swift - 不使用分段控制（Swift）切换黑暗和光明

Question

好吧，我正在尝试为带有分段索引的 cookie 点击器制作一个明暗主题，但是当我切换时没有任何反应，如果有人可以帮助我，我真的很困惑，我将非常感激。

我试过改变 else if。删除代码只是在它的广告中尝试打印语句，如果函数

//
//  ViewController.swift
//  clicker
///Users/ishaanrao/Desktop/Swift/clicker/clicker/Base.lproj/Main.storyboard
//  Created by Ishaan Rao on 8/1/19.
//  Copyright © 2019 Ishaan Rao. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    //Properties

    var x: Int = 0
    @IBOutlet weak var selector: UISegmentedControl!
    @IBOutlet weak var resetbtn: UIButton!
    @IBOutlet weak var score: UILabel!
    @IBOutlet var back: UIView!

    //viewDidLoad

    override func viewDidLoad() {
        super.viewDidLoad()
        resetbtn.backgroundColor = UIColor.black
        resetbtn.setTitle("Reset", for: .normal)
        resetbtn.setTitleColor(.white, for: .normal)
        resetbtn.layer.masksToBounds = true
        resetbtn.layer.cornerRadius = 5
        score.backgroundColor = UIColor.blue
        score.layer.masksToBounds = true
        score.layer.cornerRadius = 5
        score.textColor = UIColor.white
        score.textAlignment = .center

        // Do any additional setup after loading the view.
    }

    //methods

    @IBAction func cookie(_ sender: Any) {
        x += 1
        score.text = "Score: \(x)"
    }

    @IBAction func reset(_ sender: Any) {
        x = 0
        score.text = "Score: \(x)"
    }

    @IBAction func darl(_ sender: Any, forEvent event: UIEvent) {
    }

    @IBAction func light(_ sender: Any)  {
        if selector.selectedSegmentIndex==0 {
            resetbtn.backgroundColor = UIColor.black
            resetbtn.setTitle("Reset", for: .normal)
            resetbtn.setTitleColor(.white, for: .normal)
            resetbtn.layer.masksToBounds = true
            resetbtn.layer.cornerRadius = 5
            score.backgroundColor = UIColor.blue
            score.layer.masksToBounds = true
            score.layer.cornerRadius = 5
            score.textColor = UIColor.white
            score.textAlignment = .center
        } else if selector.selectedSegmentIndex==1 {
            back.backgroundColor = .black
            resetbtn.backgroundColor = UIColor.white
            resetbtn.setTitle("Reset", for: .normal)
            resetbtn.setTitleColor(.black, for: .normal)
            resetbtn.layer.masksToBounds = true
            resetbtn.layer.cornerRadius = 5
            score.backgroundColor = UIColor.orange
            score.layer.masksToBounds = true
            score.layer.cornerRadius = 5
            score.textColor = UIColor.black
            score.textAlignment = .center
        }
    }



}

我希望它改变颜色，但它不是没有错误

Answer 1

似乎IBAction只是没有链接到按钮事件。尝试将Storyboard按钮TouchUpInside事件链接到如下操作：

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