Swift钥匙链状态-50

我试图使用swift中的钥匙链来保存密码，但当我尝试调用save方法时，它返回的状态为-50

以下是我的功能：

 class func save(key: String, data: String) -> OSStatus {
        let query = [
            kSecClass as String       : kSecClassGenericPassword as String,
            kSecAttrAccount as String : key,
            kSecValueData as String   : data ]

        SecItemDelete(query as CFDictionary)

        return SecItemAdd(query as CFDictionary, nil)
    }

 class func load(key: String) -> String? {
        let query = [
            kSecClass as String       : kSecClassGenericPassword,
            kSecAttrAccount as String : key,
            kSecReturnData as String  : kCFBooleanTrue!,
            kSecMatchLimit as String  : kSecMatchLimitOne ] as [String : Any]

        var dataTypeRef: AnyObject? = nil

        let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)

        if status == noErr {
            return dataTypeRef as! String?
        } else {
            return nil
        }
    }

let status = KeyChain.save(key: "Ufde", data: "Eli")
                    print("status: ", status)
                    let receivedData = KeyChain.load(key: "Ufde") 
                        print(receivedData)

然后我尝试调用这些函数：

 class func save(key: String, data: String) -> OSStatus {
        let query = [
            kSecClass as String       : kSecClassGenericPassword as String,
            kSecAttrAccount as String : key,
            kSecValueData as String   : data ]

        SecItemDelete(query as CFDictionary)

        return SecItemAdd(query as CFDictionary, nil)
    }

 class func load(key: String) -> String? {
        let query = [
            kSecClass as String       : kSecClassGenericPassword,
            kSecAttrAccount as String : key,
            kSecReturnData as String  : kCFBooleanTrue!,
            kSecMatchLimit as String  : kSecMatchLimitOne ] as [String : Any]

        var dataTypeRef: AnyObject? = nil

        let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)

        if status == noErr {
            return dataTypeRef as! String?
        } else {
            return nil
        }
    }

let status = KeyChain.save(key: "Ufde", data: "Eli")
                    print("status: ", status)
                    let receivedData = KeyChain.load(key: "Ufde") 
                        print(receivedData)

---

这是我第一次尝试使用钥匙链，因此，如果这里有明显的错误，我很抱歉/

您将密码存储为钥匙链中的字符串。将密码字符串转换为数据

class func save(key: String, password: String) -> OSStatus {
 let data = password.data(using: .utf8)!
 let query = [
     kSecClass as String       : kSecClassGenericPassword as String,
     kSecAttrAccount as String : key,
     kSecValueData as String   : data]
     SecItemDelete(query as CFDictionary)
     return SecItemAdd(query as CFDictionary, nil)
}

---

我不太确定，但你确定它是

-5

而不是

-50

？我有预感SecItemDelete会让你失败，而且据我所知，通用密码的

kSecAttrAccount

不是唯一的。我注意到的另一件事是，您在保存时说

kSecClassGenericPassword as String

，忽略

as String

。最后一点我想指出的是，

kSecValueData

需要

Data

，或者就此而言

CFData

。在保存之前，请先尝试转换您的

字符串