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iPhone App Development: The Missing Manual, by Craig Hockenberry
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Anyone with programming experience can learn how to write an iPhone app. But if you want to build a great app, there's a lot more to it than simple coding: you also need to know how design and market your creation. This easy-to-follow guide walks you through the entire process, from sketching out your idea to promoting the finished product.
- Get to know the tools for developing your iPhone app
- Design a great app before you start coding
- Build a complex app with Xcode and Interface Builder
- Decide how to brand your app-then beta-test that brand in the real world
- Learn the inside scoop on how to get your app into the App Store
- Promote your product, track sales, and build a strong customer following
By Craig Hockenberry
On multitasking phones like the iPhone 3GS and iPhone 4, you can make it so your application doesn’t quit when the user presses the Home button. Instead, the app just goes into the background and reappears just as it was with a tap on its icon. You can give your app multitasking powers without writing a single line of code!
First, download and install the free iOS 4 SDK from Apple’s iPhone Dev Center. You need both Xcode 3.2.3 and iPhone SDK 4 to create an app for iOS 4. (By the way, you may see the SDK described as either “iOS SDK” and “iPhone SDK.” They mean the same thing.)
Now you’re just a few steps away from a multitasking app:
- 1. Open your iPhone app project in the new version of Xcode, and then choose Project > Edit Project Settings to update your project settings.
2. In the General tab, change the Base SDK for All Configurations from “iPhone Device 3.0 (missing)” to “iPhone Device 4.0.”
3. In the Build tab, set the Configuration to “Release” and enter a search for “target.”
You should now see the following:
- In the Architecture section, the “Base SDK” setting is now “iPhone Device 4.0,” which means that Xcode will build your app with the iOS 4.0 SDK.
- In the Deployment section, you'll see “iPhone OS Deployment Target.” This setting defines the oldest version of the iPhone OS where you want your app to be able to run. If your app used to run on version 3.0, you can change this setting to “iPhone OS 3.0.”
Now you can build your app in the usual way and test it on an iPhone.
You may want to make one further refinement, since the iPhone may terminate multitasking apps when the OS or another app needs more memory. To reduce the chances of your app getting purged from memory, clear out any caches or other data that can easily be reconstructed. Luckily, the system notifies your app when it puts the app into the background: that’s your chance to clear out this temporary memory. It’s also a good time to save any state or other information that you’ll use the next time your application is launched. You can capture the notification in one of two ways: through a - applicationDidEnterBackground: method in your application delegate or by registering for the UIApplicationDidEnterBackgroundNotification in your view controllers. If you’re saving application-wide information, the delegate is the best choice. If you need to keep some of your controller’s model data, the notification is usually easier. You can use both techniques if necessary.
For more information on multitasking in iOS 4, check out “Supporting Multitasking In Your Applications” in the iPhone Dev Center.
- Sales Rank: #471834 in Books
- Published on: 2010-05-14
- Original language: English
- Number of items: 1
- Dimensions: 9.19" h x .73" w x 7.00" l, 1.02 pounds
- Binding: Paperback
- 352 pages
About the Author
Craig Hockenberry has been working with images and software for over 30 years. He is currently a principal at the Iconfactory, a company that has been changing the face of the computer desktop since 1996. Their work includes the design & production of icons for Microsoft, Apple, Adobe and other leading software companies.
He's also responsible for the secret control panels at Icon Factory, a website that gives away about 2 terabytes of pixels every month, and keeps many fellow designers informed and entertained.
Craig also loves writing cool software, and thinks that Cocoa and Quartz (for the desktop and iPhone) and Ruby and Rails (for the Web) are the greatest things since sliced bread.
In past lives, Craig has built robots, processed satellite imagery, and created effects filters for Photoshop.
Most helpful customer reviews
16 of 17 people found the following review helpful.
This is THE "Dive into..." book for iPhone App Development
By Duane Sibilly II
I've been looking to get into iPhone OS development this spring, and most books I've come across have fallen into one of two categories:
1) they expect you to have a background in Mac OS X's Objective-C development frameworks or...
2) they're written like a reference book and thus make it difficult to learn the ropes in a step-by-step fashion.
Craig Hockenberry's iPhone App Development: The Missing Manual changes that frustrating pattern. By introducing the world of developing an iPhone app in a way that requires just a bit of programming experience, Hockenberry makes instantly accessible the Objective-C language, the XCode IDE, and the design processes that go into taking your app from notepad sketch to App Store success and beyond. The text is clear and approachable, and Craig's jolly writing style makes grasping important concepts and following along with examples both fun and memorable.
I highly recommend this book to anyone with any C-like programming experience who is interested in writing apps for the iPhone OS.
42 of 51 people found the following review helpful.
Barely usable
By M. Pasamonik
My job suddenly required me to do iPhone development, so I got this book in hopes that it would cover most of the major aspects of the iphone sdk. Instead book starts out with a "flashlight app" template that you don't actually have to write any code for (it's literally an empty project that you hit compile on), then spends the next few chapters going over basic obj-c, making crappy cardboard cutouts of an iphone to help you "get the feel" of the program flow (seriously!), and a bunch of other nonsense that shouldn't be in a programming book. Then it randomly jumps back to the flashlight app for one chapter where the author tries to turn it into a real app, with menus and whatnot. This chapter would have been useful if it was actually written in a way that amounted to more than just "ok you do this and this and you're done." The book then goes on to how to get your flashlight app in the app store for the remainder of the book. Just about everything is infuriating about this book - the chapter organization, the lack of any real iphone development instruction, the fact that every other sentence contains the word "awesome" or some lame joke. They should change the name of this book to "AWESOME Flashlight Apps: The AWESOME Missing Manual AWESOME".
I'm currently reading "The iPhone Developer's Cookbook," which is actually much more informative and sticks to actual iPhone development for the majority of the book.
9 of 11 people found the following review helpful.
CHOCKLOCK rules! Useful advice from a software engineer.
By obecka dell
As the series tag says, this book should have been included in the Xcode box. I haven't finished reading it but it already has provided me solid nuggets of information that I had not yet gleaned in a couple of years of iPhone development and has saved me dev time and improved my implementation cleanliness (many thanks to the author for that).
Prior to getting this book, I had been aware of the author's sage advice on his blog and twitter feed. The author is the real deal and this book does not disappoint.
Building an iPhone app from start to finish, this book explains the dev environment, language, app design and app management process, while simultaneously managing to discusses the pros and cons of various tradeoffs you need to make an app. I am impressed at its conciseness and the conveyed depth of understanding of what it takes to get a robust, shipping product. The specific information about using the command line versions of various Xcode tools is something that I haven't seen elsewhere and am finding it extremely helpful.
If you are looking to polish your iphone app dev skills, or just make them more AWESOME!!!, this book will help.
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