# šŸ“š Official Books **URL:** https://forums.kodeco.com/c/books/6.md?page=60 [Latest](https://forums.kodeco.com/latest.md) Ā· [Categories](https://forums.kodeco.com/categories.md) Ā· [Tags](https://forums.kodeco.com/tags.md) **Page:** 61 --- ## [Errata for Kotlin Apprentice 2nd Edition](https://forums.kodeco.com/t/errata-for-kotlin-apprentice-2nd-edition/82125)
**Author:** [@mandafrederick](https://forums.kodeco.com/u/mandafrederick)\ **Replies:** 7\ **Last updated:** [November 3, 2020, 1:48pm UTC](https://forums.kodeco.com/t/errata-for-kotlin-apprentice-2nd-edition/82125 "2020-11-03T13:48:13Z")
Creating this topic to catch any typos and bugs in the 2nd Edition of Kotlin Apprentice. --- ## [Server Side Swift with Vapor Book](https://forums.kodeco.com/t/server-side-swift-with-vapor-book/124078)
**Author:** [@sinduke](https://forums.kodeco.com/u/sinduke)\ **Replies:** 1\ **Last updated:** [November 3, 2020, 1:29pm UTC](https://forums.kodeco.com/t/server-side-swift-with-vapor-book/124078 "2020-11-03T13:29:42Z")
When to update. I just bought a book for this book, subscribed member. But after the leaf part of this book is all vapor3 --- ## [Dot about Light source and point](https://forums.kodeco.com/t/dot-about-light-source-and-point/123983)
**Author:** [@richmond\_jam](https://forums.kodeco.com/u/richmond_jam)\ **Replies:** 3\ **Last updated:** [November 3, 2020, 10:52am UTC](https://forums.kodeco.com/t/dot-about-light-source-and-point/123983 "2020-11-03T10:52:55Z")
Hello caroline, This week I review code and I have a new question in chapter 5. In The dot product section, may I think when the light vector and point normal vector are parallel but opposite directions, it would be ā€¦ --- ## [Where is the SwiftUI?](https://forums.kodeco.com/t/where-is-the-swiftui/123944)
**Author:** [@104](https://forums.kodeco.com/u/104)\ **Replies:** 2\ **Last updated:** [November 3, 2020, 12:37am UTC](https://forums.kodeco.com/t/where-is-the-swiftui/123944 "2020-11-03T00:37:38Z")
I bought the book iOS apprentice before and I didnā€™t get the chance to work on it because I have been busy with my school studies until now. Halfway through my studies, I found that some content is out of date. But afterā€¦ --- ## [Chapter 11: Test Suite 'debug.xctest' failed](https://forums.kodeco.com/t/chapter-11-test-suite-debug-xctest-failed/122245)
**Author:** [@outalla](https://forums.kodeco.com/u/outalla)\ **Replies:** 1\ **Last updated:** [November 2, 2020, 9:53am UTC](https://forums.kodeco.com/t/chapter-11-test-suite-debug-xctest-failed/122245 "2020-11-02T09:53:23Z")
When building on Xcode I donā€™t get any error but when I run, docker-compose -f docker-compose-testing.yml up \\ --abort-on-container-exit on my terminal i get the following output/error: til-app\_1 | Test Case ā€˜Useā€¦ --- ## [Terminal Issues](https://forums.kodeco.com/t/terminal-issues/122997)
**Author:** [@preachonberto](https://forums.kodeco.com/u/preachonberto)\ **Replies:** 1\ **Last updated:** [November 2, 2020, 9:50am UTC](https://forums.kodeco.com/t/terminal-issues/122997 "2020-11-02T09:50:47Z")
Iā€™m currently having issues with starting a new Vapor project. When I try to run vapor new HelloVapor in my terminal I get this issue: dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib Referenced ā€¦ --- ## [Swiftui state variable count lost what it stored](https://forums.kodeco.com/t/swiftui-state-variable-count-lost-what-it-stored/123940)
**Author:** [@yangwulong1978](https://forums.kodeco.com/u/yangwulong1978)\ **Replies:** 2\ **Last updated:** [November 2, 2020, 7:10am UTC](https://forums.kodeco.com/t/swiftui-state-variable-count-lost-what-it-stored/123940 "2020-11-02T07:10:51Z")
when I click onTapGesture event to setup self.showDetailView = true self.count = 5 the sheet will popup, but the self.count always be 0, not be 5. so the code Text(ā€œ5555ā€) will never be hit. it seems state variable coā€¦ --- ## [Chapter 11 Tessellation (Final Project)](https://forums.kodeco.com/t/chapter-11-tessellation-final-project/123416)
**Author:** [@jdlc](https://forums.kodeco.com/u/jdlc)\ **Replies:** 4\ **Last updated:** [November 2, 2020, 2:39am UTC](https://forums.kodeco.com/t/chapter-11-tessellation-final-project/123416 "2020-11-02T02:39:14Z")
Curious if anyone with a 2019 16" MBP running Catalina has tried running this on macOS? Never actually runs the exercise successfully, and 90% of the time results in an OSX crash after a few messages: Execution of the ā€¦ --- ## [\[Duplicate\] Chapter 4: Kick drum scale is way too small](https://forums.kodeco.com/t/duplicate-chapter-4-kick-drum-scale-is-way-too-small/123937)
**Author:** [@cisforcojo](https://forums.kodeco.com/u/cisforcojo)\ **Replies:** 1\ **Last updated:** [November 2, 2020, 12:06am UTC](https://forums.kodeco.com/t/duplicate-chapter-4-kick-drum-scale-is-way-too-small/123937 "2020-11-02T00:06:17Z")
I believe Iā€™ve followed the instructions correctly but when I preview the USDZ file in Finder or import the drum into Reality Composer, the scale is way too small. Even the max scale in the slider is insufficient. Any idā€¦ --- ## [\[Solved\] Chapter 1: Reality Composer does not play any audio](https://forums.kodeco.com/t/solved-chapter-1-reality-composer-does-not-play-any-audio/123932)
**Author:** [@cisforcojo](https://forums.kodeco.com/u/cisforcojo)\ **Replies:** 1\ **Last updated:** [November 1, 2020, 9:48pm UTC](https://forums.kodeco.com/t/solved-chapter-1-reality-composer-does-not-play-any-audio/123932 "2020-11-01T21:48:39Z")
Reality Composer v1.5 (141.33) is not playing any audio for TinyToyTank behaviors. Source version is 1.0.ea3 --- ## [Chapter 6.2 Examining the stacks frame](https://forums.kodeco.com/t/chapter-6-2-examining-the-stacks-frame/123840)
**Author:** [@marvmax](https://forums.kodeco.com/u/marvmax)\ **Replies:** 0\ **Last updated:** [October 31, 2020, 3:46am UTC](https://forums.kodeco.com/t/chapter-6-2-examining-the-stacks-frame/123840 "2020-10-31T03:46:00Z")
For some reason I cannot get the symbolic breakpoint to stop. Signals.MasterViewContoller.viewWillAppear(Swift.Bool) ā†’ () I was having the same problem with the breakpoint in Chapter 5, and it suddenly started working.ā€¦ --- ## [MVVM-C with App Dependency Container](https://forums.kodeco.com/t/mvvm-c-with-app-dependency-container/123822)
**Author:** [@abnerabbey](https://forums.kodeco.com/u/abnerabbey)\ **Replies:** 0\ **Last updated:** [October 30, 2020, 5:55pm UTC](https://forums.kodeco.com/t/mvvm-c-with-app-dependency-container/123822 "2020-10-30T17:55:26Z")
I am adopting MVVM-C with App Dependency Container pattern and Iā€™ve faced the following questions: Is it the app dependecy container the responsible to create the app coordinator? As the app container instance is rā€¦ --- ## [Chapter 2: Custom Subscriber](https://forums.kodeco.com/t/chapter-2-custom-subscriber/123792)
**Author:** [@novinfard](https://forums.kodeco.com/u/novinfard)\ **Replies:** 0\ **Last updated:** [October 30, 2020, 10:32am UTC](https://forums.kodeco.com/t/chapter-2-custom-subscriber/123792 "2020-10-30T10:32:31Z")
I donā€™t understand why the output of the following code: example(of: "Custom Subscriber") { let publisher = (1...10).publisher final class IntSubscriber: Subscriber { typealias Input = Int typeaā€¦ --- ## [The margin mismatch of text contents between two UI label due to the size](https://forums.kodeco.com/t/the-margin-mismatch-of-text-contents-between-two-ui-label-due-to-the-size/123703)
**Author:** [@suckcook](https://forums.kodeco.com/u/suckcook)\ **Replies:** 0\ **Last updated:** [October 29, 2020, 9:43am UTC](https://forums.kodeco.com/t/the-margin-mismatch-of-text-contents-between-two-ui-label-due-to-the-size/123703 "2020-10-29T09:43:56Z")
I was doing the last excercise, that iOS Apprentice proposed at the end of the chapter that involves 2nd app ā€œChecklistā€. I was adding deadlines to the checklist items in a checklist view. I didnā€™t use .subtitle style,ā€¦ --- ## [Chapter 9 - Error when creating user after Acronym relationship - Vapor 4](https://forums.kodeco.com/t/chapter-9-error-when-creating-user-after-acronym-relationship-vapor-4/121088)
**Author:** [@krut](https://forums.kodeco.com/u/krut)\ **Replies:** 3\ **Last updated:** [October 28, 2020, 7:43am UTC](https://forums.kodeco.com/t/chapter-9-error-when-creating-user-after-acronym-relationship-vapor-4/121088 "2020-10-28T07:43:16Z")
After adding the relationship between Acronym and User and clearing the database I get the following error when trying to create a user: \[ ERROR \] null value in column ā€œuserIDā€ of relation ā€œusersā€ violates not-null consā€¦ --- ## [MyLocations App Help](https://forums.kodeco.com/t/mylocations-app-help/74626)
**Author:** [@isaacballas2](https://forums.kodeco.com/u/isaacballas2)\ **Replies:** 16\ **Last updated:** [October 27, 2020, 5:54pm UTC](https://forums.kodeco.com/t/mylocations-app-help/74626 "2020-10-27T17:54:33Z")
I am working on the Saving Locations Chapter of the MyLocations app, and get the error unexpectedly found nil , when I added the code setting the tab bar controller as the root in app Delegate, why is this happening and ā€¦ --- ## [Chapter 27 - Location.placemark warning](https://forums.kodeco.com/t/chapter-27-location-placemark-warning/123568)
**Author:** [@steveb\_la](https://forums.kodeco.com/u/steveb_la)\ **Replies:** 0\ **Last updated:** [October 27, 2020, 5:44pm UTC](https://forums.kodeco.com/t/chapter-27-location-placemark-warning/123568 "2020-10-27T17:44:32Z")
Iā€™m getting this warning now that Iā€™m working on Chapter 27. DataModel.xcdatamodel:Location.placemark: warning: Location.placemark is using a nil or insecure value transformer. Please switch to NSSecureUnarchiveFromDataTā€¦ --- ## [Intermediate Fetching. Asynchronous fetching](https://forums.kodeco.com/t/intermediate-fetching-asynchronous-fetching/116242)
**Author:** [@pegs](https://forums.kodeco.com/u/pegs)\ **Replies:** 3\ **Last updated:** [October 27, 2020, 6:41am UTC](https://forums.kodeco.com/t/intermediate-fetching-asynchronous-fetching/116242 "2020-10-27T06:41:23Z")
I am download https://store.raywenderlich.com/products/core-data-by-tutorials-source-code. Open ā€œ04-04-intermediate-fetchingā€ ā†’ final ā†’ BubbleTeaFinder And necessarily add scheme ā€œ-com.apple.CoreData.ConcurrencyDebug 1ā€,ā€¦ --- ## [Adding an empty directory to the staging area](https://forums.kodeco.com/t/adding-an-empty-directory-to-the-staging-area/123500)
**Author:** [@vicentube](https://forums.kodeco.com/u/vicentube)\ **Replies:** 0\ **Last updated:** [October 27, 2020, 1:22am UTC](https://forums.kodeco.com/t/adding-an-empty-directory-to-the-staging-area/123500 "2020-10-27T01:22:19Z")
Hi, I donā€™t know if I am doing something wrong but section 3.4 says that after creating the .keep file in the tutorials directory, you can write git add tutorials/\*. as a way to add only that directory to the staging aā€¦ --- ## [Pdf version for version 2.0](https://forums.kodeco.com/t/pdf-version-for-version-2-0/122937)
**Author:** [@caribouj](https://forums.kodeco.com/u/caribouj)\ **Replies:** 3\ **Last updated:** [October 26, 2020, 3:43pm UTC](https://forums.kodeco.com/t/pdf-version-for-version-2-0/122937 "2020-10-26T15:43:36Z")
Hello! Where can I find the .pdf version that you were previously distributing also with the .epub version? Thanks for your reply --- ## [Best practice on handling multiple versions of nested RXSwift Community dependencies (cocoapods)](https://forums.kodeco.com/t/best-practice-on-handling-multiple-versions-of-nested-rxswift-community-dependencies-cocoapods/119252)
**Author:** [@mussacharles](https://forums.kodeco.com/u/mussacharles)\ **Replies:** 3\ **Last updated:** [October 25, 2020, 7:34pm UTC](https://forums.kodeco.com/t/best-practice-on-handling-multiple-versions-of-nested-rxswift-community-dependencies-cocoapods/119252 "2020-10-25T19:34:46Z")
Hello, thanks once again for such a great book. On section 5 the book introduce RxSwift Community which itā€™s a great source of ready to use Rx extensions. Upon going through the existing extensions, I found out that mosā€¦ --- ## [Chapter 2 bobblehead enemy bodies](https://forums.kodeco.com/t/chapter-2-bobblehead-enemy-bodies/123257)
**Author:** [@jedirex92](https://forums.kodeco.com/u/jedirex92)\ **Replies:** 1\ **Last updated:** [October 24, 2020, 4:26am UTC](https://forums.kodeco.com/t/chapter-2-bobblehead-enemy-bodies/123257 "2020-10-24T04:26:59Z")
So I started creating the enemy. Now I donā€™t mind that I had to make some weird scaling decisions with regards to the head, but the body is all dissarayed like so Now Iā€™ve checked previous issues and I could not find ā€¦ --- ## [Chapter 4 problem image lookup](https://forums.kodeco.com/t/chapter-4-problem-image-lookup/122869)
**Author:** [@marvmax](https://forums.kodeco.com/u/marvmax)\ **Replies:** 2\ **Last updated:** [October 22, 2020, 3:54pm UTC](https://forums.kodeco.com/t/chapter-4-problem-image-lookup/122869 "2020-10-22T15:54:12Z")
When I execute image lookup -n ā€œ-\[UIViewController viewDidLoad\]ā€ I donā€™t get anything back like the example in the book. It doesnā€™t give an error it just returns nothing. --- ## [Whats the problem here](https://forums.kodeco.com/t/whats-the-problem-here/123160)
**Author:** [@tannerstone20](https://forums.kodeco.com/u/tannerstone20)\ **Replies:** 3\ **Last updated:** [October 22, 2020, 3:52pm UTC](https://forums.kodeco.com/t/whats-the-problem-here/123160 "2020-10-22T15:52:24Z")
--- ## [What happened to the text here?](https://forums.kodeco.com/t/what-happened-to-the-text-here/123086)
**Author:** [@garethprice](https://forums.kodeco.com/u/garethprice)\ **Replies:** 2\ **Last updated:** [October 21, 2020, 4:08pm UTC](https://forums.kodeco.com/t/what-happened-to-the-text-here/123086 "2020-10-21T16:08:05Z")
A lot of the content here is jibberishā€¦ https://www.raywenderlich.com/books/watchos-by-tutorials/v3.0/chapters/20-advanced-complications#toc-chapter-023-anchor-004 --- ## [Book is not longer available?](https://forums.kodeco.com/t/book-is-not-longer-available/120404)
**Author:** [@fdorado985](https://forums.kodeco.com/u/fdorado985)\ **Replies:** 15\ **Last updated:** [September 24, 2020, 9:39pm UTC](https://forums.kodeco.com/t/book-is-not-longer-available/120404 "2020-09-24T21:39:29Z")
I couldnā€™t download Swift Apprentice book, I tried to look it from my purchases, but it seems the link doesnā€™t exist, I couldnā€™t find on the store neither. --- ## [Chapter 2 mini exercise help](https://forums.kodeco.com/t/chapter-2-mini-exercise-help/121974)
**Author:** [@shaogden](https://forums.kodeco.com/u/shaogden)\ **Replies:** 3\ **Last updated:** [October 19, 2020, 5:15pm UTC](https://forums.kodeco.com/t/chapter-2-mini-exercise-help/121974 "2020-10-19T17:15:53Z")
Hello, I am having problems with the 3 part of the question in the mini exercise. Declare a constant tuple that contains three Int values followed by a Double. Use this to represent a date (month, day, year) followed ā€¦ --- ## [Chapter 16 ,Challenge solution 's test not pass in catalyst](https://forums.kodeco.com/t/chapter-16-challenge-solution-s-test-not-pass-in-catalyst/120400)
**Author:** [@yangwulong1978](https://forums.kodeco.com/u/yangwulong1978)\ **Replies:** 1\ **Last updated:** [October 18, 2020, 5:41pm UTC](https://forums.kodeco.com/t/chapter-16-challenge-solution-s-test-not-pass-in-catalyst/120400 "2020-10-18T17:41:55Z")
yesterday I update my mac system to latest one, and update Xcode to 12 as well. open Chapter 16 challenge folderā€™s solution, for below test, can not pass when target to catalyst. when I run project ,manual operate the ā€¦ --- ## [Chapter 4: Chaining Futures](https://forums.kodeco.com/t/chapter-4-chaining-futures/109995)
**Author:** [@pintiboy](https://forums.kodeco.com/u/pintiboy)\ **Replies:** 8\ **Last updated:** [October 16, 2020, 9:04pm UTC](https://forums.kodeco.com/t/chapter-4-chaining-futures/109995 "2020-10-16T21:04:46Z")
At the section ā€œChaining futuresā€ I can see this example code here: Is that first block of code (marked line) correct? Why is it flatmapped to HTTPStatus.self? Shouldnā€™t it be User.self or rather \[User\].self? In the ā€¦ --- ## [Chapter 22 - getLocation button - method](https://forums.kodeco.com/t/chapter-22-getlocation-button-method/122335)
**Author:** [@noah8610](https://forums.kodeco.com/u/noah8610)\ **Replies:** 0\ **Last updated:** [October 11, 2020, 10:37am UTC](https://forums.kodeco.com/t/chapter-22-getlocation-button-method/122335 "2020-10-11T10:37:12Z")
Could anyone help to implementing @IBAction getLocation() with the updated function in iOS 14? authorizationStatus() was deprecated in iOS 14.0. func locationManagerDidChangeAuthorization( \_ manager: CLLocationManager) ā€¦ [Previous page](https://forums.kodeco.com/c/books/6.md?page=59) [Next page](https://forums.kodeco.com/c/books/6.md?page=61)