We try to keep our books accurate, but sometimes mistakes creep in. This page lists the errors submitted by our astute readers. If you've found a new error, please submit it.

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Key: Typo Tech. Error Suggestion Not a problem Next edition

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PDF Paper Description Found in Fixed in
19
#49940: Second paragraph, it says that the class name that contains the "SLServiceTwitter" constant is "SLServiceRequest", but the class name shown in...more...
B7.0
11-Oct-12
25

#50303: In the 4'th item for thought, second sentence, there is a space missing between "perhaps" and "handleFacebookButtonTapped:".--Kim Shrier

P1.0
06-Dec-12
28
#50333: "By default, protocol methods are optional, but they can be made mandatory" should state the opposite: "By default, protocol methods are ma...more...
P1.0
08-Dec-12
31

#50134: if the object isnil, nothing

-> is_space_nil_--Christoph Gommel

B8.0
04-Nov-12
32
#49956: The square braces indicate that we're sending an Obj-C message, with the SLComposeViewController class as the target that receives the message...more...
B7.0
18-Oct-12
35 35
#50173: The text says there's a string "yourtwittername" in the shown URL, but there's no such string, the example URL is "twitter.com/pragprog", not ...more...
P1.0
16-Nov-12
46

#50306: In the third paragraph, second sentence, there should be a space between "x-y" and "origin".--Kim Shrier

P1.0
07-Dec-12
60
#50181: In the code block, dismissing the tweet view controller (Line #11) is dependent on the user clicking 'Send'. When clicking 'Cancel', the view...more...
P1.0
19-Nov-12
64
#50307: At the end of the second paragraph, you mention that the full class extension for PRPViewController contains the twitterWebView property when ...more...
P1.0
07-Dec-12
64 49
#50373: "To get the NSString to behave as a normal, immutable string, we copy it into a plain NSString at assign-time." -- should be "To get the N...more...
P1.0
13-Dec-12
66
#50183: The implementation of handleTwitterData:urlResponse:error: doesn't clear the contents of twitterTextView before generating it anew. If the "S...more...
P1.0
19-Nov-12
73
#49958: Noticed on the Readmill version of the book, in the code listing for Programming/PRPFirstProjectTweeter02/PRPFirstProjectTweeter/PRPViewContro...more...
B8.0
18-Oct-12
80
#49933: The second sentence of the first paragraph in section "3.3 Concurrency and UIKit" ends with "call them" (referring to UIKit properties). Would...more...
B7.0
07-Oct-12
82

#49932: The penultimate word in the last sentence of the first paragraph should be twitterTextView not twitterWebView.--Bruce Hobbs

B7.0
07-Oct-12
84
#50260: Potential gotcha: the order matters here. If you aren't paying attention and put line 9 in the wrong place (like I did), say, at line 5 ahea...more...
P1.0
04-Dec-12
87
#50065: In 4.1 Practicing MVC. I think you need to add: #import "PRPRecipe.h" at the top of PRPViewController.h so the property can resolve the ref...more...
B8.0
27-Oct-12
88

#50217: Minor typo: page 88 in ePub first line the URL in the code is "pragprog" twitter handle but text refers "yourtwittername".
--Dad

P1.0
29-Nov-12
89
#50310: Below figure 36, probably after you talk about sizing the image view for the cookies, you might want to talk about updating the view constrain...more...
P1.0
07-Dec-12
97

#49957: There is a reference to an image on page 98, but there is no image on page 98, just the image subscript. --Alex crouzen

B8.0
18-Oct-12
98
#50740: I have no idea what is meant by "Import the PRPRecipe.h filename and..." in the middle of the page. Assuming we continue from chapter 4, I alr...more...
P1.0
06-Feb-13
98
#50312: In the second paragraph, first sentence the hyphenation for PRPAppDelegate.m looks odd. I would think the hyphen should be between PRP and Ap...more...
P1.0
07-Dec-12
106

#50284: Text refers to IMG_1948.jpg and code refers to cookie.jpg. Also, it may be helpful to show how to import the image into the project.--Foster Bass

P1.0
05-Dec-12
139

#50175: On line 5 in the first text block there is a space missing at the end of the line between title and property--Magnus Rembold

P1.0
17-Nov-12
141
#50177: In the second last block of text on this page, you mention, that the view will be in a navigation controller. So I would expect to find the pa...more...
P1.0
17-Nov-12
142

#50176: In line 4 in the first text block I think it should read: "that THE textViewDidEndEditing: method is called before the recipe editor IS displayed."--Magnus Rembold

P1.0
17-Nov-12
151
#50224: When the property recipeListVC is added to the headerfile PRPRecipeEditorViewController.h the next sentence says: In the implementation fil...more...
P1.0
02-Dec-12
156

#50326: In the last paragraph, first sentence, there should be a space between "super" and "init".--Kim Shrier

P1.0
07-Dec-12
158
#50203: When adding the 'recipes' property to the new PRPRecipeDocument class, the book fails to note that the property getter should be copied from P...more...
P1.0
24-Nov-12
159

#49986: Figure 62 appears to be missing--David Yellin

B8.0
23-Oct-12
160
#50204: In the second paragraph it says: "We need to ensure that we have an array ready in which to store recipes when the document is created, so let...more...
P1.0
24-Nov-12
162
#50205: In the section "Refine the Document" it says: "If you delete the app from the simulator and then rerun it from Xcode, you'll notice that our d...more...
P1.0
24-Nov-12
163
#49908: Xcode 4.5: Starting with the "DocumentRecipies_start" code and then working through page 170, up to Refine the Document: If you run the code f...more...
B7.0
02-Oct-12
172 160
#50259: PRPRecipesDocument.m is missing "recipes" property initialization for those following along writing their own code. The book says on page 160,...more...
P1.0
04-Dec-12
178
#49925: In the middle of the page: "Tap the Add button on the bottom right..." should be "Tap the Add button on the bottom left..." It is located ther...more...
B7.0
05-Oct-12
225
#50616: My test script kept failing at the step where it was supposed to click the prep time stepper. With the keyboard on the screen, it couldn't fin...more...
P1.0
29-Jan-13
2002 gfsoD

#50115: I will be putting this dazzling isnihgt to good use in no time.--rjzclwHAafvqEucmrz

B8.0
01-Nov-12