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 

func object_getIndexedIvars(_ obj: Any?) -> UnsafeMutableRawPointer?

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

func object_getIvar(Any?, Ivar) -> Any?
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。
func object_setIvar(Any?, Ivar, Any?)
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。
func object_getClassName(Any?) -> UnsafePointer<CChar>
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。
func object_getClass(Any?) -> AnyClass?
Returns the class of an object. あるオブジェクトのクラスを返します。
func object_setClass(Any?, AnyClass) -> AnyClass?
Sets the class of an object. あるオブジェクトのクラスを設定します。