NSObject中的performSelector用法簡介

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- (id)performSelector:(SEL)aSelector
Description [說明]	Sends a specified message to the receiver and returns the result of the message. (required) [發送指定訊息的接收和返回訊息的結果。（必填)]
	The performSelector: method is equivalent to sending an aSelector message directly to the receiver. For example, all three of the following messages do the same thing: [該performSelector：方法等效於直接發送aSelector訊息發送到接收器。舉例來說，所有這三個以下訊息做同樣的事情：]   id myClone = [anObject copy]; id myClone = [anObject performSelector:@selector(copy)]; id myClone = [anObject performSelector:sel_getUid("copy")];   However, the performSelector: method allows you to send messages that aren’t determined until runtime. A variable selector can be passed as the argument: [然而，performSelector：方法允許你發送那些沒有確定，直到運行時的訊息。變數選取器可作為參數傳遞：]   SEL myMethod = findTheAppropriateSelectorForTheCurrentSituation();  [anObject performSelector:myMethod];   The aSelector argument should identify a method that takes no arguments. For methods that return anything other than an object, use NSInvocation. [該aSelector參數應該找出一種方法，它沒有參數。對於返回以外的任何一個對象的方法，使用NSInvocation。]
Parameters [參數]	aSelector A selector identifying the message to send. If aSelector is NULL, an NSInvalidArgumentException is raised. [選取器確定要發送的訊息。如果aSelector為NULL，一個NSInvalidArgumentException提高。]
Returns [返回]	An object that is the result of the message. [一個對象，該對象是訊息的結果。]
Availability [可用性]	OS X (10.0 and later) [OS X 10.0及更高版本]
Declared In [宣稱]	NSObject.h
Reference [參考]	NSObject Protocol Reference [參考NSObject協議]

NSObject中的performSelector用法簡介