接受 1 个手指和 2 个手指点击事件的 UIButton答案

【问题标题】：UIButton that accepts 1 finger and 2 finger tap events接受 1 个手指和 2 个手指点击事件的 UIButton
【发布时间】：2017-02-23 21:11:20
【问题描述】：

我正在跟踪游戏分数，其中游戏分数增加/减少 25。

我正在使用UIButtons 在按钮标签中显示分数，用 1 根手指点击手势将分数增加 25，用 2 根手指点击手势将分数减少 25。

我找不到更模块化的方式来编写此代码，每个按钮可重用的唯一功能是：

func setButtonTitleAndIncrement(index: Int, button: UIButton) -> Int {
    var index = index
    index += 25
    button.setTitle(String(index), for: .normal)
    return index
}

func setButtonTitleAndDecrement(index: Int, button: UIButton) -> Int {
    var index = index
    index -= 25
    button.setTitle(String(index), for: .normal)
    return index
}

但是对于每个按钮，除了指定特定的按钮和方法外，我必须使用相同的代码，但我无法找到解决方法。 至少我愿意接受一般的index 和button。有什么想法吗？

var index1 = 0
var index2 = 0

override func viewDidLoad() {
    super.viewDidLoad()
    let oneFingerTapButtonTeam1 = UITapGestureRecognizer(target: self, action: #selector(incrementScoreTeam1))
    oneFingerTapButtonTeam1.numberOfTouchesRequired = 1
    buttonTeam1.addGestureRecognizer(oneFingerTapButtonTeam1)

    let twoFingerTapButtonTeam1 = UITapGestureRecognizer(target: self, action: #selector(decrementScoreTeam1))
    twoFingerTapButtonTeam1.numberOfTouchesRequired = 2
    buttonTeam1.addGestureRecognizer(twoFingerTapButtonTeam1)

    let oneFingerTapButtonTeam2 = UITapGestureRecognizer(target: self, action: #selector(incrementScoreTeam2))
    oneFingerTapButtonTeam2.numberOfTouchesRequired = 1
    buttonTeam2.addGestureRecognizer(oneFingerTapButtonTeam2)

    let twoFingerTapButtonTeam2 = UITapGestureRecognizer(target: self, action: #selector(decrementScoreTeam2))
    twoFingerTapButtonTeam2.numberOfTouchesRequired = 2
    buttonTeam2.addGestureRecognizer(twoFingerTapButtonTeam2)
}

func incrementScoreTeam1() {
    print("1 tapped")
    let ind = setButtonTitleAndIncrement(index: index1, button: buttonTeam1)
    index1 = ind
}

func incrementScoreTeam2() {
    print("2 tapped")
    let ind = setButtonTitleAndIncrement(index: index2, button: buttonTeam2)
    index2 = ind
}

func decrementScoreTeam1() {
    print("1 Two tapped")
    let ind = setButtonTitleAndDecrement(index: index1, button: buttonTeam1)
    index1 = ind
}

func decrementScoreTeam2() {
    print("2 Two tapped")
    let ind = setButtonTitleAndDecrement(index: index2, button: buttonTeam2)
    index2 = ind
}

【问题讨论】：

您为什么坚持使用 UIButton 以及尝试覆盖事物所带来的所有并发症？只需使用您的标签和设计创建自定义 UIView 子类，然后将手势附加到它。不需要所有的绒毛。
@Sneak 我没有坚持任何事情，发布问题是为了找到更好的方法，所以你的建议对我来说很有意义。我刚开始时认为 UIButton 可能是最好的，但现在我正在重新考虑。谢谢！
我明白了，使用 UIView 子类，您将从头开始进行许多简单的自定义，而不是覆盖我建议的东西并找到限制。总帐。
@Sneak 真棒。感谢您提供的信息，这是我还没有想到的那种方式！

标签： ios iphone swift uibutton uitapgesturerecognizer

【解决方案1】：

如何将 UIButton 子类化，然后将索引添加为按钮的属性。大致如下：

import UIKit

@IBDesignable class BaseButton: UIButton {

    var index = 0

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

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

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setup()
    }

    func setup() {
        let oneFingerTapButtonTeam1 = UITapGestureRecognizer(target: self, action: #selector(incrementScoreTeam))
        oneFingerTapButtonTeam1.numberOfTouchesRequired = 1
        addGestureRecognizer(oneFingerTapButtonTeam1)

        let twoFingerTapButtonTeam1 = UITapGestureRecognizer(target: self, action: #selector(decrementScoreTeam))
        twoFingerTapButtonTeam1.numberOfTouchesRequired = 2
        addGestureRecognizer(twoFingerTapButtonTeam1)
    }

    func incrementScoreTeam() {
        let ind = setButtonTitleAndIncrement(index: index, button: self)
        index = ind
    }

    func decrementScoreTeam() {
        let ind = setButtonTitleAndDecrement(index: index, button: self)
        index = ind
    }

    func setButtonTitleAndIncrement(index: Int, button: UIButton) -> Int {
        var index = index
        index += 25
        button.setTitle(String(index), for: .normal)
        return index
    }

    func setButtonTitleAndDecrement(index: Int, button: UIButton) -> Int {
        var index = index
        index -= 25
        button.setTitle(String(index), for: .normal)
        return index
    } 
}

【讨论】：