OC基础 05-手动内存管理(MRC)

int main(int argc, const char * argv[])
{
    @autoreleasepool {
        int a = 10; // 栈
        int b = 20; // 栈
        // p : 栈
        // Person对象(计数器==1) : 堆
        Person *p = [[Person alloc] init];
    }
    // 经过上一行代码后, 栈里面的变量a\b\c都会被回收
    // 但是堆里面的Person对象还会留在内存中,因为它是计数器依然是1
    return 0;
}

- (void)setRoom:(Room *)room
{
    // 避免过度释放
    if (room != _room)
    {
        // 对当前正在使用的房间（旧房间）做一次release
        [_room release];

        // 对新房间做一次retain操作
         _room = [room retain];
    }
}

- (void)dealloc
{
    // 当人不在了，代表不用房间了
    // 对房间做一次release操作
    [_room release];
    [super dealloc];
}

#import <Foundation/Foundation.h>

typedef struct {
    
    int year;
    int month;
    int day;
    int hour;
    int minute;
    int second;
} MyDate;
@interface Account : NSObject
// 账号名称
@property(nonatomic, retain)NSString *eaml;
// 账号密码
@property(nonatomic, retain)NSString *pwd;
// 账号注册时间
@property(nonatomic, assign)MyDate registerTime;
@end

#import "Account.h"

@implementation Account

- (void)dealloc {
    
    NSLog(@"%s", __func__);
    self.eaml = nil;
    self.pwd = nil;
    [super dealloc];
}
@end

#import <Foundation/Foundation.h>
#import "Account.h"

@interface Author : NSObject
// 昵称
@property(nonatomic, retain)NSString *name;
// 头像
@property(nonatomic, retain)NSString *icon;
// 生日
@property(nonatomic, assign)MyDate birthday;
// 账号
@property(nonatomic, retain)Account *account;
@end

#import "Author.h"

@implementation Author
- (NSString *)description {
    
    return [NSString stringWithFormat:@"\n作者:%@\n", _name];
}
- (void)dealloc {
    
    NSLog(@"%s", __func__);

    self.name = nil;
    self.icon = nil;
    self.account = nil;
    [super dealloc];
}
@end

#import <Foundation/Foundation.h>
#import "Author.h"

@interface Status : NSObject

// 文字内容
@property(nonatomic, retain)NSString *text;
// 配图
@property(nonatomic, retain)NSString *picture;
// 发表时间
@property(nonatomic, assign)MyDate createTime;
// 作者
@property(nonatomic, retain)Author *author;
// 转发的微博
@property(nonatomic, retain)Status *repostStatus;
// 评论数
@property(nonatomic, assign)int commentCount;
// 转发数
@property(nonatomic, assign)int retweetCount;
// 赞数
@property(nonatomic, assign)int likeCount;
@end

#import "Status.h"

@implementation Status

- (NSString *)description {
    
    return [NSString stringWithFormat:@"\n微博内容:%@\n发表时间:%d-%d-%d-%d-%d-%d\n评论:%d 转发:%d 点赞:%d",_text,  _createTime.year, _createTime.month, _createTime.day, _createTime.hour, _createTime.minute, _createTime.second, _commentCount, _retweetCount, _likeCount];
}

- (void)dealloc {
    
    NSLog(@"%s", __func__);
    
    self.text = nil;
    self.picture = nil;
    self.repostStatus = nil;
    self.author = nil;
    [super dealloc];
}
@end

#import <Foundation/Foundation.h>
#import "Status.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
       // 老王
        // 1.创建账号
        Account *lwAccount = [[Account alloc] init];
        lwAccount.eaml = @"xiaomage@520it.com";
        lwAccount.pwd = @"haomage";
        lwAccount.registerTime = (MyDate){2010, 1, 1, 17, 56, 34};
        
        // 2.创建作者
        Author *lwAuthor = [[Author alloc] init];
        lwAuthor.name = @"老王";
        lwAuthor.icon = @"lw.png";
        lwAuthor.birthday = (MyDate){1986, 3, 8, 18, 18, 18};
        lwAuthor.account = lwAccount;
        
        // 3.发微博
        Status *lwStatus = [[Status alloc] init];
        lwStatus.text = @"爆米花手机比逼格更有逼格";
        lwStatus.picture = @"phone.png";
        lwStatus.createTime = (MyDate){2015, 6, 20, 10, 23, 23};
        lwStatus.author = lwAuthor;
        lwStatus.repostStatus = nil;
        lwStatus.commentCount = 100;
        lwStatus.retweetCount = 90;
        lwStatus.likeCount = 200;
        
        
        // 王大锤
        Account *wdcAccount = [[Account alloc] init];
        wdcAccount.eaml = @"dachuimeimei@520it.com";
        wdcAccount.pwd = @"654321";
        wdcAccount.registerTime = (MyDate){2012, 8, 8, 19, 26, 54};
        
        Author *wdcAuthor = [[Author alloc] init];
        wdcAuthor.name = @"王大锤";
        wdcAuthor.icon = @"wdc.png";
        wdcAuthor.birthday = (MyDate){1989, 9, 6, 14, 16, 28};
        wdcAuthor.account = wdcAccount;
        
        Status *wdcStatus = [[Status alloc] init];
        wdcStatus.text = @"真的很有逼格";
        lwStatus.picture = nil;
        wdcStatus.createTime = (MyDate){2015, 6, 21, 20, 47, 9};
        wdcStatus.author = lwAuthor;
        wdcStatus.repostStatus = lwStatus;
        wdcStatus.commentCount = 0;
        wdcStatus.retweetCount = 0;
        wdcStatus.likeCount = 0;
        
    
        NSLog(@"%@%@", lwStatus, lwAuthor);
       
        [lwAccount release];
        [lwAuthor release];
        [lwStatus release];
        
        [wdcAccount release];
        [wdcAuthor release];
        [wdcStatus release];
    }
    return 0;
}