day07-02-点语法

Objective-c

//  day07-02-点语法
//
//  Created by Aaron on 15/7/9.
//  Copyright (c) 2015年 Aaron. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Person.h"
//点语法
//.
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *p = [[Person alloc] init];
        //[p setName:@"xiaobai"];
        //oc加入点语法,原始的初衷是为了让程序员更方便的访问属性
        p.name = @"xiaobai";
        //NSLog(@"%@",[p name]);
        NSLog(@"%@",p.name);
        //[p askToOther:p];
        p.askToOther = p;
        //在等号的左边,表示要使用设值方法
        // set+AskToOther
        [p setAskToOther:p];
        //在=右边或者没有=
        //直接调用 age 方法
        NSLog(@"%ld",p.age);
        //OC的点语法是帮我们访问setter getter接口
        //OC的点语法和属性无关
    }
    return 0;
}

#import <Foundation/Foundation.h>
@interface Person : NSObject
{
    NSString *_name;
}
-(void)setName:(NSString *)name;
-(NSString *)name;
-(void)setAskToOther:(Person *)p;
-(NSInteger)age;
@end

#import "Person.h"
@implementation Person
-(void)setName:(NSString *)name
{
    if(_name != name)
    {
        _name = name;
    }
}
-(NSString *)name
{
    return _name;
}
-(void)setAskToOther:(Person *)p
{
    NSLog(@"........");
}
-(NSInteger)age
{
    return 100;
}
@end