onTextTap(event){ var posturl = this.comp('attachmentImageData').getValue('previewImageUrl'); console.log(posturl); var row = this.comp('restData').getCurrentRow(); var currenttype = this.comp('restData').getValue('fwjlx'); var zlname = this.comp('restData').getValue('fziliaomc'); console.log(zlname + currenttype); wx.downloadFile({ url:posturl, filePath: wx.env.USER_DATA_PATH + zlname + currenttype, header: {         'content-type': 'application/json' }, fail: function (msg) { console.log('失败') }, success:function(res){ var resPath = res.filePath; console.log(res.filePath); wx.openDocument({ filePath: resPath, success:function(res){ console.log('打开文档成功') }, error: function(msg) { console.log(msg) } }) } })   } [图片]