https://www.hackingwithswift.com/100/swiftui/19
From Hacking with Swift:
You need to build an app that handles unit conversions: users will select an input unit and an output unit, then enter a value, and see the output of the conversion.
Which units you choose are down to you, but you could choose one of these:
- Temperature conversion: users choose Celsius, Fahrenheit, or Kelvin.
- Length conversion: users choose meters, kilometers, feet, yards, or miles.
- Time conversion: users choose seconds, minutes, hours, or days.
- Volume conversion: users choose milliliters, liters, cups, pints, or gallons.
If you were going for length conversion you might have:
- A segmented control for meters, kilometers, feet, yard, or miles, for the input unit.
- A second segmented control for meters, kilometers, feet, yard, or miles, for the output unit.
- A text field where users enter a number.
- A text view showing the result of the conversion.
So, if you chose meters for source unit and feet for output unit, then entered 10, you’d see 32.81 as the output.
If you want a bigger challenge, try adding a third segmented control that lets us change the unit being converted – give your program the ability to convert temperature, length, time, or volume, all in one app.
