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Convert NSData bytes to hexadecimal string
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| import Foundation | |
| extension NSData { | |
| /// Return hexadecimal string representation of NSData bytes | |
| @objc(kdj_hexadecimalString) | |
| public var hexadecimalString: NSString { | |
| let buffer = malloc(UInt(length)) | |
| getBytes(buffer, length: length) | |
| let byteArray = UnsafePointer<UInt8>(buffer) | |
| var hexString: NSMutableString = NSMutableString() | |
| for i in 0..<length { | |
| let byte: UInt8 = byteArray[i] | |
| hexString.appendFormat("%02x", UInt(byte)) | |
| } | |
| free(buffer) | |
| return NSString(string: hexString) | |
| } | |
| } |
@ast UnsafePointer does not conform to SequenceType
Or simply with one line return self.map{ String(format: "%02x", $0) }.joined()
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It's not necessary to copy the bytes.