Objective-c 類 方法聲明 初始化及調用

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////  Student.h//  OOP////  Created by acgity on 16/5/16.//  Copyright © 2016年 acgity. All rights reserved.//#import <Foundation/Foundation.h>typedef enum {    male,female} SEX;@interface Student : NSObject{    @public    NSString *_name;    int _age;    SEX _sex;}+(void)walk;-(void)talk;-(instancetype)init;-(instancetype)initWithName:(NSString *)name withAge:(int)age withSex:(SEX)sex;@end

////  Student.m//  OOP////  Created by acgity on 16/5/16.//  Copyright © 2016年 acgity. All rights reserved.//#import "Student.h"@implementation Student-(instancetype)init{    self = [super init];    if(self != nil){        self -> _name = @"acgity";        self -> _age = 23;        self -> _sex = female;    }    return self;}-(instancetype)initWithName:(NSString *)name withAge:(int)age withSex:(SEX)sex{    self = [super init];    if(self != nil){        self->_name = name;        self->_age = age;        self->_sex = sex;    }    return self;}-(void)talk {    NSString *flag = self->_sex == male ? @"girl" : @"boy";    NSLog(@"Hi,I‘m a %@ named %@ %d years old...",flag,_name,_age);}+(void)walk {    NSLog(@"I‘m walking now...");}@end

////  main.m//  OOP////  Created by acgity on 16/5/16.//  Copyright © 2016年 acgity. All rights reserved.//#import <Foundation/Foundation.h>#import "Student.h"int main(int argc, const char * argv[]) {        Student *df = [[Student alloc] init];    [df talk];    [Student walk];        Student *ini = [[Student alloc] initWithName:@"tony" withAge:32 withSex:male];    [ini talk];    [Student walk];        return 0;}

2016-05-16 18:46:34.287 OOP[3140:120047] Hi,I‘m a boy named acgity 23 years old...

2016-05-16 18:46:34.288 OOP[3140:120047] I‘m walking now...

2016-05-16 18:46:34.288 OOP[3140:120047] Hi,I‘m a girl named tony 32 years old...

2016-05-16 18:46:34.288 OOP[3140:120047] I‘m walking now...

Program ended with exit code: 0

Objective-c 類 方法聲明 初始化及調用