It's possible you're not aware that UIAlertView has been deprecated in iOS 8 as Xcode is not even flagging it as a warning. If you're in that situation, you may have put off learning about UIAlertController which serves as a replacement for both UIAlertView and UIActionSheet. Mattt Thompson has all the details, as always!
There have been some significant enhancements to both the tools, and the technology behind Auto Layout in iOS 8. This is great news as Adaptive Layout really did sound the death knell for Springs and Struts. Sam Davies digs into the new layout margins properties as part of his excellent iOS 8 Day by Day series.
New (ish) blog by Warren Moore who used to work at Apple on the camera/photos iOS apps. It's a comprehensive introduction to all aspects of Metal. The blog is going to be turned into a book at some point but this is a good chance to get a sneak preview of some of that content.