Here are 5 of my favorite iOS development blogs
raywenderlich.com
Without doubt this blog features the widest range of iPhone tutorials I’ve seen. They are explained simply but in great detail and there is a particular focus on game development.
Maniacdev.com
For more advanced developers, this blog offers lots of new tricks and tips to enhance your development skills
iphonedevelopment.blogspot.co.uk
Written by veteran coder Jeff Lamarche, this blog isn’t updated as regularly as the others but is worth following for the occasional brilliant insight.
mobileorchard.com
This is a well established site covering mobile development in general. A good source for the latest development news
iosdeveloperguide.com
Sorry, I couldn’t resist….
Can you recommend any others?