https://developers.weixin.qq.com/miniprogram/dev/api/media/image/wx.chooseMessageFile.html

wx.chooseMessageFile({
  count: 10,
  type: 'image',
  success (res) {
    // tempFilePath可以作为img标签的src属性显示图片
   const tempFilePaths = res.tempFilePaths  
}})
tempFilePaths 应该换成  tempFiles