xcode - Invoking a custom Timer Class -
i've cobbled timer class use nstimer viewcontrollers, code below
import foundation class timer { var timer = nstimer() var handler: (int) -> () let duration: int var elapsedtime: int = 0 init(duration: int, handler: (int) -> ()) { self.duration = duration self.handler = handler } func start() { self.timer = nstimer.scheduledtimerwithtimeinterval(30, target: self, selector: selector("chkprogress"), userinfo: nil, repeats: true) } func stop() { timer.invalidate() } @objc func chkprogress() { self.elapsedtime++ self.handler(elapsedtime) if self.elapsedtime == self.duration { self.stop() } } deinit { self.timer.invalidate() } } then in each viewcontroller can check time progress , display message accordingly. problem when try invoke it
i've tried
var timer = timer() var timer = timer(30) var timer = timer(30,30) the resulting message same telling me cannot invoke timer type (int,int) how duration() in init set out
what doing wrong?
the parameters not take int, int. take int, , closure.
you need fix timer code well;
class timer { var timer = nstimer() var handler: (x:int) -> () let duration: int var elapsedtime: int = 0 init(duration: int, handler: (int) -> ()) { self.duration = duration self.handler = handler } func start() { self.timer = nstimer.scheduledtimerwithtimeinterval(30, target: self, selector: selector("chkprogress"), userinfo: nil, repeats: true) } func stop() { timer.invalidate() } @objc func chkprogress() { self.elapsedtime++ self.handler(x: elapsedtime) if self.elapsedtime == self.duration { self.stop() } } deinit { self.timer.invalidate() } } //implementation of timer
var t = timer(duration: 30, handler:{ (x:int) -> void in //do soemthing x; });
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