Converting Hex String to NSData in Swift

Question

I got the code to convert String to HEX-String in objective-C.

- (NSString *) CreateDataWithHexString:(NSString*)inputString
{
NSUInteger inLength = [inputSt         


        

Answer 1

Swift 5

extension Data {
    init?(hex: String) {
        guard hex.count.isMultiple(of: 2) else {
            return nil
        }
        
        let chars = hex.map { $0 }
        let bytes = stride(from: 0, to: chars.count, by: 2)
            .map { String(chars[$0]) + String(chars[$0 + 1]) }
            .compactMap { UInt8($0, radix: 16) }
        
        guard hex.count / bytes.count == 2 else { return nil }
        self.init(bytes)
    }
}