Foundation Changes for Objective-C Foundation NSOrthography.h Modified NSOrthography Protocols FromNSCoding, NSCopying ToNSCopying, NSSecureCoding NSRegularExpression.h Modified NSRegularExpression Protocols FromNSCoding, NSCopying ToNSCopying, NSSecureCoding NSTextCheckingResult.h Modified NSTextCheckingResult Protocols FromNSCoding, NSCopying ToNSCopying, NSSecureCoding NSUserDefaults.h Added NSUbiquitousUserDefaultsCompletedInitialSyncNotification Added NSUbiquitousUserDefaultsDidChangeAccountsNotification Added NSUserDefaultsSizeLimitExceededNotification