小编Bur*_*ner的帖子

我一直在尝试使用cordova 将名为versions.txt 的文件从applicationDirectory 复制到externalApplicationStorageDirectory，但代码失败。

这是代码

var path = cordova.file.applicationDirectory + "www/Data/versions.txt";

      window.resolveLocalFileSystemURL(path,
      function gotFile(fileEntry)
      {

          window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,
              function onSuccess(fileSystem)
              { 
                      var directory = new DirectoryEntry("versions.txt", path);

                      fileEntry.copyTo(directory, 'versions.txt',
                          function()
                          {
                              alert('copying was successful')
                          },
                          function()
                          {
                              alert('unsuccessful copying')
                          });

              }, null);
      },null);

有什么帮助吗？