Swift 如何访问枚举'；来自另一个函数的状态

我有一个随机生成迷宫的代码，基本上迷宫是由一个网格（数组）组成的，每个网格单元有4个bool类型的变量（上、下、左、右），它们都指向细胞壁。墙壁的真假是随机选择的。如果一堵墙是真的，那么就有一堵墙被放置，然而如果一堵墙是假的，那么那里就没有墙

然而，所有这些都发生在

迷宫

类和

游戏场景

类中。在

gamesence.swift

中，我创建了一个

enum wallSides

，状态为“上、下、左侧、右侧、诺西德”（基本上指用户点击单元格的哪一面墙）：

我在

func-ConvertLocationPointtoGridPosition

中使用这些状态，它接受

CGPoint

位置，并将其转换为x，y整数返回（以查找它在网格中的单元格）。该函数还使用它接收到的位置，通过

上部、下部、左侧、右侧、noSide

状态和返回

wallSide

，找出位置点位于单元格的哪一面墙：

func ConvertLocationPointToGridPosition(location: CGPoint) -> (x: Int, y: Int, side: wallSides) {
    var xPoint: CGFloat
    var yPoint: CGFloat
    xPoint = location.x / CGFloat(tileSize)
    yPoint = location.y / CGFloat(tileSize)
    let yPointRemainder = yPoint.truncatingRemainder(dividingBy: 1)
    let xPointRemainder = xPoint.truncatingRemainder(dividingBy: 1)
    var wallSide: wallSides

    if yPointRemainder < 0.2 && xPointRemainder < 0.8 && xPointRemainder > 0.2 {
        wallSide = .downSide
    } else if yPointRemainder > 0.8 && xPointRemainder < 0.8 && xPointRemainder > 0.2 {
        wallSide = .upSide
    } else if xPointRemainder < 0.2 && yPointRemainder < 0.8 && yPointRemainder > 0.2 {
        wallSide = .leftSide
    } else if  xPointRemainder > 0.8 && yPointRemainder < 0.8 && yPointRemainder > 0.2 {
        wallSide = .rightSide
    } else {
        wallSide = .noSide
    }//end of if-then

    return(Int(xPoint), Int(yPoint), wallSide)
}

---

请帮助我如何做到这一点。

如果我理解正确，问题是访问多个返回值。试试这个

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    //actually user tapping a wall
    //send a message that the wall has been tapped
    let touch = touches.first!              // Get the first touch
    let location  = touch.location(in: self) //find the location of the touch in the view
    let nodeAtPoint = atPoint(location) //find the node at that location
    if nodeAtPoint.name == "mazeWall" {

        let (x, y, side) = ConvertLocationPointToGridPosition(location: location)
        //self.removeChildren(in: [self.atPoint(location)])

        if  side == wallSides.downSide {
        //code
        }
    }//end of nodeAtPoint = mazeWall if-then statement
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    //actually user tapping a wall
    //send a message that the wall has been tapped
    let touch = touches.first!              // Get the first touch
    let location  = touch.location(in: self) //find the location of the touch in the view
    let nodeAtPoint = atPoint(location) //find the node at that location
    if nodeAtPoint.name == "mazeWall" {
        ConvertLocationPointToGridPosition(location: location)
        //self.removeChildren(in: [self.atPoint(location)])

        //if  side == wallSides.downSide {
            //code
        //}
    }//end of nodeAtPoint = mazeWall if-then statement
}

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    //actually user tapping a wall
    //send a message that the wall has been tapped
    let touch = touches.first!              // Get the first touch
    let location  = touch.location(in: self) //find the location of the touch in the view
    let nodeAtPoint = atPoint(location) //find the node at that location
    if nodeAtPoint.name == "mazeWall" {

        let (x, y, side) = ConvertLocationPointToGridPosition(location: location)
        //self.removeChildren(in: [self.atPoint(location)])

        if  side == wallSides.downSide {
        //code
        }
    }//end of nodeAtPoint = mazeWall if-then statement
}

let position = ConvertLocationPointToGridPosition(location: location)
print("side: \(position.2)")