tileMapNode中tile的physicsbody周围的白色边框

Question

我有一个tileMapNode，我想在其中为一些图块指定物理主体。 我使用以下函数：

static func addPhysicsBody(to tileMap: SKTileMapNode, and tileInfo: String){

    let tileSize = tileMap.tileSize
    let halfWidth = CGFloat(tileMap.numberOfColumns) / 2 * tileSize.width
    let halfHeight = CGFloat(tileMap.numberOfRows) / 2 * tileSize.height

    for column in 0..<tileMap.numberOfColumns{
        for row in 0..<tileMap.numberOfRows{
            let tileDefinition = tileMap.tileDefinition(atColumn: column, row: row)
            let isCorrectTile = tileDefinition?.userData?[tileInfo] as? Bool
            if isCorrectTile ?? false && tileInfo == "wall"{
                let x = CGFloat(column) * tileSize.width - halfWidth
                let y = CGFloat(row) * tileSize.height - halfHeight
                let rect = CGRect(x: 0, y: 0, width: tileSize.width, height: tileSize.height)
                let tileNode = SKShapeNode(rect: rect)
                tileNode.position = CGPoint(x: x, y: y)
                tileNode.physicsBody = SKPhysicsBody.init(rectangleOf: tileSize, center: CGPoint(x: tileSize.width / 2, y: tileSize.height / 2))
                tileNode.physicsBody!.isDynamic = false
                tileNode.physicsBody!.restitution = 0.0
                tileNode.physicsBody!.categoryBitMask = Constants.PhysicsCategories.wall
                tileNode.physicsBody!.collisionBitMask = Constants.PhysicsCategories.player | Constants.PhysicsCategories.npc
                tileMap.addChild(tileNode)
            }
        }
    }
}

这一切都运行良好，但如果我现在运行应用程序，我指定物理主体的图块，有白色边框。 view.showphysics设置为false。 任何人都知道为什么瓷砖周围有白色边框？它看起来像这样：