Преобразовать 'UnsafePointer & lt; CChar & gt;' в Swift [дубликат]

Вот решение, с которым я пришел, с использованием отражения, чтобы фактически преобразовать кортеж в [Int8] (см. Любой способ перебора кортежа в swift? ), а затем преобразует его в строку используя методыCString ... ().

func arrayForTuple<T,E>(tuple:T) -> [E] {
    let reflection = reflect(tuple)
    var arr : [E] = []
    for i in 0..<reflection.count {
        if let value = reflection[i].1.value as? E {
            arr.append(value)
        }
    }
    return arr
}

public extension String {
    public static func fromTuple<T>(tuple:T) -> String? {
        var charArray = arrayForTuple(tuple) as [Int8]
        var nameString = String.fromCString(UnsafePointer<CChar>(charArray))
        if nameString == nil {
            nameString = String.fromCStringRepairingIllFormedUTF8(UnsafePointer<CChar>(charArray)).0
        }
        return nameString
    }
}

Попробуйте следующее:

func asciiCStringToSwiftString(cString:UnsafePointer<UInt8>, maxLength:Int) -> String
{
    var swiftString = String()  // The Swift String to be Returned is Intialized to an Empty String
    var workingCharacter:UnicodeScalar = UnicodeScalar(cString[0])
    var count:Int = 0           // An Index Into the C String Array Starting With the First Character

    while cString[count] != 0             // While We Haven't reached the End of the String
    {
        workingCharacter = UnicodeScalar(cString[count]) // Convert the ASCII Character to a Unicode Scalar
        swiftString.append(workingCharacter)             // Append the Unicode Scalar Version of the ASCII Character
        count++                                          // Increment the Index to Look at the Next ASCII Character

        if count > maxLength                            // Set a Limit In Case the C string was Not NULL Terminated
        {
            if printDebugLogs == true
            {
                swiftString="Reached String Length Limit in Converting ASCII C String To Swift String"
            }
            return swiftString
        }
    }

    return swiftString                     // Return the Swift String
}

Фактически вы можете собрать кортеж в массив с помощью синтаксиса вариационных параметров Swift:

let record = getRecord()
let (int8s: Int8...) = myRecord          // int8s is an [Int8]
let uint8s = int8s.map { UInt8($0) }
let string = String(bytes: uint8s, encoding: NSASCIIStringEncoding)
// myString == Optional("12345678")