//

 //  main.m

 //  04-@property参数

 //

 //  Created by apple on 13-8-9.

 //  Copyright (c) 2013年 itcast. All rights reserved.

 //

 #import <Foundation/Foundation.h>

 @interface Book : NSObject

 @end

 #import "Book.h"

 @implementation Book

 @end

 #import <Foundation/Foundation.h>

 #import "Book.h"

 @interface Person : NSObject

 @property int age;

 // retain : 生成的set方法里面，release旧值，retain新值

 @property (retain) Book *book;

 @property (retain) NSString *name;

 @end

 #import "Person.h"

 @implementation Person

 //- (void)setBook:(Book *)book

 //{

 //    if (_book != book)

 //    {

 //        [_book release];

 //

 //        _book = [book retain];

 //    }

 //}

 - (void)dealloc

 {

     [_book release];

     [_name release];

     [super dealloc];

 }

 @end

 #import <Foundation/Foundation.h>

 #import "Book.h"

 @interface Student : NSObject

 @property (retain) Book *book;

 @property (retain) NSString *name;

 @end

 #import "Student.h"

 @implementation Student

 - (void)dealloc

 {

     [_book release];

     [_name release];

     [super dealloc];

 }

 @end

 #import <Foundation/Foundation.h>

 #import "Person.h"

 #import "Book.h"

 int main()

 {

     Book *b = [[Book alloc] init];

     Person *p = [[Person alloc] init];

     p.book = b;

     NSLog(@"%ld", [b retainCount]);

     [p release];

     [b release];

     return ;

 }

 //

 //  main.m

 //  05-@property参数

 //

 //  Created by apple on 13-8-9.

 //  Copyright (c) 2013年 itcast. All rights reserved.

 //

 #import <Foundation/Foundation.h>

 /*

  1.set方法内存管理相关的参数

  * retain : release旧值，retain新值（适用于OC对象类型）

  * assign : 直接赋值（默认，适用于非OC对象类型）

  * copy   : release旧值，copy新值

  2.是否要生成set方法

  * readwrite : 同时生成setter和getter的声明、实现(默认)

  * readonly  : 只会生成getter的声明、实现

  3.多线程管理

  * nonatomic : 性能高 (一般就用这个)

  * atomic    : 性能低（默认）

  4.setter和getter方法的名称

  * setter : 决定了set方法的名称，一定要有个冒号 :

  * getter : 决定了get方法的名称(一般用在BOOL类型)

  */

 @interface Person : NSObject

 // 返回BOOL类型的方法名一般以is开头

 @property (getter = isRich) BOOL rich;

 //

 @property (nonatomic, assign, readwrite) int weight;

 // setWeight:

 // weight

 //

 @property (readwrite, assign) int height;

 @property (nonatomic, assign) int age;

 @property (retain) NSString *name;

 @end

 #import "Person.h"

 @implementation Person

 @end

 #import <Foundation/Foundation.h>

 #import "Person.h"

 int main()

 {

     Person *p = [[Person alloc] init];

     p.rich = YES;

     BOOL b = p.isRich;

     return ;

 }