IMP

A pointer to the start of a method implementation.

Declaration 宣言 

id (*IMP)(id, SEL, ...)

Overview 概要

This data type is a pointer to the start of the function that implements the method. This function uses standard C calling conventions as implemented for the current CPU architecture. The first argument is a pointer to self (that is, the memory for the particular instance of this class, or, for a class method, a pointer to the metaclass). The second argument is the method selector. The method arguments follow.

See Also 参照

Class-Definition Data Structures

Class
An opaque type that represents an Objective-C class.
Method
An opaque type that represents a method in a class definition.
Ivar
An opaque type that represents an instance variable.
Category
An opaque type that represents a category.
objc_property_t
An opaque type that represents an Objective-C declared property.
SEL
Defines an opaque type that represents a method selector.
objc_method_description
Defines an Objective-C method.
objc_cache
Performance optimization for method calls. Contains pointers to recently used methods.
objc_property_attribute_t
Defines a property attribute.