This concrete subclass of NSCoder provides a means to decode objects that have been encoded in a keyed archive. The companion class NSKeyedArchiver provides the means to create such keyed archives from a set of objects. Archiving is described in greater detail in Chapter 2.

@interface NSKeyedUnarchiver : NSCoder
// Initializers
- (id)initForReadingWithData:(NSData *)data;
// Accessor Methods
- (void)setDelegate:(id)delegate;
- (id)delegate;
- (void)setClass:(Class)cls forClassName:(NSString *)codedName;
// Class Methods
+ (Class)classForClassName:(NSString *)codedName;
+ (void)setClass:(Class)cls forClassName:(NSString *)codedName;
+ (id)unarchiveObjectWithData:(NSData *)data;
+ (id)unarchiveObjectWithFile:(NSString *)path;
// Instance Methods
- (int32_t)decodeInt32ForKey:(NSString *)key;
- (const uint8_t *)decodeBytesForKey:(NSString *)key returnedLength:(unsigned *)lengthp;
- (double)decodeDoubleForKey:(NSString *)key;
- (Class)classForClassName:(NSString *)codedName;
- (BOOL)containsValueForKey:(NSString *)key;
- (BOOL)decodeBoolForKey:(NSString *)key;
- (float)decodeFloatForKey:(NSString *)key;
- (int64_t)decodeInt64ForKey:(NSString *)key;
- (int)decodeIntForKey:(NSString *)key;
- (id)decodeObjectForKey:(NSString *)key;
- (void)finishDecoding;
// Methods Implemented by the Delegate
- (Class)unarchiver:(NSKeyedUnarchiver *)unarchiver cannotDecodeObjectOfClassName:(NSString *)name originalClasses:(NSArray *)classNames;
- (id)unarchiver:(NSKeyedUnarchiver *)unarchiver didDecodeObject:(id)object;
- (void)unarchiver:(NSKeyedUnarchiver *)unarchiver willReplaceObject:(id)object withObject:(id)newObject;
- (void)unarchiverDidFinish:(NSKeyedUnarchiver *)unarchiver;
- (void)unarchiverWillFinish:(NSKeyedUnarchiver *)unarchiver;