OC中结构体作为对象属性

在OC中结构体有时候也作为对象的属性

类的定义

#import <Foundation/Foundation.h>

typedef struct{
    int year;
    int month;
    int day;

} Date;
@interface Student : NSObject
{
    @public
    NSString *_name;
    Date _birthday;
}
-(void) say;
@end

类方法

#import "Student.h"

@implementation Student
-(void) say{
    NSLog(@"name=%@;year=%d,month=%d,day=%d",_name,_birthday.year,_birthday.month,_birthday.day);
}
@end

对象的实例化及方法的实现

#import <Foundation/Foundation.h>
#import "Student.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Student *stu=[[Student alloc] init];
        stu->_name=@"喵星人";
        //方法1
    //    stu->_birthday=(Date){1995,2,15};
        //方法2
//        stu->_birthday.year=1995;
//        stu->_birthday.month=2;
//        stu->_birthday.day=25;
        //方法3
        Date date={1995,2,25};
        stu->_birthday=date;
        [stu say];
    }
    return 0;
}