RetainCount2

来源：互联网发布：linux w3m 使用编辑：程序博客网时间：2024/05/29 04:32

新建工程：RetainCount2，修改代码如下：

////  main.m//  RetainCount////  Created by cloud on 13-3-8.//  Copyright (c) 2013年 cloud. All rights reserved.//#import <Foundation/Foundation.h>@interface RetainTracker:NSObject@end@implementation RetainTracker- (id) init{    if(self=[super init])    {        NSLog(@"init: Retain count of %d.",[self retainCount]);    }    return self;}- (void) dealloc{    NSLog(@"dealloc called.Bye Bye.");    [super dealloc];}@endint main(int argc, const char * argv[]){    NSAutoreleasePool *pool;    pool = [[NSAutoreleasePool alloc] init];        RetainTracker* tracker=[RetainTracker new];    //count: 1        [tracker retain];//count 2    [tracker autorelease];    [tracker release];    NSLog(@"releasing pool");    [pool release];                     return 0;}

运行结果如下：

使用释放池的好外时，你可以在任意地方减少引用记数，但它会在清空释放池时，统一发送release消息。