1. 父类Person.h
   
2. #import <Foundation/Foundation.h>
   
3. 
   
4. @interface Person : NSObject
   
5. {
   
6.     NSString *_name;
   
7. }
   
8. 
   
9. 
   
10. @property NSString *name;
    
11. @property int age;
    
12. - (id)initWithName:(NSString *)name andAge:(int)age;
    
13. 
    
14. @end
    
15. 
    
16. Person.m中
    
17. #import "Person.h"
    
18. 
    
19. @implementation Person
    
20. -(id)initWithName:(NSString *)name andAge:(int)age
    
21. {
    
22.     if (self = [super init]) {
    
23.         
    
24.         _name = name;
    
25.         _age = age;
    
26.     }
    
27.     return self;
    
28. }
    
29. @end
    
30. 
    
31. 子类Student.h
    
32. #import "Person.h"
    
33. 
    
34. @interface Student : Person
    
35. @property int no;
    
36. - (id)initWithName:(NSString *)name andAge:(int)age andNo:(int)no;
    
37. 
    
38. @end
    
39. 
    
40. Student.m中
    
41. #import "Student.h"
    
42. 
    
43. @implementation Student
    
44. 
    
45. - (id)initWithName:(NSString *)name andAge:(int)age andNo:(int)no
    
46. {
    
47. if (self = [super initWithName:name andAge:age]) {
    
48.         _no = no;
    
49.     }
    
50.     return self;
    
51. }
    
52. @end
    
53. 
    
54. 主函数main.m中
    
55. #import <Foundation/Foundation.h>
    
56. #import "Person.h"
    
57. #import "Student.h"
    
58. int main(int argc, const char * argv[])
    
59. {
    
60. 
    
61.     @autoreleasepool {
    
62.         Student *s = [[Student alloc] initWithName:@"Jame" andAge:29 andNo:10];
    
63.         
    
64.         NSLog(@"........");
    
65.     }
    
66.     return 0;
    
67. }
    

复制代码

怎么结果是酱紫

不太清楚你那个事怎么回事   但是我复制过来打印的值却是正确的啊//父类Person.h
#import <Foundation/Foundation.h>

@interface Person : NSObject
{
    NSString *_name;
}


@property NSString  * name;
@property int age;
- (id)initWithName: (NSString *)name andAge: (int)age;

@end

//Person.m中
//#import "Person.h"

@implementation   Person
-(id)initWithName: (NSString *)name andAge: (int)age
{
    if (self = [super init]) {

        _name = name;
        _age = age;
    }
    return self;
}
@end

//子类Student.h
//#import "  Person.h  "

@interface Student : Person
@property int no;
- (id)initWithName: (NSString *)name andAge: (int)age andNo: (int)no;

@end

//Student.m中
//#import "Student.h"

@implementation Student

- (id)initWithName: (NSString *)name andAge: (int)age andNo: (int)no
{
    if (self = [super initWithName:name andAge: age]) {
        _no = no;
    }
    return self;
}
@end

//主函数main.m中
//#import <Foundation/Foundation.h>
//#import " Person.h"
//#import "Student.h"
int main(int argc, const char * argv[])
{

    @autoreleasepool {
        Student *s = [[Student alloc] initWithName : @ " Jame "  andAge: 29 andNo: 10];

        NSLog(@"..................");
    }
    return 0;
}
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你是不是添加断点了。。。