IMP擷取函數指標

Tester.h

#import <Foundation/Foundation.h>


@interface Tester : NSObject {

}

-(void) Test:(NSString*) msg;

@end

 

Tester.m

#import "Tester.h"


@implementation Tester

-(void) Test:(NSString*) msg
{
    NSLog(@"%@", msg);

}


@end

main.m

#import <Foundation/Foundation.h>
#import "Tester.h"

int main (int argc, const char * argv[])
{

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    id tester = [[Tester alloc] init];

    SEL testSelector = @selector(Test:); //構造選取器
    IMP testIMP = [tester methodForSelector: testSelector];//擷取函數的指標
    
for(int i=0;i<10;i++)
    {
//int to NSString
//直接使用指標調用對像函數
        testIMP(tester,testSelector, [NSString stringWithFormat:@"%d",i]);
    }


    [pool drain]; 
return 0;
}