Instance Method インスタンスメソッド

methodSignatureForSelector:

Returns an NSMethodSignature object that contains a description of the method identified by a given selector.

Declaration 宣言 

- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector;

Parameters パラメータ

aSelector

A Selector that identifies the method for which to return the implementation address. When the receiver is an instance, aSelector should identify an instance method; when the receiver is a class, it should identify a class method.

Return Value 戻り値

An NSMethodSignature object that contains a description of the method identified by aSelector, or nil if the method can’t be found.

Discussion 解説

This method is used in the implementation of protocols. This method is also used in situations where an NSInvocation object must be created, such as during message forwarding. If your object maintains a delegate or is capable of handling messages that it does not directly implement, you should override this method to return an appropriate method signature.

See Also 参照

Obtaining Information About Methods メソッドについての情報の取得

- methodForSelector:
Locates and returns the address of the receiver’s implementation of a method so it can be called as a function. あるメソッドのこのレシーバの持つ実装の所在（アドレス）を突き止めて返します、それでそれは関数として呼び出し可能です。
+ instanceMethodForSelector:
Locates and returns the address of the implementation of the instance method identified by a given selector. 指定されたセレクタによって識別されるインスタンスメソッドの実装の所在（アドレス）を突き止めて返します。
+ instanceMethodSignatureForSelector:
Returns an NSMethodSignature object that contains a description of the instance method identified by a given selector.

Related Documentation 関連文書

- forwardInvocation:
Overridden by subclasses to forward messages to other objects. これは、メッセージを別のオブジェクトへ転送するためにサブクラスによってオーバーライドされます。