간단한 예제..
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| #import <foundation/foundation.h> | |
| int main(int argc, const char * argv[]) | |
| { | |
| @autoreleasepool { | |
| NSString *prose = @"Do nine men interpret?"; | |
| NSMethodSignature *signature; | |
| NSInvocation *invocation; | |
| NSString *count; | |
| signature = [prose methodSignatureForSelector:@selector(substringWithRange:)]; | |
| invocation = [NSInvocation invocationWithMethodSignature:signature]; | |
| [invocation setSelector:@selector(substringWithRange:)]; | |
| NSRange range = NSMakeRange(3,4); | |
| [invocation setArgument:&range atIndex:2]; | |
| [invocation invokeWithTarget:prose]; | |
| [invocation getReturnValue:&count]; | |
| NSLog(@"%@ men, I nod.", count); | |
| } | |
| return 0; | |
| } |
NSMethodSignature의 객체를 생성 할 때 셀렉터를 지정하는데 NSInvocation의 객체를 생성 할 때도
셀렉터를 set해줘야 함... signature는 특정 셀렉터와 연결되는 것이 아니라 구성의 정보만 가지고 있는 상태라
그렇다고 함....