Given that iOS 5 is already announced for this fall, does that mean this book's lifespan is only 4 months? How much content is iOS 4 framework-specific, vs teaching Objective-C as a language?
Of course this book is so valid when iOS 5 is out.
iOS 5 isn't iOS being written from the scratch, it is built upon iOS 4. You can check what is new in iOS 5 and learn them by yourself, shouldn't be that difficult.
There won't be major change in the APIs between iOS 4 & iOS 5. Framework may get new APIs or existing APIs may get changed, but chances for version specific framework are so less.
I am working since when iOS 2.2 in the market. I have never face major difficulties due to API differences.
You need to get your hands dirty with iOS SDK in general before you can use these new apis. This book will be useful not only for a new comer, but also for an experienced developer.
Thanks,
Snehasish.
Adobe Certified Expert Flex 4(ACE) (89%), SCJP 5.0 (97%), SCWCD 5.0 (100%), Adobe AIR/Java /J2EE/Spring/Apple iPhone & iPad Application Developer.
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