Mobile Developer Tips » Objective-C

Instance Variables in the Implementation File

John Muchow — Mon, 05 Mar 2012 07:07:13 +0000

Instance Variables in the Implementation File is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Within Xcode, if you set the compiler option to Apple LLVM compiler 2.1 (or greater), you can move your instance variable declarations from the interface file to the implementation file. For example, here is a traditional interface definition [...] Related posts:

Objective-C Comment Styles

John Muchow — Mon, 26 Sep 2011 08:12:40 +0000

Objective-C Comment Styles is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved A few weeks ago I wrote about Objective-C Indentation Styles. A reader (thanks Joe) commented and suggested a similar post that covered comment formats. That blog post follows… Interface File Comments When I create an interface file, here is the basic [...] Related posts:

Objective-C Indentation Styles

John Muchow — Tue, 06 Sep 2011 07:33:18 +0000

Objective-C Indentation Styles is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Discussions with developers about their preferred indentation style often seems to stir the same passion as one’s preference for beer, wine or cocktails. This post isn’t as much a tip or trick, as it is an opportunity for developers to share [...] Related posts:

Introduction to Blocks in Objective-C – Part 2

John Muchow — Mon, 29 Aug 2011 08:45:19 +0000

Introduction to Blocks in Objective-C – Part 2 is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved In the first post on blocks, Introduction to Blocks in Objective-C – Part 1, I covered the basics for creating block variables, working with __block modifier and using typedef to define blocks. In this post I [...] Related posts:

Introduction to Blocks in Objective-C – Part 1

John Muchow — Mon, 22 Aug 2011 06:09:05 +0000

Introduction to Blocks in Objective-C – Part 1 is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Beginning with iOS 4.0, Apple introduced blocks, which look and operate much like C functions. However, blocks offer many interesting capabilities beyond functions as you know and love them today. A block is really nothing more [...] Related posts:

Using the @class Directive

John Muchow — Mon, 03 Jan 2011 08:09:34 +0000

Using the @class Directive is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved The @class directive often seems to be a point of confusion. Let me try and provide a little insight. The @class directive sets up a forward reference to another class. For example, in the code below the reference to @class [...] Related posts:

The Basics of Protocols and Delegates

John Muchow — Fri, 16 Apr 2010 12:00:32 +0000

The Basics of Protocols and Delegates is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved Apple offers a good overview of working with protocols in their Objective-C Programming Reference. However, sometimes a simple working example can go a long ways… Introduction Protocols can be helpful in a number of scenarios, a common usage [...] Related posts:

Fast Enumeration on the iPhone

John Muchow — Fri, 02 Oct 2009 12:10:51 +0000

Fast Enumeration on the iPhone is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved With the introduction of Objective-C 2.0, you can now iterate through collections (arrays, etc) with ease using a language feature known as Fast Enumeration. This enumeration is both faster than using NSEnumerator and is also much more concise as [...]

Specifying Simulator Only Code

John Muchow — Wed, 15 Apr 2009 03:28:47 +0000

Specifying Simulator Only Code is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved There are times when you need to write code that is only applicable when working with the simulator. As an example, I was recently working with an application that required the user to take a picture with their iPhone. Once [...] Related posts:

Of BOOL and YES

Steve — Wed, 31 Dec 2008 19:28:56 +0000

Of BOOL and YES is protected by Copyright © MobileDeveloperTips.com 2008-2012 • All Rights Reserved It may not be immediately clear that the Objective C BOOL "type" is not actually a boolean type at all. This is a legacy from the original C language, which does not have an intrinsic boolean type (the iPhone GCC [...]