How to convert array of bytes [UInt8] into hexa string in Swift

I found how to convert hexa string into bytes [UInt8] but I have not found how to convert bytes [UInt8] into an hexa string in Swift

this hexstring convert to string code:

static func bytesConvertToHexstring(byte : [UInt8]) -> String {

    var string = ""



    for val in byte {

        //getBytes(&byte, range: NSMakeRange(i, 1))

        string = string + String(format: "%02X", val)

    }



    return string

}

samething like this result:

"F063C52A6FF7C8904D3F6E379EB85714ECA9C1CB1E8DFD6CA5D3B4A991269D60F607C565C327BD0ECC0985F74E5007E0D276499E1ADB4E0C92D8BDBB46E57705B2D5390FF5CBD4ED1B850C537301CA7E"

UInt8 array: [0, 11, 8, 15, 6, 6, 5, 8, 8, 4, 14, 14, 0, 0, 9, 12, 6, 4, 10, 6, 4, 8, 6, 2, 14, 2, 6, 13, 3, 3, 12, 4, 3, 12, 8, 13, 14, 4, 10, 1, 12, 15, 4, 0, 14, 14, 0, 8, 8, 14, 6, 15, 2, 2, 9, 15, 13, 6, 2, 6, 8, 15, 4, 2, 12, 1, 0, 13, 13, 4, 6, 0, 9, 6, 8, 2, 7, 0, 6, 1, 3, 3, 9, 15, 5, 7, 12, 8, 7, 5, 13, 14, 15, 6, 7, 6, 12, 6, 7, 7, 11, 9, 6, 0, 14, 5, 6, 14, 1, 5, 13, 10, 12, 13, 14, 2, 13, 14, 4, 7, 13, 0, 3, 10, 6, 11, 9, 12, 7, 11, 5, 3, 5, 11, 4, 9, 6, 10, 14, 0, 11, 7, 15, 9, 3, 14, 5, 1, 10, 14, 5, 6, 12, 4, 12, 14, 4, 3, 9, 8, 0]

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

1

Your bytes array and result don't match. How is 0 converted to an F in hex?

– Code Different
Nov 5 '15 at 14:40

Something like this stackoverflow.com/a/30198375/1187415 ?

– Martin R
Nov 5 '15 at 15:08

@Zoff Dino, Yes you are right. I give some example code. 'string convert hex string' method work correct

– Clever
Nov 6 '15 at 5:17

add a comment |

I found how to convert hexa string into bytes [UInt8] but I have not found how to convert bytes [UInt8] into an hexa string in Swift

this hexstring convert to string code:

static func bytesConvertToHexstring(byte : [UInt8]) -> String {

    var string = ""



    for val in byte {

        //getBytes(&byte, range: NSMakeRange(i, 1))

        string = string + String(format: "%02X", val)

    }



    return string

}

samething like this result:

"F063C52A6FF7C8904D3F6E379EB85714ECA9C1CB1E8DFD6CA5D3B4A991269D60F607C565C327BD0ECC0985F74E5007E0D276499E1ADB4E0C92D8BDBB46E57705B2D5390FF5CBD4ED1B850C537301CA7E"

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

1

Your bytes array and result don't match. How is 0 converted to an F in hex?

– Code Different
Nov 5 '15 at 14:40

Something like this stackoverflow.com/a/30198375/1187415 ?

– Martin R
Nov 5 '15 at 15:08

@Zoff Dino, Yes you are right. I give some example code. 'string convert hex string' method work correct

– Clever
Nov 6 '15 at 5:17

add a comment |

I found how to convert hexa string into bytes [UInt8] but I have not found how to convert bytes [UInt8] into an hexa string in Swift

this hexstring convert to string code:

static func bytesConvertToHexstring(byte : [UInt8]) -> String {

    var string = ""



    for val in byte {

        //getBytes(&byte, range: NSMakeRange(i, 1))

        string = string + String(format: "%02X", val)

    }



    return string

}

samething like this result:

"F063C52A6FF7C8904D3F6E379EB85714ECA9C1CB1E8DFD6CA5D3B4A991269D60F607C565C327BD0ECC0985F74E5007E0D276499E1ADB4E0C92D8BDBB46E57705B2D5390FF5CBD4ED1B850C537301CA7E"

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

I found how to convert hexa string into bytes [UInt8] but I have not found how to convert bytes [UInt8] into an hexa string in Swift

this hexstring convert to string code:

static func bytesConvertToHexstring(byte : [UInt8]) -> String {

    var string = ""



    for val in byte {

        //getBytes(&byte, range: NSMakeRange(i, 1))

        string = string + String(format: "%02X", val)

    }



    return string

}

samething like this result:

"F063C52A6FF7C8904D3F6E379EB85714ECA9C1CB1E8DFD6CA5D3B4A991269D60F607C565C327BD0ECC0985F74E5007E0D276499E1ADB4E0C92D8BDBB46E57705B2D5390FF5CBD4ED1B850C537301CA7E"

swift

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

edited Oct 16 '17 at 5:28

Leo Dabus

132k30269345

asked Nov 5 '15 at 14:21

Clever

77312

asked Nov 5 '15 at 14:21

Clever

77312

asked Nov 5 '15 at 14:21

Clever

77312

1

Your bytes array and result don't match. How is 0 converted to an F in hex?

– Code Different
Nov 5 '15 at 14:40

Something like this stackoverflow.com/a/30198375/1187415 ?

– Martin R
Nov 5 '15 at 15:08

@Zoff Dino, Yes you are right. I give some example code. 'string convert hex string' method work correct

– Clever
Nov 6 '15 at 5:17

add a comment |

1

Your bytes array and result don't match. How is 0 converted to an F in hex?

– Code Different
Nov 5 '15 at 14:40

Something like this stackoverflow.com/a/30198375/1187415 ?

– Martin R
Nov 5 '15 at 15:08

@Zoff Dino, Yes you are right. I give some example code. 'string convert hex string' method work correct

– Clever
Nov 6 '15 at 5:17

Your bytes array and result don't match. How is 0 converted to an F in hex?

– Code Different
Nov 5 '15 at 14:40

Something like this stackoverflow.com/a/30198375/1187415 ?

– Martin R
Nov 5 '15 at 15:08

@Zoff Dino, Yes you are right. I give some example code. 'string convert hex string' method work correct

– Clever
Nov 6 '15 at 5:17

add a comment |

1 Answer
1

active

oldest

votes

Xcode 9 or later • Swift 4 or later

extension String {

    var hexaBytes: [UInt8] {

        var position = startIndex

        return (0..<count/2).flatMap { _ in    // for Swift 4.1 or later use compactMap instead of flatMap

            defer { position = index(position, offsetBy: 2) }

            return UInt8(self[position...index(after: position)], radix: 16)

        }

    }

    var hexaData: Data { return hexaBytes.data }

}



extension Collection where Element == UInt8 {

    var data: Data {

        return Data(self)

    }

    var hexa: String {

        return map{ String(format: "%02X", $0) }.joined()

    }

}

"0f00ff".hexaBytes           // [15, 0, 255]

"0f00ff".hexaData            // 3 bytes

"0f00ff".hexaData.hexa       // "0F00FF"

"0f00ff".hexaData as NSData  // <0f00ff>

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

1

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

add a comment |

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1 Answer
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1 Answer
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oldest

votes

Xcode 9 or later • Swift 4 or later

extension String {

    var hexaBytes: [UInt8] {

        var position = startIndex

        return (0..<count/2).flatMap { _ in    // for Swift 4.1 or later use compactMap instead of flatMap

            defer { position = index(position, offsetBy: 2) }

            return UInt8(self[position...index(after: position)], radix: 16)

        }

    }

    var hexaData: Data { return hexaBytes.data }

}



extension Collection where Element == UInt8 {

    var data: Data {

        return Data(self)

    }

    var hexa: String {

        return map{ String(format: "%02X", $0) }.joined()

    }

}

"0f00ff".hexaBytes           // [15, 0, 255]

"0f00ff".hexaData            // 3 bytes

"0f00ff".hexaData.hexa       // "0F00FF"

"0f00ff".hexaData as NSData  // <0f00ff>

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

1

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

add a comment |

Xcode 9 or later • Swift 4 or later

extension String {

    var hexaBytes: [UInt8] {

        var position = startIndex

        return (0..<count/2).flatMap { _ in    // for Swift 4.1 or later use compactMap instead of flatMap

            defer { position = index(position, offsetBy: 2) }

            return UInt8(self[position...index(after: position)], radix: 16)

        }

    }

    var hexaData: Data { return hexaBytes.data }

}



extension Collection where Element == UInt8 {

    var data: Data {

        return Data(self)

    }

    var hexa: String {

        return map{ String(format: "%02X", $0) }.joined()

    }

}

"0f00ff".hexaBytes           // [15, 0, 255]

"0f00ff".hexaData            // 3 bytes

"0f00ff".hexaData.hexa       // "0F00FF"

"0f00ff".hexaData as NSData  // <0f00ff>

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

1

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

add a comment |

Xcode 9 or later • Swift 4 or later

extension String {

    var hexaBytes: [UInt8] {

        var position = startIndex

        return (0..<count/2).flatMap { _ in    // for Swift 4.1 or later use compactMap instead of flatMap

            defer { position = index(position, offsetBy: 2) }

            return UInt8(self[position...index(after: position)], radix: 16)

        }

    }

    var hexaData: Data { return hexaBytes.data }

}



extension Collection where Element == UInt8 {

    var data: Data {

        return Data(self)

    }

    var hexa: String {

        return map{ String(format: "%02X", $0) }.joined()

    }

}

"0f00ff".hexaBytes           // [15, 0, 255]

"0f00ff".hexaData            // 3 bytes

"0f00ff".hexaData.hexa       // "0F00FF"

"0f00ff".hexaData as NSData  // <0f00ff>

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

Xcode 9 or later • Swift 4 or later

extension String {

    var hexaBytes: [UInt8] {

        var position = startIndex

        return (0..<count/2).flatMap { _ in    // for Swift 4.1 or later use compactMap instead of flatMap

            defer { position = index(position, offsetBy: 2) }

            return UInt8(self[position...index(after: position)], radix: 16)

        }

    }

    var hexaData: Data { return hexaBytes.data }

}



extension Collection where Element == UInt8 {

    var data: Data {

        return Data(self)

    }

    var hexa: String {

        return map{ String(format: "%02X", $0) }.joined()

    }

}

"0f00ff".hexaBytes           // [15, 0, 255]

"0f00ff".hexaData            // 3 bytes

"0f00ff".hexaData.hexa       // "0F00FF"

"0f00ff".hexaData as NSData  // <0f00ff>

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

edited Nov 13 '18 at 11:06

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

answered Nov 5 '15 at 15:14

Leo Dabus

132k30269345

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

1

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

add a comment |

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

1

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

thanks answer but i need bytes array convert to string or hexstring convert to string. give me same example plz

– Clever
Nov 6 '15 at 5:21

Very elegant. Only thing better would be to add the reverse as well.

– Roy Falk
Mar 21 '16 at 11:52

Great but readability of the hex string would be better with spaces every 8 characters: 6162636465666768696a6b6c6d6e6f70 to 61626364 65666768 696a6b6c 6d6e6f70. But I guess Swift hates hex displays.

– zaph
Jun 8 '16 at 11:56

I am aware of that and do use it. What I find interesting is that Apple has switched from hex to decimal in displaying data with Swift and for many cases that just does not work as well.

– zaph
Jun 9 '16 at 12:41

add a comment |

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