Localizing SKLabelNodes in .sks files
Most of my first scenes I implemented by code instead of the GUI tool, but eventually I thought it could be quite helpful for certain scenes.
I quickly noticed the issue that it was not so straightforward to localize the SKLabelNode texts anymore.
I tried the default method by clicking ‘Localize…’ button in the tool, but that actually made duplicates of the .sks file that I was supposed to change for localizing the texts. This seemed to have the bad side that if I were to make changes to the layout or add new elements, I would have to do it multiple times.
Instead I implemented this bit of code where I unarchive the .sks files. This is what the default unarchive function more or less looks like:
extension SKNode { class func unarchiveFromFile(file : NSString) -> SKNode? { let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") var sceneData = NSData.dataWithContentsOfFile(path!, options: .DataReadingMappedIfSafe, error: nil) var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData) archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene") let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as SKScene archiver.finishDecoding() scene.scaleMode = .AspectFill localizeLabelNodes(scene) return scene } }
For this article the interesting bit is the call to localizeLabelNodes. There I do this:
func localizeLabelNodes(scene : SKScene) { for node in scene.children { if var labelNodeText = (node as? SKLabelNode)?.text { var index = advance(labelNodeText.startIndex, 4) if labelNodeText.substringToIndex(index) == "L:::" { var langId = labelNodeText.substringFromIndex(index) (node as? SKLabelNode)?.text = NSLocalizedString(langId, comment: langId) } } } }
So basically I enumerate the SKLabelNodes of the scene, and if the text matches the pattern “L:::”, I know that this is something to localize. Then I simply the substring as the translation ID.
Example: In .sks file, SKLabelNode.text : “L:::New Game” In localizable.strings (English): “New Game” = “New Game”; In localizable.strings (Finnish): “New Game” = “Uusi Peli”;
This way when I want to change translations of .sks SKLabelNodes, I can segregate changes to the strings file like elsewhere.
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