CODEWITHSUNDEEP
swifttype-conversion
Mads Gadeberg
Mads Gadeberg

Reputation: 1480

How to convert Byte to String?

I need to convert my Byte to a String because

- (NSInteger)write:(const uint8_t *)buffer maxLength:(NSUInteger)

takes a String as its first parameter.

What I want:

func sendMessage(message: Byte) -> Int {
    return outputStream!.write(message, maxLength: 1)
}

Upvotes: 2

Views: 4653

Answers (5)

Teo Sartori
Teo Sartori

Reputation: 1112

For others who came here for the answer to the question:
"How do I convert an Array of bytes into a Swift String" :

String(bytes: byteArray, encoding: NSUTF8StringEncoding)

which returns a String? (Optional<String>).

Upvotes: 0

Tom Pelaia
Tom Pelaia

Reputation: 1285

You can convert a UnicodeScalar to a String as such:

let theString = String(UnicodeScalar(theByte))

Or you can do it one Character at a time:

let theChar = Character(UnicodeScalar(theByte))

Upvotes: 0

Marcus Rossel
Marcus Rossel

Reputation: 3258

The documentation for NSOutputStream actually shows what @Kirsteins suggested, when looking at the Swift version of the method:

func write(_ buffer: UnsafePointer<UInt8>, maxLength length: Int) -> Int

Upvotes: 0

Kirsteins
Kirsteins

Reputation: 27335

You don't have to provide string, but UnsafePointer<UInt8>. Just prepend message with &:

return outputStream!.write(&message, maxLength: 1)

Upvotes: 3

Ramesh
Ramesh

Reputation: 617

Try this

var char = 97

let str = NSString(bytes: &char, length: 1, encoding: NSUTF8StringEncoding)

Upvotes: 0

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