#invalidateLayout
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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)
#ios#brian#facebook feed#facebook#setTitle#setTitleColor#button#setImage#titleEdgeInsets#insets#inset#equal#equally#viewWillTransitionToSize#orientation#invalidateLayout#NSLayoutConstraint#UICollectionView
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