2.
Navigate to the Connections tab in the Inspector.
3.
Make sure each outlet is connected to the correct text field by hovering the mouse over the connections
as shown in Figure 5-6.
Figure 5-6
Checking the outlet connections
Connecting the Controller with the Model
Create an instance of the converter class inside the
ConverterController
class in Xcode.
1.
In the Classes folder in the Groups and Files sidebar, double-click
ConverterController.h
to open
it in an editor window.
2.
Declare a pointer to a converter object by adding the following line to your code right after the outlets
are declared, before the ending bracket:
Converter *converter;
When clicked, the Convert button sends the
convert:
message to the
ConverterController
object.
Complete the definition of the
convert:
method in the
ConverterController
so that it sends the
convertCurrency
message to the
Converter
instance to execute the conversion:
Connecting the Controller with the Model
49
2007-10-31 | © 2007 Apple Inc. All Rights Reserved.
CHAPTER 5
Bridging the Model and View: The Controller