If you’re experiencing the error “An App ID with Identifier ‘com.teachyourselfios.Welcome’ is not available” when trying to install the Welcome app on your device, the fix should be simple (and wasn’t required until recently). Click the Welcome project group in…

Hour 6, page 215 – there is text remaining from the Objective-C edition that mentions a “interface file.” Swift classes are contained within a single file. The text should state that actions are defined after global variable properties in the…

Hour 4, page 147, in the section “Using Quick Help” – Apple has changed the NSDate class so that it properly returns an NSDate object, instead of AnyObject. Unfortunately, my example was not updated to reflect this.

Hour 3, page 92, in the second paragraph of the “Downcasting” section – I state that we need to tell Xcode that an object is an NSDate. This should really be “MyObject.” I had originally written the text using specific…

In Hour 3, page 122, answer 10, the correct answer is spelled out, but the wrong letter is provided. It should be ‘A’, not ‘B’.

In Hour 3, I use this code to demonstrate how to replace my last name (Ray) with “is awesome!”: var myFullName: String = “John Ray” var myDescription: String = myFullName.stringByReplacingOccurrencesOfString(myFullName, withString: “is awesome!”) This is incorrect. As written, this would…

The horizontal and vertical guides are now accessed by choosing Editor, Canvas, Add Guide.

In the last paragraph on page 86 (Hour 3), I reference “myInstanceMethod” being defined on line 14. This is incorrect – it is actually defined on line 17.

Having trouble with the Hour 1 Welcome project? Please download the updated tutorial archive – posted May 6th, 2015. A change in the Swift project templates with the latest version of Xcode prevented the application from running.