iOS autolayout tutorials

I solved some autolayout issues without much priori knowledge. Though it took long, it peaked my interest in reading more about autolayout. Below are few links ( mostly google results) about autolayout that I am hoping to read more thoroughly and write some blog posts on

iOS apple autolayout guide

Ray Wenderlich beginning autolayout tutorial part 1

Ray Wenderlich beginning autolayout tutorial part 2 

Mobile OOP autolayout advanced tutorial

Debugging autolayout issues

iOS autolayout tutorials