Apple WebObjects 3.5 Manual de usuario descargar pdf (Pagina 54)

Chapter 2 Enhancing Your Application

You’ll bind the allGuests array to the WORepetition’s list attribute. This tells

WebObjects to generate the elements in the repetition once for each item in the

array. Each time WebObjects iterates through the array, it sets the repetition’s

item attribute to the current array object. You bind item to the variable currentGuest

and use

currentGuest’s ﬁelds to bind the elements inside the repetition (such as

WOStrings). At run time, the table will consist of one row (displaying name,

e-mail address, and comments) for each guest.

1. In WebObjects Builder, make the Main component window active.

2. Select the table at the bottom of the page by clicking outside it and dragging

across it.

3. Choose Edit

m Copy.

4. Make the GuestList component active.

5. Place the cursor at the bottom of the page and choose Edit

m Paste.

You have just copied the table from Main into GuestList. It has all the

same properties, including the bindings. The WOStrings in the table are

still bound to instance variables of

currentGuest. Since currentGuest is a

component variable deﬁned in Main, it isn’t accessible from GuestList.

Therefore, you need to declare it here.

6. From the pull-down menu at the bottom of the window, choose Add

Variable/Method. Enter

currentGuest as the name of the variable and

Guest as its type.

7. Choose from the Elements pop-up list to display the Tables buttons.

8. Click somewhere in the table, then click in the toolbar to enter

structure-editing mode. (Alternatively, Control-click on the table.)

9. Click one of the triangles in the second row to select the entire row.

10. Choose to display Other WebObjects in the toolbar and click

When you wrap a repetition around a table row in this way, the

WORepetition symbol

doesn’t appear in the table. Instead, a blue

border appears around the row. For additional examples of using

repetitions, see Chapter 3, “Creating a WebObjects Database Application”

(page 59).

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Apple WebObjects 3.5 Manual de usuario Pagina 54