Errata for iPad Programming

#45208: Date: Sat Oct 2 21:46:34 2010 -0500

p20 The C in MVC, connect the outlet

Took a bit to figure this out.
"Jump over to IB and connect the outlet to the Assignments object in
the RootViewController.xib." p 20.

First interpretation:
---------------------
Made a connection from the Assignments class to the File's Owner and
then separated the connection. Used the New Referencing Outlet to
make the connection.

Later Interpretation:
---------------------
This means that the File's Owner has an 'assignments' outlet that
needs to be connected to the 'Assignments' class. Open up the
connections for the File's Owner and see the assignments variable.
--George Wood

#44761: In the discussion for adding the DeleteGestureRecognizer to the viewDidLoad method of Bubles5ViewController.m, you might want to remind the reader to include the header file DeleteGestureRecognizer.h.--Kim Shrier

#44760: This is just a question of consistency. In the code for updating viewToDelete, in the condition part of the if statement, you refer to the instance variable directly but in the body of the if statement, you use the property accessor. Since you are leaning in the direction of always using the property accessors, I would think you would want to correct the condition to test self.viewToDelete. so the code would be:

if (self.viewToDelete == nil) {--Kim Shrier

#44775: I am not sure how consistent you want to be or if you are just showing different ways to get something done. On page 18 you talk about disappearing ivars. Are you meaning to adopt this for all the code?--Kim Shrier

#44776: Another question about consistency. In the paragraph after the @synthesize viewForMovie; statement, you describe in great detail how to connect up the new outlet. If the readers have been following along with the code, they have already done this operation many times and the text in the book just says to hook up the outlet. If you assume a level of competency earlier in the book, I find it odd that you spell it out in detail now.--Kim Shrier

#44777: The declaration for the getInfo: method is different in the .h file and the .m file. Even though (void) and (IBAction) are the same, I tend to use (IBAction) in both the .h and .m files for consistency.--Kim Shrier

#44784: In the PlaylistController.h file listing in the book, you might want to include the declaration for the initializer -(id)initWithPlayer:(MoviePlayerViewController *)thePlayer;
--Kim Shrier

#44791: Before showing the code for viewDidLoad in MoviePlayerViewController, you should probably mention that the reader should add shoutOutTexts and shoutOutTimes instance variables.--Kim Shrier

#44805: Before the code listing for the playbackSliderMoved: method, you should tell the reader to create the BOOL slider instance variable and explain why it's there.--Kim Shrier

#44822: Since you added the line:

externalScreen = (UIScreen *)[notification object];

to the screenDidConnectNotification: method, shouldn't you also add the line:

externalScreen = nil;

to the screenDidDisconnectNotification: method? It would seem that this would help the code you are adding later to have a more accurate picture of the state of the external display.--Kim Shrier

#44828: Looking at the ExternalDisplay3/Classes/ExternalDisplayViewController.h file and the ExternalDisplayViewController.xib, I notice that you have an outlet for the switch screen button that you don't connect up. In the interest of uncluttering the code, I would remove it.--Kim Shrier

#44829: In both the code listings for the switchMovie method, you always use player as an instance variable but in the viewDidLoad method you referenced it as a property. It would seem that in the name of consistency you would reference it the same way in all places.--Kim Shrier