ios - 将数据传递给自定义 View 然后执行函数是一种好方法吗？

Question

我创建了一个自定义输入附件 View ，它是提交按钮。但是，我需要将数据传递给自定义 View ，然后执行进一步的功能。这是一个很好的方法吗？

class SignUpViewController: UIViewController {

    @IBOutlet weak var phoneTF: SignLogTextField!
    @IBOutlet weak var EmailTF: SignLogTextField!
    @IBOutlet weak var PasswordTF: SignLogTextField!
    @IBOutlet weak var FBBtn: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        textFieldPreparation()
    }

    func textFieldPreparation(){
        EmailTF.inputAccessoryView = Bundle.main.loadNibNamed("SignSubmitBTN", owner: self, options: nil)?.first as! SignSubmitBTN

        phoneTF.inputAccessoryView = Bundle.main.loadNibNamed("SignSubmitBTN", owner: self, options: nil)?.first as! SignSubmitBTN

        PasswordTF.inputAccessoryView = Bundle.main.loadNibNamed("SignSubmitBTN", owner: self, options: nil)?.first as! SignSubmitBTN
    }
}

我不确定如何将数据传递到自定义 View ，或者我应该在 Outlet Action 中执行 sign up 吗？

这是我的自定义 View

import UIKit

class SignSubmitBTN: UIView {
    @IBAction func submitAction(_ sender: Any) {
    }

    @IBOutlet weak var subBTN: UIButton!

    override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setup()
    }

    func setup(){}
}

如果我必须将数据传递给自定义 View ，我应该使用协议(protocol)吗？如果我应该使用协议(protocol)怎么用呢？

Answer 1

好的...

我认为您是从错误的方向来处理这个问题的。按钮的职责应该是告诉您用户点击了它，仅此而已。该按钮不应处理登录。

但是……你已经完成了这里的 90%。只需再添加几位。

您可以更新提交按钮以包含委托(delegate)并在按钮操作中使用委托(delegate)...

import UIKit

// protocol
protocol SignInButtonDelegate: class {
    func signIn()
}

class SignSubmitBTN: UIView {
    // property for delegate
    weak var delegate: SignInButtonDelegate?        

    @IBAction func submitAction(_ sender: Any) {
        // this tells the delegate to sign in
        // it doesn't need to know how that happens
        delegate?.signIn()
    }

    @IBOutlet weak var subBTN: UIButton!

    override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setup()
    }

    func setup() {}
}

然后在您的 View Controller 中您遵守委托(delegate)协议(protocol)...

extension SignUpViewController: SignInButtonDelegate {
    func signIn() {
        // here you already have access to all the data you need to sign in.
        // you are in the view controller here so just get the text from the username, password, etc...
    }
}

然后将 View Controller 设置为委托(delegate)...

func textFieldPreparation() {
    let signInButton = Bundle.main.loadNibNamed("SignSubmitBTN", owner: self, options: nil)?.first as! SignSubmitBTN
    signInButton.delegate = self

    // these are properties... they should begin with a lowercase letter
    emailTF.inputAccessoryView = signInButton 
    phoneTF.inputAccessoryView = signInButton 
    passwordTF.inputAccessoryView = signInButton 
}