发布图片，上传图片个数

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发布图片，上传图片个数Publish pictures, the number of uploaded pictures

  chooseImage: function () {    var that = this;    wx.chooseImage({      count: 9 - that.data.cloudImgList.length,      sizeType: ['original', 'compressed'],      sourceType: ['album', 'camera'],      success(res) {        console.log(res.tempFilePaths)        // 上传图片        that.data.tempImgList = res.tempFilePaths        that.uploadImages()      },    })  },  uploadImages() {    var that = this;    for (var i = 0; i < this.data.tempImgList.length; i++) {      wx.cloud.uploadFile({        cloudPath: `actionImages/${Math.random()}_${Date.now()}.${this.data.tempImgList[i].match(/.(w+)$/)[1]}`,        filePath: this.data.tempImgList[i],        success(res) {          console.log(res.fileID)          that.data.cloudImgList.push(res.fileID)          that.setData({            cloudImgList: that.data.cloudImgList          })        }      })    }  },

Hello, everyone, I would like to ask how to set the minimum number of uploaded pictures in this code, such as uploading at least one picture, otherwise you can't publish the content and make a prompt "chooseimage: function() {var that = this wx.chooseImage ({      count: 9 -  that.data.cloudImgList .length,      sizeType: ['original',  'compressed'],      sourceType: ['album', 'camera'],      success(res) {         console.log ( res.tempFilePaths ）/ / upload pictures that.data.tempImgList  =  res.tempFilePaths          that.uploadImages ()      },    })  },  uploadImages() {    var that = this;     for (var i = 0; i <  this.data.tempImgList .length; i++) {       wx.cloud.uploadFile ({        cloudPath: `actionImages/${ Math.random ()}_ ${ Date.now ()}.${ this.data.tempImgList [i].match(/.(w+)$/)[1]}`,        filePath:  this.data.tempImgList [i],         success(res) {           console.log ( res.fileID )           that.data.cloudImgList .push( res.fileID )           that.setData ({            cloudImgList:  that.data.cloudImgList           })        }      })    }  },

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