-执行到这  任何提示也没有。。。。 代码如下： //下载文件         downfile: function () {                 const manage = wx.getFileSystemManager();                 wx.downloadFile({                         url: "http://www.zzs5.com/uploadfile/2017/0320/20170320122300245.rar",                         success: function (res) {                                 console.log(res);                                 var savePath = "${ wx.env.USER_DATA_PATH }/save/";                                 manage.rename({                                         oldPath: res.tempFilePath,                                         newPath: savePath,                                         success: function (res) {                                                 console.log(res.tempFilePath);                                         }                                 });                         }                 });         }, console最后的提示是 console.log(res);的信息。 就啥都没了。temp 文件夹下有下载的文件， log记录这是最后一条 2019-3-19 11:5:46 [log] wx.downloadFile success callback with msg downloadFile:ok 这是咋回事？？