WorldTrotter looks good, but so far it does not do anything. In this chapter, you are going to add an instance of UITextField to WorldTrotter. The text field will allow the user to type in a temperature in Fahrenheit that will then be converted to Celsius and displayed on the interface (Figure 4.1).
Figure 4.1 WorldTrotter with a
The first thing you are going to do is add a UITextField to the interface and ...