---
title: "init(bytesNoCopy:length:encoding:deallocator:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/nsstring/init(bytesnocopy:length:encoding:deallocator:)"
---

# init(bytesNoCopy:length:encoding:deallocator:)

## Declaration

```swift
convenience init?(bytesNoCopy bytes: UnsafeMutableRawPointer, length len: Int, encoding: UInt, deallocator: ((UnsafeMutableRawPointer, Int) -> Void)? = nil)
```