sprite kit - Swift - SpriteKit - Update SKAction.waitForDuration while running forever -


i trying update waitforduration action in sequence running forever.

 override func didmovetoview(view: skview) {     //code     runaction(skaction.repeatactionforever(runseq())) }  func runseq() -> skaction{     var difficulty: cgfloat = 0.75      let updateaction = skaction.runblock({         self.runcount++         self.runcount %= 4         println(self.runcount)         if self.runcount == 0 {             difficulty -= 0.1         }          if self.children.count > 51{             println("you loose")         }else{             self.scorelabel.text = string(format: "score: %i", self.score)         }     })      let createantaction = skaction.runblock({self.createant()})      var wait = skaction.waitforduration(nstimeinterval(difficulty))      let seq = skaction.sequence([createantaction, wait, updateaction])      return seq }

difficulty value want, , every 4 loops want decrease amount. currently, starting value remains same, , doesn't change, though changing difficulty value, , recalling sequence of actions every time.

this happening because wait established .75, , nothing changing that. skaction.waitforduration(nstimeinterval(difficulty)) not looking reference difficulty, value, need rethink how want code this.


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