---
title: "init(unsafeUninitializedCapacity:initializingUTF8With:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/string/init(unsafeuninitializedcapacity:initializingutf8with:)"
---

# init(unsafeUninitializedCapacity:initializingUTF8With:)

## Declaration

```swift
init<E>(unsafeUninitializedCapacity capacity: Int, initializingUTF8With initializer: (UnsafeMutableBufferPointer<UInt8>) throws(E) -> Int) throws(E) where E : Error
```

## See Also

### Creating a String

- [init(decoding:)](swift/string/init(decoding:)-nm7v.md)
- [init()](swift/string/init().md)
- [init(_:)](swift/string/init(_:)-8v3fo.md)
- [init(_:)](swift/string/init(_:)-8og6g.md)
- [init(_:)](swift/string/init(_:)-1ip93.md)
- [init(_:)](swift/string/init(_:)-50pwi.md)
- [init(_:)](swift/string/init(_:)-14lv5.md)
- [init(repeating:count:)](swift/string/init(repeating:count:)-23xjt.md)
- [init(repeating:count:)](swift/string/init(repeating:count:)-11bpi.md)