Below is a list of online resources I have found incredibly useful whilst climbing the Xcode / iOS learning curve. If you've got others please let me know in the comments!
- iOS Dev Center
This is pretty much your central bookmark for all things Apple / iOS related. You'll be given access to different types of resource depending on the type and details of your developer account (e.g. iOS Beta downloads are only made available to paid-up, confirmed developers)
- Xcode 4.2 on the Mac App Store
Note: you'll only be able to get Xcode from the MAS if you're running OS X Lion. If you're still on Snow Leopard then grab it from the iOS Dev Center.
- iOS Human Interface Guidelines
The essential design guide for app developers. Read and digest before writing your first line of code!
Developer links and blogs. (Note: many links on this list has been sourced from this post on ClingMarks.)
- Ray Wenderlich | Tutorials for iPhone / iOS Developers and Gamers
- Call Me Fishmeal ( )
- Flyosity: Mike Rundle's interface design blog
- Cocoa Is My Girlfriend
- Use Your Loaf
- iPhone Development Blog