ios - Update Once each in specific time -

override func update(_ currenttime: timeinterval) {     // called before each frame rendered     parallax.update(currenttime) } 

how can control update done once on specific period of time

your code doesn't add question, don't know if looking for, here code call function every x time (swift 3):

// call mymethod every 1 second : timer.scheduledtimer(timeinterval: 1, target: self, selector: #selector(mycontroller.mymethod), userinfo: nil, repeats: true) 

please search before post question -> answer