题目要求:

             定义一个Person的类,并包含姓名,年龄,身高,体重,性别,设定并打印出年龄的值.

一.传统setter方法和getter方法

1. //注:为使使代码在一块清晰可见,我将.h和.m中的代码都放在main.m文件中
   
2. 
   
3. #import <Foundation/Foundation.h>
   
4. 
   
5. //声明实例变量
   
6. @interface Person : NSObject
   
7. {
   
8.     NSString *_name;
   
9.     int _age;
   
10.     float _height;
    
11.     float _weight;
    
12.     int _sex;
    
13. }
    
14. 
    
15. //set方法和get方法的声明
    
16. -(void)setName:(NSString *) name;
    
17. -(NSString *)name;
    
18. 
    
19. -(void)setAge:(int)age;
    
20. -(int)age;
    
21. 
    
22. -(void)setHeight:(float)height;
    
23. -(float)height;
    
24. 
    
25. -(void)setWeight:(float)weight;
    
26. -(float)weight;
    
27. 
    
28. -(void)setSex:(int)sex;
    
29. -(int)sex;
    
30. 
    
31. @end
    
32. 
    
33. 
    
34. 
    
35. #import "Person.h"
    
36. 
    
37. //set方法和get方法的实现
    
38. @implementation Person
    
39. -(void)setName:(NSString *) name{
    
40.    
    
41.     _name = name;
    
42.    
    
43. }
    
44. -(NSString *)name{
    
45.    
    
46.    
    
47.     return _name;
    
48. }
    
49. 
    
50. -(void)setAge:(int)age{
    
51.    
    
52.     _age = age;
    
53.    
    
54. }
    
55. -(int)age{
    
56.    
    
57.     return _age;
    
58.    
    
59. }
    
60. 
    
61. -(void)setHeight:(float)height{
    
62.    
    
63.    
    
64.     _height = height;
    
65. }
    
66. -(float)height{
    
67.    
    
68.     return _height;
    
69. }
    
70. 
    
71. -(void)setWeight:(float)weight{
    
72.    
    
73.     _weight= weight;
    
74.    
    
75. }
    
76. -(float)weight{
    
77.    
    
78.     return _weight;
    
79.    
    
80. }
    
81. 
    
82. -(void)setSex:(int)sex{
    
83.    
    
84.     _sex = sex;
    
85.    
    
86. }
    
87. -(int)sex{
    
88.    
    
89.    
    
90.     return _sex;
    
91. }
    
92. 
    
93. @end
    
94. 
    
95. 
    
96. 
    
97. 
    
98. #import <Foundation/Foundation.h>
    
99. #import "Person.h"
    
100. int main(int argc, const char * argv[]) {
     
101.     @autoreleasepool {
     
102.         
     
103.         Person *p = [Person new];
     
104.         
     
105.         //为实例变量赋值并打印
     
106.         [p setAge:18];
     
107.         NSLog(@"age = %d",[p age]);
     
108.         
     
109.     }
     
110.     return 0;
     
111. }
     

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二.@property 增强型的使用

1. //注:为使使代码在一块清晰可见,我将.h和.m中的代码都放在main.m文件中
   
2. 
   
3. #import <Foundation/Foundation.h>
   
4. 
   
5. 
   
6. @interface Person : NSObject
   
7. 
   
8. //通过@property增强型来实现set方法和get方法的声明和实现
   
9. @property NSString* name;
   
10. 
    
11. @property int age,sex;
    
12. 
    
13. @property float height,weight;
    
14. 
    
15. @end
    
16. 
    
17. 
    
18. #import "Person.h"
    
19. 
    
20. @implementation Person
    
21. @end
    
22. 
    
23. 
    
24. 
    
25. #import <Foundation/Foundation.h>
    
26. #import "Person.h"
    
27. int main(int argc, const char * argv[]) {
    
28.     @autoreleasepool {
    
29.         
    
30.         Person *p = [Person new];
    
31.         
    
32.         //通过点语法为实例变量赋值并打印
    
33.         p.age = 18;
    
34.         NSLog(@"age = %d",p.age);
    
35.         
    
36.     }
    
37.     return 0;
    
38. }
    

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