Function 関数

object_getIndexedIvars

Returns a pointer to any extra bytes allocated with a instance given object. あるインスタンス、与えられたオブジェクト、でアロケートされた何らかの余分なバイトへのポインタを返します。

Declaration 宣言 

void * object_getIndexedIvars(id obj);

Parameters パラメータ

obj

An Objective-C object. あるObjective-Cオブジェクト。

Return Value 戻り値

A pointer to any extra bytes allocated with obj. If obj was not allocated with any extra bytes, then dereferencing the returned pointer is undefined.

Discussion 解説

This function returns a pointer to any extra bytes allocated with the instance (as specified by class_createInstance with extraBytes>0). This memory follows the object's ordinary ivars, but may not be adjacent to the last ivar.

The returned pointer is guaranteed to be pointer-size aligned, even if the area following the object's last ivar is less aligned than that. Alignment greater than pointer-size is never guaranteed, even if the area following the object's last ivar is more aligned than that.

In a garbage-collected environment, the memory is scanned conservatively.

See Also 参照

Working with Instances インスタンスを扱う

object_copy
Returns a copy of a given object.
object_dispose
Frees the memory occupied by a given object.
object_setInstanceVariable
Changes the value of an instance variable of a class instance.
object_getInstanceVariable
Obtains the value of an instance variable of a class instance.
object_getIvar
Reads the value of an instance variable in an object. あるオブジェクトの中のあるインスタンス変数の値を読み出します。
object_setIvar
Sets the value of an instance variable in an object. あるオブジェクトの中のあるインスタンス変数の値を設定します。
object_getClassName
Returns the class name of a given object. 与えられたオブジェクトのクラス名を返します。
object_getClass
Returns the class of an object. あるオブジェクトのクラスを返します。
object_setClass
Sets the class of an object. あるオブジェクトのクラスを設定します。