詳しくはないが概要を知るのにちょうどいい長さ。
内容
Day 0 :: UIKit Dynamics
Day 1 :: NSURLSession
Day 2 :: Asset Catalog
Day 3 :: Background Fetch
Day 4 :: AVSpeechSynthesizer
Day 5 :: UIDynamics with Collection Views
Day 6 :: Tint Color
Day 7 :: Taking Snapshots of UIViews
Day 8 :: Reading list with SafariServices
Day 9 :: Device Identification
Day 10 :: Custom UIViewController Transitions