Get 12h hours am/pm Time - swift

Question

I want to display the time from a Slider to a Label. So i must convert the value and get the current day time on it like 00:00 am/pm.
So i need there a stepper how print all 5 steps like (5,10,15,20,25....50,55)
So this code on the bottom don´t run good, have anybody a better way to make that ?
I have try it but it becomes an error when i slider back (zb: when it´s 8:00 am and i slider back to 7:55 am it come for first 7:00 am.
Here is the code:
func valueChange(_ sender: CircleSlider) {
let countmin = Int(Double(sender.value) * 14.4)
var hour = countmin / 60
let mins = countmin - (hour*60)
if hour >= 12 {
hour -= 12
Am.text = "Pm"
} else {
Am.text = "Am"
}
hours = hour
let i = String(mins)
switch i {
case "Nil":
minutes = 00
case "0":
minutes = 00
case "5":
minutes = 05
case "10":
minutes = 10
case "15":
minutes = 15
case "25":
minutes = 25
case "30":
minutes = 30
case "35":
minutes = 35
case "40":
minutes = 40
case "45":
minutes = 45
case "50":
minutes = 50
case "55":
minutes = 55
case "60":
minutes = 60
default:
break
}
self.circleTime.text = "\(String(format: "%02d", hours!)):\(String(format: "%02d", minutes!))"
}
Thank´s for Help :)

Answer 1

I think there's an issue in your method for 7:56, 7:57, 7:58, 7:59 (it is not truncating well). This code should work for you:
func valueChange(_ sender: CircleSlider) {
let countmin = Int(Double(sender.value) * 14.4)
var hour = countmin / 60
let mins = countmin - (hour * 60)
if hour >= 12 {
hour -= 12
Am = "Pm"
} else {
Am = "Am"
}
hours = hour
minutes = roundToFives(Double(mins))
// This fixes when you have hh:60. For instance, it fixes 7:60 to 8:00
if minutes == 60 {
hours = hour + 1
minutes = 0
}
self.circleTime.text = "\(String(format: "%02d", hours!)):\(String(format: "%02d", minutes!))"
}
// idea of this method comes from: http://stackoverflow.com/questions/27922406/round-double-to-closest-10-swift
private func roundToFives(x : Double) -> Int {
return 5 * Int(round(x / 5.0))
}