https://github.com/jrendel/SwiftKeychainWrapper

普通用法

Add a string value to keychain:

let saveSuccessful: Bool = KeychainWrapper.standard.set("Some String", forKey: "myKey")

Retrieve a string value from keychain:

let retrievedString: String? = KeychainWrapper.standard.string(forKey: "myKey")

Remove a string value from keychain:

let removeSuccessful: Bool = KeychainWrapper.standard.removeObject(forKey: "myKey")

在应用程序间共享

let uniqueServiceName = "customServiceName"
let uniqueAccessGroup = "sharedAccessGroupName"
let customKeychainWrapperInstance = KeychainWrapper(serviceName: uniqueServiceName, accessGroup: uniqueAccessGroup)

The custom instance can then be used in place of the shared instance or static accessors:

let saveSuccessful: Bool = customKeychainWrapperInstance.set("Some String", forKey: "myKey")

let retrievedString: String? = customKeychainWrapperInstance.string(forKey: "myKey")

let removeSuccessful: Bool = customKeychainWrapperInstance.removeObject(forKey: "myKey")