SwiftUI-How to formate seconds into Minutes:Seconds? - swift

Question

I am trying to make a timer in SwiftUI and everything works well so far but I can't figure out how to format the seconds into seconds and minutes. So for example if the countdown was 299 seconds, I want it to show 4(mins):59(secs) instead of just 300 seconds.
I saw a video on youtube making a timer too and they managed to format it via making minutes and seconds constants then format it via a function but it didn't really work for me.
import SwiftUI
struct TimerView: View {
var timerEnd = 0
#State var countdownTimer = 300
#State var timerRunning = false
#State var isPaused = false
#State var isActive = false
#State var showingAlert = false
let timer = Timer.publish(every: 1, tolerance: 0.5, on: .main, in: .common).autoconnect()
func format(result: Int) -> String {
let value = String(format:"%d:%02\(300/60)", countdownTimer)
return value
}
func reset() {
countdownTimer = 300
timerRunning = true
}
var body: some View {
VStack {
Text("Time: \(format(result: countdownTimer))")
.padding()
.onReceive(timer) { _ in
if countdownTimer > 0 && timerRunning {
countdownTimer -= 1
} else {
timerRunning = false
}
}
.font(.system(size: 30))
HStack(spacing:30) {
Button(timerRunning ? "Reset" : "Start") {
reset()
}
.padding()
.background((Color(red: 184/255, green: 243/255, blue: 255/255)))
.foregroundColor(.black)
.cornerRadius(10)
.font(Font.system(size: UIFontMetrics.default.scaledValue(for: 16)))
Button(timerRunning ? "Pause" : "Resume") {
if timerRunning == true {
timerRunning = false
} else {
timerRunning = true
}
}
.padding()
.foregroundColor(.black)
.background(.red)
.cornerRadius(10)
.font(Font.system(size: UIFontMetrics.default.scaledValue(for: 16)))
}
}
}
}
struct TimerView_Previews: PreviewProvider {
static var previews: some View {
TimerView()
}
}

Answer 1

You can do with an extension class like this. After that code you will see a method in your int value.
You can use countdownTimer.convertDurationToString()
extension Int {
public func hmsFrom() -> (Int, Int, Int) {
return (self / 3600, (self % 3600) / 60, (self % 3600) % 60)
}
public func convertDurationToString() -> String {
var duration = ""
let (hour, minute, second) = self.hmsFrom()
if (hour > 0) {
duration = self.getHour(hour: hour)
}
return "\(duration)\(self.getMinute(minute: minute))\(self.getSecond(second: second))"
}
private func getHour(hour: Int) -> String {
var duration = "\(hour):"
if (hour < 10) {
duration = "0\(hour):"
}
return duration
}
private func getMinute(minute: Int) -> String {
if (minute == 0) {
return "00:"
}
if (minute < 10) {
return "0\(minute):"
}
return "\(minute):"
}
private func getSecond(second: Int) -> String {
if (second == 0){
return "00"
}
if (second < 10) {
return "0\(second)"
}
return "\(second)"
}
}