上传图片分辨率，像素大小限制

原文

      // 上传图片
      handleBeforeUploadCompanyLogo(file) { // 企业logo befoe
          var that = this
          const _URL = window.URL || window.webkitURL
          const isSize = new Promise((res,rej) => {
              const image = new Image()
              image.onload = function() {
                  this.width >560 ||this.height>560?rej():res()
              }
              image.src = _URL.createObjectURL(file)
          }).then(()=>{
              return file
          },()=>{
              that.$Notice.error({
                  title: '请选择小于560*560大小的图片',
              })
              return Promise.reject()
          })
          return isSize
      },