尝试创建在 swift 上按下时访问按钮的方法？

Question

import UIKit
import SpriteKit
import GameplayKit

struct Question {   
    var Question : String!
    var Answers : [String]!
    var AnswerNumber : Int!
}

class LevelOne: SKScene {
    
    var button = Button()
    
    var buttons = [Button]()
    let Question_met = UILabel(frame: CGRect(x: 0.3, y: 0.3, width: 40, height: 21))
    
    var Questions = [Question]()
       
    var QNumber = Int()
    
    var buttonNames = [""]
    
    override func didMove(to view: SKView) {
        
        let background = SKSpriteNode(imageNamed: "background")
        background.position = CGPoint(x: self.size.width/2, y: self.size.height/2)
        background.zPosition = 0
        self.addChild(background)
        
        QuestionFunction()
        
        ButtonFuction()
         
        PickQuestion()
        
    }
    
    @objc func QuestionFunction(){
        
        Questions = [Question(Question: "What is a Car ?", Answers: ["Bat","Cat","Vehicle","Pat"], AnswerNumber: 3),
        
        Question(Question: "What is a plane ?", Answers: ["Bat","Aircraft","Cat","Pat"], AnswerNumber: 2),
        
        Question(Question: "What is a ant ?", Answers: ["Bat","Cat","Vegetable","Insect"], AnswerNumber: 4),
        
        Question(Question: "What is a Apple ?", Answers: ["Bat","Cat","Fruit","Pat"], AnswerNumber: 3),]
        
        Question_met.frame = CGRect(x: 330, y: 70, width: 200, height: 21)
        Question_met.backgroundColor = UIColor.orange
        Question_met.textColor = UIColor.white
        Question_met.textAlignment = NSTextAlignment.center
        Question_met.text = "What caused Global Warming ?"
        self.view?.addSubview(Question_met)
        
    }
    
    @objc func ButtonFuction(){
        
        let stacView = UIStackView()
        stacView.spacing = 12
        stacView.distribution = .fillEqually
        stacView.axis = .horizontal
        stacView.translatesAutoresizingMaskIntoConstraints = false
        view!.addSubview(stacView)
        
        buttonNames = ["One","Two","Three","Four"]
        
        for name in buttonNames {
            button = Button()
            button.setTitle(name, for: .normal)
            stacView.addArrangedSubview(button)
            buttons.append(button)
        }
    
        NSLayoutConstraint.activate([stacView.centerXAnchor.constraint(equalTo: view!.centerXAnchor),stacView.centerYAnchor.constraint(equalTo: view!.centerYAnchor),stacView.widthAnchor.constraint(equalToConstant: 350),stacView.heightAnchor.constraint(equalToConstant:70)])
        
    }
    
    @objc func PickQuestion(){
        
        if Questions.count > 0{
            QNumber = 0
            Question_met.text = Questions[QNumber].Question
            
            for i in 0..<buttons.count{
                buttons[i].setTitle(Questions[QNumber].Answers[i], for: .normal)
            }
            Questions.remove(at: QNumber)
        }
        else {
            print("Done!")
        }
    }
    
    @objc func handleButton() {
        
        print("")
        
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    

    }
}

我创建了一个基于测验的游戏并手动编程了我的按钮，但不确定如何创建在按下按钮时处理的方法。

Answer 1

不完全确定你在问什么，所以要说明我认为你在问什么。

您只是在询问如何将按钮连接到操作。

你的按钮在循环中被声明为 button = UIButton() 然后动作将是下面声明的 handleButton 方法。

您只需对按钮执行 addTarget(:)。

button.addTarget(self, action:#selector(handleButton), for: .touchUpInside)

您可以 google Swift Classname，即 Swift UIButton 来确定 class 的方法。比如在UIButton里面，我们可以看到有一个方法标识为addTarget(_:action:for).

来自 Apple 的文档：

You connect a button to your action method using the addTarget(_:action:for:) method or by creating a connection in Interface Builder. The signature of an action method takes one of three forms, which are listed in Listing 1. Choose the form that provides the information that you need to respond to the button tap.

编辑： OP 决定询问如何在循环中分配按钮功能。为此，您需要一个可以引用的函数列表 Selector。

let selectors:[Selector] = [#selector(handleButton1), #selector(handleButton2, #selector(handleButton3)]

for i in 0..<3 {
    button.addTarget(self, action: selectors[i], for: .touchUpInside)
}

尝试创建在 swift 上按下时访问按钮的方法？

Trying to create method to access the buttons when pressed on swift?

swift

xcode

button

sprite-kit

skspritenode