如何遍历 Assets 文件夹中的子文件夹？答案

【问题标题】：How can I loop over sub folders in Assets folder?如何遍历 Assets 文件夹中的子文件夹？
【发布时间】：2020-06-03 05:40:29
【问题描述】：

string selectedPath = GetPath();
var subFolders = AssetDatabase.GetSubFolders(selectedPath);
List<string> paths = new List<string>();
foreach(string path in subFolders)
{
    paths.Add(path);
}

例如 subFolders 是 Assets/My Folder 但在我的文件夹下还有更多的子文件夹。

AssetDatabase.GetSubFolders 不会进行递归，它只获取第一个子文件夹。我想让所有子文件夹递归。

我试过了：

列表路径 = new List(); foreach（子文件夹中的字符串路径） { 路径。添加（路径）； }

但它仍然只给我第一个子文件夹。

这就是我在资产中获取所选路径名的方式：

[MenuItem("Assets/Get Path")]
private static string GetClickedDirFullPath()
{
    string clickedAssetGuid = Selection.assetGUIDs[0];
    string clickedPath = AssetDatabase.GUIDToAssetPath(clickedAssetGuid);
    string clickedPathFull = Path.Combine(Directory.GetCurrentDirectory(), clickedPath);

    FileAttributes attr = File.GetAttributes(clickedPathFull);
    return attr.HasFlag(FileAttributes.Directory) ? clickedPathFull : Path.GetDirectoryName(clickedPathFull);
}

[MenuItem("Assets/Get Path")]
private static string GetPath()
{
    string path = GetClickedDirFullPath();
    int index = path.IndexOf("Assets");
    string result = path.Substring(index);

    return result;
}

【问题讨论】：

标签： c# unity3d

【解决方案1】：

您可以简单地使用List<T>.AddRange 使其递归

private static string[] GetSubFoldersRecursive(string root)
{
    var paths = new List<string>();

    // If there are no further subfolders then AssetDatabase.GetSubFolders returns 
    // an empty array => foreach will not be executed
    // This is the exit point for the recursion
    foreach (var path in AssetDatabase.GetSubFolders(root))
    {
        // add this subfolder itself
        paths.Add(path);

        // If this has no further subfolders then simply no new elements are added
        paths.AddRange(GetSubFoldersRecursive(path));
    }

    return paths.ToArray();
}

例如

[ContextMenu("Test")]
private void Test()
{
    var sb = new StringBuilder();

    var folders = SubFolders("Assets");

    if(folders.Length > 0)
    {
        foreach (var folder in SubFolders("Assets"))
        {
            sb.Append(folder).Append('\n');
        }
    }
    else
    {
        sb.Append(" << The given path has no subfolders! >>");
    }

    Debug.Log(sb.ToString());
}

将打印出整个项目的文件夹结构。

对于

我明白了

Assets/Example 1
Assets/Example 1/SubFolder A
Assets/Example 1/SubFolder B
Assets/Example 1/SubFolder C
Assets/Example 2
Assets/Example 2/SubFolder A
Assets/Example 2/SubFolder A/SubSubFolder A

所以你的情况是

string selectedPath = GetPath();
var folders = SubFolders(selectedPath);
foreach(var path in folders)
{
    ...
}

【讨论】：

【解决方案2】：

试试这个代码来获取递归文件夹路径

    //this is your code
    string selectedPath = GetPath();
    var subFolders = AssetDatabase.GetSubFolders(selectedPath);
    List<string> paths = new List<string>();
    if(subFolders != null)
    {
        foreach(string path in subFolders)
        {
            GetAllRecursiveFolder(path,ref paths);
        }
    }
    else
    {
        paths.add(selectedPath);
    }


    public void GetAllRecursiveFolder(string currentPath,ref List<string> paths)
    {

        var subFolders = AssetDatabase.GetSubFolders(currentPath);
        if(subFolders != null)
        {
            foreach(string path in subFolders)
            {
                GetAllRecursiveFolder(path,ref paths);// Get recursive folder path, and stored in ref variable
            }
        }
        else
        {
            paths.add(currentPath);
        }

    }

【讨论】：