在Swift 3.0 Sha 256encryption语法错误

func SHA256() -> String { let data = self.data(using: String.Encoding.utf8) let res = NSMutableData(length: Int(CC_SHA256_DIGEST_LENGTH)) CC_SHA256((data! as NSData).bytes, CC_LONG(data!.count), UnsafeMutablePointer(res!.mutableBytes)) let hashedString = "\(res!)".replacingOccurrences(of: "", with: "").replacingOccurrences(of: " ", with: "") let badchar: CharacterSet = CharacterSet(charactersIn: "\"<\",\">\"") let cleanedstring: String = (hashedString.components(separatedBy: badchar) as NSArray).componentsJoined(by: "") return cleanedstring } 

我正在使用此函数来encryption它在swift 2中正常工作的string，现在它不能在swift 3.0中工作

Answer 1

完美的解决schemeSwift 3+：

  extension String { // MARK: - SHA256 func get_sha256_String() -> String { guard let data = self.data(using: .utf8) else { print("Data not available") return "" } return getHexString(fromData: digest(input: data as NSData)) } private func digest(input : NSData) -> NSData { let digestLength = Int(CC_SHA256_DIGEST_LENGTH) var hashValue = [UInt8](repeating: 0, count: digestLength) CC_SHA256(input.bytes, UInt32(input.length), &hashValue) return NSData(bytes: hashValue, length: digestLength) } private func getHexString(fromData data: NSData) -> String { var bytes = [UInt8](repeating: 0, count: data.length) data.getBytes(&bytes, length: data.length) var hexString = "" for byte in bytes { hexString += String(format:"%02x", UInt8(byte)) } return hexString } } 

如何使用：

 let desiredSHA256 = "yourString".get_sha256_String() 

Answer 2

 func sha256(string: String) -> Data? { guard let messageData = string.data(using:String.Encoding.utf8) else { return nil; } var digestData = Data(count: Int(CC_SHA256_DIGEST_LENGTH)) _ = digestData.withUnsafeMutableBytes {digestBytes in messageData.withUnsafeBytes {messageBytes in CC_SHA256(messageBytes, CC_LONG(messageData.count), digestBytes) } } return digestData } 

例：

 let testString = "sha me" print("testString: \(testString)") let shaData = sha256(string: testString) let shaHex = shaData!.map { String(format: "%02hhx", $0) }.joined() print("shaHex: \(shaHex)") 

输出：

 testString: sha me shaData: a60e0eee 30a3a4f1 c4f8b93f 16ad22cb 0339447b 1653f331 edbda55f eee00789 

什么是新的.withUnsafeMutableBytesclosures。

Answer 3

 func SHA256() -> String { let data = self.data(using: String.Encoding.utf8) let res = NSMutableData(length: Int(CC_SHA256_DIGEST_LENGTH)) CC_SHA256(((data! as NSData)).bytes, CC_LONG(data!.count), res?.mutableBytes.assumingMemoryBound(to: UInt8.self)) let hashedString = "\(res!)".replacingOccurrences(of: "", with: "").replacingOccurrences(of: " ", with: "") let badchar: CharacterSet = CharacterSet(charactersIn: "\"<\",\">\"") let cleanedstring: String = (hashedString.components(separatedBy: badchar) as NSArray).componentsJoined(by: "") return cleanedstring } 

取代CC_SHA256（（data！as NSData）.bytes，CC_LONG（data！.count），UnsafeMutablePointer（res！.mutableBytes））