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!

Apple resources

  • 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.)

Thanks and I hope you enjoy