物理主体未与 spritekit Swift 的网格图案上的纹理图像对齐

我正在做一个游戏，我已经设置了一个网格模式.现在你可以在屏幕截图中看到，小方块是发生碰撞的物理体，由于某种原因，这些方块与图像不对齐.

相关代码如下:

    override func didMove(to view: SKView) {
        ....
        let rockTexture = SKTexture(imageNamed: "pathrocks")
        let gapTexture = SKTexture(imageNamed: "claybricks")
        
        let tileSet = SKTileSet(tileGroups: [])
        let tileSize = CGSize(width: 32, height: 32)
        
        let rockTileGroup = SKTileGroup(rules: [])
        let rockTextureRule = SKTileGroupRule(adjacency: .adjacencyAll, tileDefinitions: [SKTileDefinition(texture: rockTexture)])
        rockTileGroup.rules.append(rockTextureRule)
        tileSet.tileGroups.append(rockTileGroup)
        
        let gapTileGroup = SKTileGroup(rules: [])
        let gapTextureRule = SKTileGroupRule(adjacency: .adjacencyAll, tileDefinitions: [SKTileDefinition(texture: gapTexture)])
        gapTileGroup.rules.append(gapTextureRule)
        tileSet.tileGroups.append(gapTileGroup)
        
        let columns = 20
        let rows = 10 // Increase the number of rows
        let tileMapNode = CustomTileMapNode(tileSet: tileSet, columns: columns, rows: rows, tileSize: tileSize)

        for x in 0..<columns {
            for y in 0..<rows {
                // Determine if it's a gap tile or a rock tile
                let isGapTile = (x == 4 || x == 5 || x == 6)
                let tileGroup = isGapTile ? gapTileGroup : rockTileGroup

                // Set the appropriate tile group for the tile
                tileMapNode.setTileGroup(tileGroup, forColumn: x, row: y)

                // Store the coordinates of gap tiles in the custom tile map node
                if isGapTile {
                    tileMapNode.gapTileCoords.append(TileCoord(column: x, row: y))
                }

                if !isGapTile {
                    let tileRect = CGRect(x: CGFloat(x) * tileSize.width,
                                          y: CGFloat(y) * tileSize.height,
                                          width: tileSize.width,
                                          height: tileSize.height)
                    
                    let tilePhysicsBody = SKPhysicsBody(edgeLoopFrom: tileRect)
                    tilePhysicsBody.categoryBitMask = 4 // You can set it to any appropriate bitmask value
                    tilePhysicsBody.contactTestBitMask = 1 // The car's categoryBitMask
                    let physicsBodyNode = SKNode()
                    physicsBodyNode.physicsBody = tilePhysicsBody
                    tileMapNode.addChild(physicsBodyNode)
                }
            }
        }

        tileMapNode.position = CGPoint(x: 0, y: 0)
        addChild(tileMapNode)