| path | 文件系统中文件夹的物理路径。 |
| projectPath | 文件夹的项目路径。 |
| sourceTree | 路径相对的源代码树。默认情况下，它是 PBXSourceTree.Source。PBXSourceTree.Group 树不受支持。 |
string 已添加的文件夹引用的 GUID。它稍后可用于将构建文件添加到目标，等等。
向已知文件列表添加一个新的文件夹引用。
组结构会自动创建，以对应于项目路径。要将文件夹引用添加到要构建的文件列表，请将返回的值传递给 AddFileToBuild。
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