Well done! We now have our final application that satisfies all the requirements.
In the following screenshot we are showing one of these requirements, which is the detection of an attempt to convert a temperature below the absolute zero temperature in Celsius (-1000.00C):
The UI respects the guidelines provided; the temperatures can be converted by entering them in the corresponding unit field.
To recap, this is the list of requirements that we have implemented:
The application converts temperatures from Celsius to Fahrenheit, and vice versa
The user interface presents two fields to enter the temperatures, one for Celsius and the other for Fahrenheit
When one temperature is entered in one field, the other one is automatically updated with the conversion
If there are errors, they should be displayed to the user, possibly using the same fields
Some space in the user interface should be reserved for the on-screen keyboard, to ease the application operation when several...