Errata

The "Prototype2" folder code does not open and run when the folder is opened because Prototype.xcodeproj AND Prototype2.xcodeproj are in the SAME folder.

When I opened the app by doubleclicking on Prototype2.xcodeproj it worked. It also worked when I removed Prototype.xcodeproj from the same folder.

The Reachability file reports a warning message:

declaration of 'struct sockaddr_in*' will not be visible outside of this function

Add #import <netinet/in.h> in Reachability.h to get rid of this warning.

On page 55 the code example is given like this:

UILabel * label;

but in the following text, the 'label' object is called 'anObject' and the class is given as 'SomeClass'.

Pages 89 and 162 (printed page number in the PDF) both refer to RootController.m, but there are no other references to that file. I assume this is a reference to GCViewController.m that got missed in a global search/replace.

References are made to "CGAppDelegate.m" which does not exist in these apps.

It's a "Minor" mistake if you can figure out what file it actually means.

A reference to "GAppDelegate.m" is made on page 270; this being a typo.

(How does one provide a page number for an ePub with variable page numbering based on font?)

Mocking Up Functionality with Alert Windows (Paragraph)

Should not "Go back to RootController.m..." be "Go back to CGViewController.m"?

There code text difference shown initially on PDF page 103 (87) versus 120 (104).

Difficult to know what works, what to keep, and what to change.

In the block of code added to the TEAppDelegate.m for the didFinishLaunchingWithOptions there is a error in the code marked with the 1. The line appears as:

self.tabBarController.viewControllers =
self.tabBarController.viewControllers =
@[viewController1, viewController2, viewController3];

The second "self.tabBarController.viewControllers =" is redundant.

In the implementation of the didFinishPickingMediaWithInfo the first line of the implementation is:

[[self dismissViewControllerAnimated:YES completion:nil];

There is an extra [ at the beginning of that line that should not be there.

Is there a reason that newCity.cityPicture is set to nil and then to cityPicture?

newCity.cityPicture = nil;
newCity.cityPicture = cityPicture;

In reference to the previous mention of how the Reachability example has been updated for ARC this means that the code line:

Reachability *reach = [[Reachability reachabilityWithHostName: @"www.apple.com"] retain];

throws a compilation error that "ARC forbids explicit message send of 'retain'".

The second line in the code block:

NSURL *url = [[NSURL URLWithString:string] retain];

throws a compiler error that "ARC forbids explicit message send of 'retain'".

The format string in the NSLog statement for the centigrade, fahrenheit, humidity and wind speed are all:

@"condition = %@"

instead of the correct variable.

The example using the TwitterTrends class no longer works because Twitter has deprecated the 1.0 API. This means you will get a 410 error code back when running the example. The example needs to be updated to the 1.1 version of the Twitter API.