iOS Programming: The Big Nerd Ranch Guide, 6th Edition

4 Text Input and Delegation

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 UITextField

The first label in the WorldTrotter app now is shown to be editable, indicated by an editing cursor. The canvas now has an iOS phone pad at the bottom.

Text Editing

The first thing you are going to do is add a UITextField to the interface and ...