小程序接口请求图片渲染异步解决

let imgs = res.data.map(item => {

    return {

       promise: new Promise((resolve, reject) => {

           UTILS.request("图片请求路径","POST",{

           image: item//请求参数

      }).then(res => {

         resolve(res)

      }).catch(reject)

   }),

    flag: item

  }

  })

let resultImg = imgs.map(imgObj => imgObj.promise)

    Promise.all(resultImg).then(res => {

      res.forEach((resItem, i) => {

        this.showImg(imgs[i].flag, resItem)

    })

//修改当前页面data的数据

   this.setData({

      uploadImg: {...this.data.uploadImg},

      certificatephotoData: [...this.data.certificatephotoData]

   },()=>{

//修改成功之后查看数据

   console.log(this.data.certificatephotoData)

  })