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Time Turner
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import SwiftUI | |
struct ContentView: View { | |
enum timeUnits: String, CaseIterable, Identifiable { | |
var id: String { self.rawValue } | |
case seconds = "seconds" | |
case minutes = "minutes" | |
case hours = "hours" | |
case days = "days" | |
} | |
@State private var input = "" | |
@State private var inputUnit: timeUnits = .seconds | |
@State private var outputUnit: timeUnits = .seconds | |
var inputInSeconds: Double { | |
let totalSeconds = Double(input) ?? 0 | |
switch inputUnit { | |
case .seconds: return totalSeconds | |
case .minutes: return totalSeconds * 60 | |
case .hours: return totalSeconds * 3600 | |
case .days: return totalSeconds * 86_400 | |
} | |
} | |
var convertedTime: Double { | |
switch outputUnit { | |
case .seconds: return self.inputInSeconds | |
case .minutes: return self.inputInSeconds / 60 | |
case .hours: return self.inputInSeconds / 3600 | |
case .days: return self.inputInSeconds / 86_400 | |
} | |
} | |
var body: some View { | |
NavigationView { | |
Form { | |
Section(header: Text("Time to convert")) { | |
TextField("Enter an amount to convert…", text: $input) | |
.keyboardType(.decimalPad) | |
Picker("Input Unit", selection: $inputUnit) { | |
ForEach(timeUnits.allCases) { | |
Text($0.rawValue).tag($0) | |
} | |
} | |
.pickerStyle(SegmentedPickerStyle()) | |
} | |
Section(header: Text("Converted Time")) { | |
Text("\(convertedTime, specifier: convertedTime.truncatingRemainder(dividingBy: 1) == 0 ? "%.f" : "%.5f")") | |
Picker("Output Unit", selection: $outputUnit) { | |
ForEach(timeUnits.allCases) { | |
Text($0.rawValue).tag($0) | |
} | |
} | |
.pickerStyle(SegmentedPickerStyle()) | |
} | |
} | |
.navigationBarTitle("Time Turner") | |
} | |
} | |
} | |
struct ContentView_Previews: PreviewProvider { | |
static var previews: some View { | |
ContentView() | |
.previewDevice("iPhone 11 Pro") | |
} | |
} |
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Another iteration on this, just for fun: https://gist.github.com/k-mao/e7a863937b9d06cfec4ed0ba156be743