var p = plus.io.convertLocalFileSystemURL('canvas截取的链接'); //拼成完整本地链接 
  //上传到服务器
				http.uploadFiles(api.uploadFile,['file:///' + p]).then(res => {
					if (1 == res.code) {
						this.editFaceUrl(http.baseUrl + res.data)
						// this.url = http.baseUrl + res.data
					}
				})