4 Raw Runtime Functions

(objc_lookUpClass s) → (or/c _Class #f)

s : string?

Finds a registered class by name.

(sel_registerName s) → _SEL

s : string?

Interns a selector given its name in string form.

(objc_allocateClassPair cls s extra) → _Class

cls : _Class

s : string?

extra : integer?

Allocates a new Objective-C class.

(objc_registerClassPair cls) → void?

cls : _Class

Registers an Objective-C class.

(object_getClass obj) → _Class

obj : _id

Returns the class of an object (or the meta-class of a class).

(class_addMethod   cls             sel             imp             type             type-encoding)   →   boolean?

cls : _Class

sel : _SEL

imp : procedure?

type : ctype?

type-encoding : string?

Adds a method to a class. The type argument must be a FFI C type (see Type Constructors) that matches both imp and and the not Objective-C type string type-encoding.

(class_addIvar   cls             name             size             log-alignment             type-encoding)   →   boolean?

cls : _Class

name : string?

size : exact-nonnegative-integer?

log-alignment : exact-nonnegative-integer?

type-encoding : string?

Adds an instance variable to an Objective-C class.

(object_getInstanceVariable obj name)   →   _Ivar   any/c

obj : _id

name : string?

Gets the value of an instance variable whose type is _pointer.

(object_setInstanceVariable obj name val) → _Ivar

obj : _id

name : string?

val : any/c

Sets the value of an instance variable whose type is _pointer.

_Ivar : ctype?

The type of an Objective-C instance variable, an opaque pointer.

((objc_msgSend/typed types) obj sel arg) → any/c

types : (vector/c result-ctype arg-ctype ...)

obj : _id

sel : _SEL

arg : any/c

Calls the Objective-C method on _id named by sel. The types vector must contain one more than the number of supplied args; the first FFI C type in type is used as the result type.

((objc_msgSendSuper/typed   types)             super             sel             arg)   →   any/c

types : (vector/c result-ctype arg-ctype ...)

super : _objc_super

sel : _SEL

arg : any/c

Like objc_msgSend/typed, but for a super call.

(make-obj_csuper id super) → _objc_super   id : _id   super : _Class

_objc_super : ctype?

Constructor and FFI C type use for super calls.