OC2_点语法(属性关键字)

//
//  Dog.h
//  OC2_点语法(属性关键字)
//
//  Created by zhangxueming on 15/6/16.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <Foundation/Foundation.h>@interface Dog : NSObject
//属性关键字
//assgin(缺省)直接赋值 //基本类型 代理对象指针//retain 先release 再 retain //除了基本类型 字符串类型 代理对象, 剩下的通常用 retain//copy   先release 再 copy  //字符串对象用copy//atomic(缺省),nonatomic
//原子性的      非原子性的//readwrite(缺省) 展开对应的setter getter方法
//readonly 只展开对应的getter方法//setter getter  修改setter getter方法的方法名
//点语法访问不受影响
//经典访问要使用新的方法名

@property (assign,atomic)NSInteger age;@property (assign, nonatomic, readwrite)float weight;@property (copy,nonatomic)NSString *name;@property (assign,setter=setNewNumber:,getter=getNumber) NSInteger number;@end

//
//  Dog.m
//  OC2_点语法(属性关键字)
//
//  Created by zhangxueming on 15/6/16.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "Dog.h"@implementation Dog@synthesize age = _age;- (NSInteger)age
{NSLog(@"getter");return _age;
}- (void)setAge:(NSInteger)age
{NSLog(@"setter");_age = age;
}@end

//
//  main.m
//  OC2_点语法(属性关键字)
//
//  Created by zhangxueming on 15/6/16.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Dog.h"int main(int argc, const char * argv[]) {@autoreleasepool {Dog *dog = [[Dog alloc] init];dog.name= @"小白";dog.age = 12;dog.weight = 34.5;NSLog(@"name = %@ age = %li weight = %.2f", dog.name, dog.age, dog.weight);dog.number = 100;NSLog(@"number = %li", dog.number);[dog setNewNumber:200];NSLog(@"number = %li", [dog getNumber]);}return 0;
}