注册按钮点击功能

Question

user.signUpInBackground{ (success: Bool, error:Error?) in
    if success{
        print("signed up")
        UserDefaults.standard.set(user.username, forKey: "username")
        UserDefaults.standard.synchronize()
        user.signUpInBackground {(success: Bool, error: Error?) in
            if success {
                print("signed up")
                AVUser.logInWithUsername(inBackground: user.username!, password: user.password!, block: {(user: AVUser?, error: Error?) in
                    if let user = user {
                        UserDefaults.standard.set(user.username, forKey: "username")
                        UserDefaults.standard.synchronize()
                        let appDelegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate
                        appDelegate.login()
                    }
                })
            }else {
                print(error!.localizedDescription)
            }
        }
    }
}

我正在编写一个类似于 Instagram 的应用程序。当人们点击登录按钮时，这是代码的一部分。我发现这很难理解。为什么 UserDefaults.standard 和 if success 在上面的代码中重复？感谢您的关注。

Answer 1

你试过这样吗..有什么问题吗？ :

 user.signUpInBackground {(success: Bool, error: Error?) in
                if success {
                    print("signed up")
                    AVUser.logInWithUsername(inBackground: user.username!, password: user.password!, block: {(user: AVUser?, error: Error?) in
                        if let user = user {
                            UserDefaults.standard.set(user.username, forKey: "username")
                            UserDefaults.standard.synchronize()
                            let appDelegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate
                            appDelegate.login()
                        }
                    })
                }else {
                    print(error!.localizedDescription)
                }
            }

我似乎 user.signUpInBackground 调用了两次方法。所以UserDefaults.standard成功重复

注册按钮点击功能

Sign up button clicked function

ios

swift

swiftyuserdefaults