第六讲：setter与getter方法及函数属性

Sian

Dog.h

1. #import <Foundation/Foundation.h>
2. @interface Dog : NSObjec
3. {
4.      int _age;
5. }
6. @property (readwrite) int age;//h文件中申明setter与getter方法
7. - (void) setAge:(int)newAge;
8. - (void) age;
9. @end

复制代码

Dog.m

1. #import "Dog.h"
2. @implementation Dog
3. @systhesize age = _age;//m文件中生成setter与getter方法，变量与函数名相同时亦可写成@synthesize age;
4. - (void) setAge:(int)newAge{
5.      _age = newAge;
6. }
7. - (int)age{
8.      return _age;
9. }
10. @end

复制代码

main.m

1. #import<Foundation/Foundation.h>
2. #import "Dog.h"
3. int main(int argc,const char * argv[])
4. {
5.      Dog * dog = [[Dog alloc] init];
6.      [dog setAge:10];
7.      int dogAge = [dog age];
8.      printf("The dos age is %d",dogAge);
10.      dog.age = 20;
11.      dogAge = dog.age;
12.      printf("The new dog age is %d",dogAge);
14. return 0;
15. }

复制代码