#import <Foundation/Foundation.h>
@interface Human : NSObject {
int age;
NSString *name;
Human *child;
}
@property int age;
@property (copy)NSString *name;
@property (retain)Human *child;
@end
@implementation Human
@synthesize name;
@synthesize age;
@synthesize child;
/*一般情况下，一个自定义类我们在用%@输出的时候，给出的是一个内存地址，
我们在该类的.m文件里重写description方法，来修改输出内容*/
#if 1
-(NSString *)description {
NSString *des = [NSString stringWithFormat:@"->%@,%d,%@",name,age,child];
return des;
}
#endif
@end
int main(int argc, const char * argv[]) {
NSAutoreleasePool *pool =[[NSAutoreleasePool alloc] init];
Human *human1=[[Human alloc]init];
Human *human2=[[Human alloc]init];
human2.name=@"jeck";
human2.age=23;
human1.child=human2;
human1.name=@"holydancer";
human1.age=22;
NSLog(@"%@",human1);
[pool release];
return 0;
}
结果：
2016-12-02 11:46:52.998 test[7289] ->holydancer,22,->jeck,23,(null)
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