The following classes are toll-free bridged:
Foundation *General/NSArray = General/CFArray *General/NSMutableArray = General/CFMutableArray *General/NSAttributedString = General/CFAttributedString (Mac OS X only, not iOS) *General/NSMutableAttributedString = General/CFMutableAttributedString (Mac OS X only, not iOS) *General/NSCalendar = General/CFCalendar *General/NSCharacterSet = General/CFCharacterSet *General/NSMutableCharacterSet = General/CFMutableCharacterSet *General/NSData = General/CFData *General/NSMutableData = General/CFMutableData *General/NSDate = General/CFDate *General/NSDictionary = General/CFDictionary *General/NSMutableDictionary = General/CFMutableDictionary *General/NSError = General/CFError *General/NSLocale = General/CFLocale *General/NSNumber = General/CFNumber *General/NSNumber *partially bridged with General/CFBoolean, for booleans only *General/NSTimer = General/CFRunLoopTimer *General/NSTimeZone = General/CFTimeZone *General/NSSet = General/CFSet *General/NSMutableSet = General/CFMutableSet *General/NSStream = General/CFStream *General/NSInputStream = General/CFReadStream *General/NSOutputStream = General/CFWriteStream *General/NSString = General/CFString *General/NSMutableString = General/CFMutableString *General/NSUrL = CFURL *General/AppKit *General/NSFont = General/CTFont *General/NSFontDescriptor = General/CTFontDescriptor *Disc Recording *General/DRBurn = General/DRBurnRef *General/DRErase = General/DREraseRef *General/DRDevice = General/DRDeviceRef *General/DRTrack = General/DRTrackRef *General/DRFile = General/DRFileRef *General/DRFolder = General/DRFolderRef (starting with 10.3) *Address Book *General/ABAddressBook = General/ABAddressBookRef *General/ABGroup = General/ABGroupRef *General/ABMultiValue = General/ABMultiValueRef *General/ABMutableMultiValue = General/ABMutableMultiValueRef *General/ABPerson = General/ABPersonRef *General/ABRecord = General/ABRecordRef *General/ABSearchElement = General/ABSearchElementRef
The following classes are not toll-free bridged:
*General/NSBundle and General/CFBundle *General/NSCountedSet and General/CFBag *General/NSDateFormatter and General/CFDateFormatter *General/NSNumberFormatter and General/CFNumberFormatter *General/NSHost and General/CFHost *General/NSNotificationCenter and General/CFNotificationCenter *General/NSRunLoop and General/CFRunLoop *General/NSSocket and General/CFSocket *General/NSUserDefaults and General/CFPreferences *General/AppKit *General/NSColor, General/CIColor, and General/CGColor *General/NSColorSpace and General/CGColorSpace *General/NSFont and General/CGFont *General/NSGradient and General/CGGradient *General/NSImage and General/CGImage
See also General/TollFreeBridging.
If you wonder whether an General/ObjC class is bridged and can’t find docs, send an object of the class the _cfTypeID message. If you get back ‘1’, it isn’t bridged. For more detail see General/HowToCreateTollFreeBridgedClass.