Saving (and Retrieving) Android Instance State – Part 1 – Intertech Blog

Saving (and Retrieving) Android Instance State – Part 1 – Intertech Blog

iphone device current orientation in ViewDidLoad

iphone device current orientation in ViewDidLoad

Getting device orientation in Swift

How to lock orientation of one view controller to portrait mode only in Swift

Swift: Create Facebook (Part 2) – UICollectionView, NSLayoutConstraint

my review point is 8/10

https://youtu.be/ZwBYQpLQAvw?t=8m15s   button style ( setTitle, setTitleColor , setImage , titleEdgeInsets)

https://youtu.be/ZwBYQpLQAvw?t=14m35s   equally spaced out elements 

https://youtu.be/ZwBYQpLQAvw?t=18m37s   refresh collection view when user change orientation ( viewWillTransitionToSize , invalidateLayout)