Programmatically create SKTileMapNode in Swift

Question

does anyone know how to create an SKTileMapNode programmatically using Swift please? (NOTE: I do not want to do this using the editor, I want to achieve this programmatically only)

I have tried the following but does not render my tile map

let bgTexture = SKTexture(imageNamed: "background")
let bgDefinition = SKTileDefinition(texture: bgTexture, size: bgTexture.size())
let bgGroup = SKTileGroup(tileDefinition: bgDefinition)
let tileSet = SKTileSet(tileGroups: [bgGroup])
let bgNode = SKTileMapNode(tileSet: tileSet, columns: 5, rows: 5, tileSize: bgTexture.size())
bgNode.position = CGPoint(x: self.frame.size.width / 2, y: self.frame.size.height / 2)
bgNode.setScale(1)
self.addChild(bgNode)

Any help greatly appreciated

Answer 1

To layout the entire map with the single background tile you would iterate through each column and each row. You'll need to retrieve the background tile first.

let tile = bgNode.tileSet.tileGroups.first(
    where: {$0.name == "background"})

for column in 0..4 {
    for row in 0..4 {
        bgNode.setTileGroup(tile, forColumn: column, row: row)
    }
}

There is also a convenience function to achieve a flood fill;

bgNode.fill(with: tile)

There is also an initialiser for SKTilemapNode that accepts SKTileGroup

let bgNode = SKTileMapNode(tileSet: tileSet, columns: 5, rows: 5, tileSize: bgTexture.size(), fillWithTileGroup: tile)

I strongly recommend to leverage the functionality built into Xcode for creating TileSets and TileMaps. You can still programatically fill the map.

Answer 2

In case it's helpful to anyone, here's the whole thing put together:

class MyGameScene: SKScene {
    override func didMove(to view: SKView) {
        guard let tileSet = SKTileSet(named: "testset") else {
            // hint: don't use the filename for named, use the tileset inside
            fatalError()
        }

        let tileSize = tileSet.defaultTileSize // from image size
        let tileMap = SKTileMapNode(tileSet: tileSet, columns: 5, rows: 5, tileSize: tileSize)
        let tileGroup = tileSet.tileGroups.first
        tileMap.fill(with: tileGroup) // fill or set by column/row
        //tileMap.setTileGroup(tileGroup, forColumn: 5, row: 5)
        self.addChild(tileMap)
    }
}