比SKTileMapNode中的列数和行数高的列和行索引

Question

我想创建一个场景，在该场景中，我可以使用按钮在SKTileMapNode中从一个磁贴移动到另一个磁贴。我在Spritekit场景编辑器的外部.sks文件中创建了一个10x8的SKTileMapNode。为了准确地设置光标的位置，我希望注册该块的特定列和行索引，然后找出它的位置。使用函数numberOfColumns和tileRowIndex可以得到比numberOfRows和tileRowIndex更高的值，这两个值分别是10和8。由于这个问题，我的光标显示在错误的位置。它甚至没有在任何平铺位置上对齐。

class Spielfeld: SKScene {

    var x: Int = 0     // Anzahl Felder in x-Richtung
    var y: Int = 0     // Anzahl Felder in y-Richtung
    var tilemap: SKTileMapNode = SKTileMapNode()
    var up: SKSpriteNode = SKSpriteNode()
    var down: SKSpriteNode = SKSpriteNode()
    var left: SKSpriteNode = SKSpriteNode()
    var right: SKSpriteNode = SKSpriteNode()
    var cursor: SKSpriteNode = SKSpriteNode(imageNamed: "Cursor1Blue")

    override func sceneDidLoad() {
        up = self.childNode(withName: "Up") as! SKSpriteNode
        down = self.childNode(withName: "Down") as! SKSpriteNode
        left = self.childNode(withName: "Left") as! SKSpriteNode
        right = self.childNode(withName: "Right") as! SKSpriteNode

        tilemap = self.childNode(withName: "Tile Map Node") as! SKTileMapNode
        cursor.position = tilemap.centerOfTile(atColumn: 5, row: 5)
        cursor.zPosition = 0.1
        self.addChild(cursor)
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let touch:UITouch = touches.first! as UITouch
        let positionInScene = touch.location(in: self)
        let touchedNode = self.atPoint(positionInScene)
        print(touchedNode.name!)
        if(touchedNode.name == "Tile Map Node") {
            let map = touchedNode as! (SKTileMapNode)
            print(map.tileColumnIndex(fromPosition: positionInScene))   // higher than 10
            print(map.tileRowIndex(fromPosition: positionInScene))      // higher than 8
            print(map.numberOfColumns)  // 10
            print(map.numberOfRows)     // 8
            print(map)
        }
    }
}

Answer 1

当使用tileColumnIndex/tileRowIndex获取索引时，您需要对照磁贴地图中的位置进行检查。在您的示例中，您提供了场景的位置，该位置可能不同，具体取决于平铺贴图的位置。

如果您在地图中使用触摸到的位置，则应该会返回正确的索引。

let positionInMap = touch.location(in: map)
let column = map.tileColumnIndex(fromPosition: positionInMap)
let row = map.tileRowIndex(fromPosition: positionInMap)

来自您的示例的touchesBegan()的更新版本

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch:UITouch = touches.first! as UITouch
    let positionInScene = touch.location(in: self)
    let touchedNode = self.atPoint(positionInScene)
    if(touchedNode.name == "Tile Map Node") {
        let map = touchedNode as! (SKTileMapNode)
        let positionInMap = touch.location(in: map) // Get the touched position in map
        print(map.tileColumnIndex(fromPosition: positionInMap))
        print(map.tileRowIndex(fromPosition: positionInMap))
        print(map.numberOfColumns)
        print(map.numberOfRows)
        print(map)
    }
}

要确保在使用centerOfTile定位平铺时光标与平铺对齐，请将其作为子对象添加到平铺贴图，以确保它们位于相同的坐标系上。否则，您将不得不向光标位置添加必要的偏移量。

tilemap.addChild(cursor)