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ios 에서 간단한 정보를 저장
NSKeyedArchiver
NSUserDefaults
를 이용할수 있다.
https://youtu.be/2idtKQ_NqTs?t=1m41s 참조
Free iOS Tutorial - NSUserDefaults with Swift 2
Free iOS Tutorial – NSUserDefaults with Swift 2
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Action on iOS 8 notifications on lockscreen causes cfprefsd crash, which wipes all NSUserDefaults data
Occasionally, when an iOS 8 device receives a push notification, and a user presses one of the action buttons on the locked device, the cfprefsd process immediately crashes (crash log attached). What's more, the crash results in all data in NSUserDefaults related to this app to be temporarily "lost" -- upon re-opening the app, if we try to print out the stuff in our NSUserDefaults, nothing gets printed out. The app is in an unusable state. However, if we force quit the app now and restart, the NSUserDefaults data comes back.
https://openradar.appspot.com/21992038
MSStringifyMacros provides a convenient shortcut to the normally tedious and potentially error-prone standard approach to coding for NSUserDefaults and NSCoding.
macro for iOS and OSX development