swift3 - How to increase gravity using an if statement -


i have set gravity @ start of game objects fall quite slow , player collects these items want gravity increase. 

override func didmove(to view: skview) {     self.physicsworld.gravity = cgvector(dx: 0.0, dy: -3.0)     initializegame() }

i have set gravity unsure on how edit if statement. e.g. if score = 20 gravity increases. great on how this

you might want through spritekit tutorial. generally, updating properties happens in update(_ currenttime: timeinterval) method. can implement method in skscene subclass: 

override func update(_ currenttime: timeinterval) {     if (score == 20) { // whatever condition want         // whatever want     } }

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