Add text on node.

gistfile1.txt

 
        
        
 createTextNode(title: planetsName[index], size: 0.5, planetNode: childNode)


 func createTextNode(title: String, size: CGFloat, x: Float, y: Float , planetNode:SCNNode){
        let text = SCNText(string: title, extrusionDepth: 0)
        text.firstMaterial?.diffuse.contents = UIColor.white
        text.font = UIFont(name: "Avenir Next", size: size)
        let textNode = SCNNode(geometry: text)
        textNode.scale = SCNVector3(0.3,0.3,0.3)
        textNode.position = SCNVector3(x:-0.4  ,y: 0.2, z:0 )
        planetNode.addChildNode(textNode)
    }
    
    //Demo example
    https://github.com/shrawan2015/Solar-System/blob/master/Solar-System%20Final/ViewController.swift