ios - Terminating app due to uncaught exception due to uncaught exception (Attemped to add a SKNode which already has a parent) error -

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i'm trying make label shown when game launches, crashes starts. error "terminating app due uncaught exception 'nsinvalidargumentexception', reason: 'attemped add sknode has parent: name:'(null)' text:'tap anywhere start!' fontname:'copperplate' position:{187.5, 333.5}'".this code:

let startgametextnode = sklabelnode(fontnamed: "copperplate")  required init?(coder adecoder: nscoder) {      super.init(coder: adecoder) }  override init(size: cgsize) {      super.init(size: size)   startgametextnode.text = "tap anywhere start!"         startgametextnode.horizontalalignmentmode = sklabelhorizontalalignmentmode.center         startgametextnode.verticalalignmentmode = sklabelverticalalignmentmode.center         startgametextnode.fontsize = 20         startgametextnode.fontcolor = skcolor.whitecolor()         startgametextnode.position = cgpoint(x: scene!.size.width / 2, y: scene!.size.height / 2)         addchild(startgametextnode)

i have background texture moves game launches, , i'm not sure if causing problem.

nevermind. got working. adding late on scene. moved before adds ground scene , app started working.


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