This class encapsulates information about an Objective-C message such as the selector and the target of the message. NSInvocations are useful for statically storing a message and are often used with timers, and for message forwarding.

@interface NSInvocation : NSObject <NSCoding>
// Convenience Constructors
+ (NSInvocation *)invocationWithMethodSignature:(NSMethodSignature *)sig;
// Accessor Methods
- (void)setSelector:(SEL)selector;
- (SEL)selector;
- (void)setTarget:(id)target;
- (id)target;
- (void)setReturnValue:(void *)retLoc;
- (void)setArgument:(void *)argumentLocation atIndex:(int)index;
// Instance Methods
- (void)getReturnValue:(void *)retLoc;
- (void)invoke;
- (void)getArgument:(void *)argumentLocation atIndex:(int)index;
- (BOOL)argumentsRetained;
- (void)invokeWithTarget:(id)target;
- (NSMethodSignature *)methodSignature;
- (void)retainArguments;
// Methods Implementing NSCoding
- (void)encodeWithCoder:(NSCoder *)aCoder;
- (id)initWithCoder:(NSCoder *)aDecoder;