Paul Hegarty covers error handling in Swift, extensions, protocols, delegation, and then concludes with scroll view.
All the lecture slides pdfs, demo codes and reading assignments can be found here:
https://drive.google.com/open?id=0B23KBOrLr6lIVWh5TkJMdk95V3M
https://itunes.apple.com/cn/course/7-error-handling-extensions-protocols-delegation-scroll/id1198467120?i=1000382164717
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