Objective-c 子类重写方法调用[super method]小实验

#import <Foundation/Foundation.h>

@interface father : NSObject
{
    int num;
}
-(void)setNum:(int)num;

@end

#import "father.h"

@implementation father
-(void)setNum:(int)c
{
    num = c;
    NSLog(@"i am father");
}
@end

#import <Foundation/Foundation.h>
#import "father.h"
@interface son : father

-(void)setNum:(int)num;
@end

#import "son.h"

@implementation son
-(void)setNum:(int)c
{
    num = c;
    if (1 == num) {
        NSLog(@"i am son");
    }
    [super setNum:c];//这里是关键
    
}
@end

#import <Foundation/Foundation.h>
#import "son.h"
int main(int argc, const char * argv[])
{
    @autoreleasepool {
        son *ii = [[son alloc]init];
        [ii setNum:1];
    }
    return 0;
}

2014-08-06 11:00:35.731 testtest[13606:303] i am son
2014-08-06 11:00:35.732 testtest[13606:303] i am father