iOS view similar to Chronometer on Android

Question

On Android there exists a standard view called Chronometer details here. Does iOS have a similar view or a library that does something similar?

Answer 1

I not found anyway todo this, so i create a gist here with GPL license, if someone get excited to make it a lib :)

Answer 2

I would use an Timer for this.

var timer = Timer()
timer = Timer(timeInterval: 0.01, target: self, selector: #selector(update), userInfo: nil, repeats: false)

@IBAction func start(sender: UIButton) {
     timer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(ViewController.update(_:)), userInfo: nil, repeats: true)
     RunLoop.current.add(timer, forMode: RunLoop.Mode.common)
    startTime = Date() // new instance variable that you would need to add.
}

func update() {
    let elapsedTime = Date().timeIntervalSince(startTime)
    let currTime = totalTime - elapsedTime
    //total time is an instance variable that is the total amount of time in seconds that you want
    countDown.text = String(currTime)
    if currTime < 0 {
        timer.invalidate()
        //do other stuff that you need to do when time runs out.
    }
}

If you want a smaller or larger pieces of time, just change it the Interval parameter. Also you still would have to address creating some logic to split minutes / seconds ect. using Date methods and incrementing some instance variable.

Answer 3

Why not use a UIDatePicker in timer mode?

UIDatePicker* datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 320, 206)];
datePicker.datePickerMode = UIDatePickerModeCountDownTimer;
datePicker.countDownDuration = 60*5;
[self.view addSubview:datePicker];