Centre a SKLabelNode on a SKSpriteNode

问题:

I have an SKLabelNode that is the child of a SKSpriteNode because I'm trying to create a Button class to create buttons in an easier way. I've tried a couple of things using the anchor point of the SKSpriteNode, but I don't quite understand exactly what is going on. How do I centre the label onto the sprite (it's parent node)?

回答1:

I realized how to solve this...here's what i did. Keep in mind that I have a class called Button that is a subclass of SKSpriteNode.

In the Button.m class I have an instance variable called label that is a SKLabelNode. I add the label node as a child to the button then set the horizontal and vertical alignment modes to centre.

label = [[SKLabelNode alloc] init];
[self addChild:label];
[label setHorizontalAlignmentMode:SKLabelHorizontalAlignmentModeCenter];
[label setVerticalAlignmentMode:SKLabelVerticalAlignmentModeCenter];

回答2:

This will put your label in center of scene in sprite kit:

yourLabel.horizontalAlignmentMode = .Center;
yourLabel.verticalAlignmentMode = .Center

回答3:

Swift 4.2 XCode 10.1

Copy this function into your SceneKit Class

func createLabel(text: String) {
        let label = SKLabelNode(fontNamed: "Wicked Mouse")

        label.text = text
        label.fontColor = .white
        label.position = CGPoint(x: self.size.width / 2, y: self.size.height / 2)
        label.verticalAlignmentMode = .center
        label.horizontalAlignmentMode = .center
        label.fontSize = 30.0
        label.zPosition = 1
        self.addChild(label)
    }