为 superview 添加目标到 UIButton

Question

我正在以编程方式将 UIView 添加到 SKScene。在这个 UIView 中，我有一个按钮可以触发 SKScene 中的命令。我该怎么做呢？我的代码抛出异常。或者这可能只是不干净的编程？

class LevelAchievedView: UIView {

override init(frame: CGRect) {
        super.init(frame: frame)
        self.opaque = false
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override func drawRect(rect: CGRect) {
        let replayButton = UIButton()
        replayButton.setTitle("Replay?", forState: UIControlState.Normal)
        replayButton.setTitleColor(UIColor.greenColor(), forState: UIControlState.Normal)
        replayButton.titleLabel!.font = UIFont(name: "HelveticaNeue-Light", size: 30)
        replayButton.addTarget(self.superview, action: "returnToStart", forControlEvents: .TouchUpInside)
        replayButton.frame.origin = CGPointMake(10, 10)
        self.addSubview(replayButton)
    }

看来我搞砸了 replayButton.addTarget(self.superview...，我想我不能在这种情况下使用 self.superview，尽管我在 SKScene 中有 func returnToStart()。我错过了什么？

抛出的异常：

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[SKView returnToStart]: unrecognized selector sent to instance 0x7ff10980fc00'

Answer 1

您需要实施 returnToStart。尝试添加如下内容：

function returnToStart() {
    println("returning to start");
}

给你的LevelAchevedViewclass

Answer 2

self.superview 不是 SKScene。只是一个解决方案：

class LevelAchievedView: UIView {
    let replayButton: UIButton

    override init(frame: CGRect) {
        self.replayButton = UIButton()

        super.init(frame: frame)
        self.opaque = false

        replayButton.setTitle("Replay?", forState: UIControlState.Normal)
        replayButton.setTitleColor(UIColor.greenColor(), forState: UIControlState.Normal)
        replayButton.titleLabel!.font = UIFont(name: "HelveticaNeue-Light", size: 30)
        replayButton.frame.origin = CGPointMake(10, 10)
        self.addSubview(replayButton)
    }
}

class MyScene: SKScene {
    override func didMoveToView(view: SKView) {
        // ...
        let levelAchieved = LevelAchievedView(rect: CGRect(...))
        levelAchieved.replayButton.addTarget(self, action: "returnToStart", forControlEvents: .TouchUpInside)
        view.addSubview(levelAchieved)
    }

    func returnToStart() {
        // your code here
    }
}

为 superview 添加目标到 UIButton

Adding target to UIButton for superview

uibutton

uiview

ios

skscene

swift