---
title: FSUnaryFileSystem
framework: fskit
role: symbol
role_heading: Class
path: fskit/fsunaryfilesystem
---

# FSUnaryFileSystem

An abstract base class for implementing a minimal file system.

## Declaration

```swift
class FSUnaryFileSystem
```

## Overview

Overview FSUnaryFileSystem is a simplified file system, which works with one FSResource and presents it as one FSVolume. The one volume and its container have a shared state and lifetime, a more constrained life cycle than the FSFileSystem design flow. Implement your app extension by providing a subclass of FSUnaryFileSystem as a delegate object. Your delegate also needs to implement the FSUnaryFileSystemOperations protocol so that it can load resources.

## Topics

### Implementing operations

- [FSUnaryFileSystemOperations](fskit/fsunaryfilesystemoperations.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [FSFileSystemBase](fskit/fsfilesystembase.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### File systems

- [FSFileSystemBase](fskit/fsfilesystembase.md)
- [FSFileName](fskit/fsfilename.md)