: '上传第' + picnum + '张图片'
        })
        wx.cloud.uploadFile({
          cloudPath: 'articleImgs/' + new Date().getTime() + '_' + Math.floor(Math.random() * 1000) + '.jpg', //给图片命名
          filePath: _this.data.selectImgs[index], //本地图片路径
          success: (res) => {
            _this.data.uploadImgs[index] = res.fileID
            wx.hideLoading({
              success: (res) => {},
            })
            //判断是否全部上传
            if (_this.data.selectImgs.length - 1 <= index) {
              console.log('已全部上传')
              resolve('success')
              return
            } else {
              console.log(index)
              upload(index + 1)
            }
          },
          fail: (err) => {
            reject('error')
            wx.showToast({
              title: '上传失败，请重新上传',
              type: 'none'
            })
          }
        })
      }
      upload(0)
    })
  },
}