NSObject is the root class of the Cocoa frameworks. This class defines the base functionality that enables objects to work with the Objective-C runtime.

@interface NSObject <NSObject>
// Initializers
- (id)init;
// Class Methods
+ (id)alloc;
+ (id)allocWithZone:(NSZone *)zone;
+ (Class)class;
+ (BOOL)conformsToProtocol:(Protocol *)protocol;
+ (id)copyWithZone:(NSZone *)zone;
+ (NSString *)description;
+ (void)initialize;
+ (IMP)instanceMethodForSelector:(SEL)aSelector;
+ (NSMethodSignature *)instanceMethodSignatureForSelector:(SEL)aSelector;
+ (BOOL)instancesRespondToSelector:(SEL)aSelector;
+ (BOOL)isSubclassOfClass:(Class)aClass;
+ (void)load;
+ (id)mutableCopyWithZone:(NSZone *)zone;
+ (id)new;
+ (void)poseAsClass:(Class)aClass;
+ (void)setVersion:(int)aVersion;
+ (Class)superclass;
+ (int)version;
// Instance Methods
- (void)URL:(NSURL *)sender resourceDataDidBecomeAvailable:(NSData *)newBytes;
- (void)URL:(NSURL *)sender resourceDidFailLoadingWithReason:(NSString *)reason;
- (void)URLResourceDidCancelLoading:(NSURL *)sender;
- (void)URLResourceDidFinishLoading:(NSURL *)sender;
- (id)awakeAfterUsingCoder:(NSCoder *)aDecoder;
- (unsigned long)classCode;
- (Class)classForArchiver;
- (Class)classForCoder;
- (Class)classForKeyedArchiver;
- (Class)classForPortCoder;
- (NSString *)className;
- (id)copy;
- (void)dealloc;
- (void)doesNotRecognizeSelector:(SEL)aSelector;
- (void)forwardInvocation:(NSInvocation *)anInvocation;
- (IMP)methodForSelector:(SEL)aSelector;
- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector;
- (id)mutableCopy;
- (void)performSelector:(SEL)aSelector withObject:(id)anArgument afterDelay:(NSTimeInterval)delay;
- (void)performSelector:(SEL)aSelector withObject:(id)anArgument afterDelay:(NSTimeInterval)delay inModes:(NSArray *)modes;
- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait;
- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait modes:(NSArray *)array;
- (id)replacementObjectForArchiver:(NSArchiver *)archiver;
- (id)replacementObjectForCoder:(NSCoder *)aCoder;
- (id)replacementObjectForKeyedArchiver:(NSKeyedArchiver *)archiver;
- (id)replacementObjectForPortCoder:(NSPortCoder *)coder;
// Methods Implementing NSObject
- (BOOL)isEqual:(id)object;
- (unsigned)hash;
- (Class)superclass;
- (Class)class;
- (id)self;
- (NSZone *)zone;
- (id)performSelector:(SEL)aSelector;
- (id)performSelector:(SEL)aSelector withObject:(id)object;
- (id)performSelector:(SEL)aSelector withObject:(id)object1 withObject:(id)object2;
- (BOOL)isProxy;
- (BOOL)isKindOfClass:(Class)aClass;
- (BOOL)isMemberOfClass:(Class)aClass;
- (BOOL)conformsToProtocol:(Protocol *)aProtocol;
- (BOOL)respondsToSelector:(SEL)aSelector;
- (id)retain;
- (oneway void)release;
- (id)autorelease;
- (unsigned)retainCount;
- (NSString *)description;

Subclasses

NSObject is a root class.