OC3_dealloc

//

//  Dog.h

//  OC3_dealloc

//

//  Created by zhangxueming on 15/6/18.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>



@interface Dog : NSObject



@end







//

//  Dog.m

//  OC3_dealloc

//

//  Created by zhangxueming on 15/6/18.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "Dog.h"



@implementation Dog



- (void)dealloc

{

    NSLog(@"dog release!!!");

    [super dealloc];

}



@end

//

//  main.m

//  OC3_dealloc

//

//  Created by zhangxueming on 15/6/18.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>

#import "Dog.h"



int main(int argc, const char * argv[]) {

    @autoreleasepool {

        Dog *xiaoHei = [[Dog alloc] init];

        Dog *xiaoBai = [xiaoHei retain];

        NSLog(@"retainCount = %li", xiaoBai.retainCount);

        Dog *xiaoHui = [xiaoHei retain];

        NSLog(@"retainCount = %li", xiaoHui.retainCount);

        [xiaoHei release];

        NSLog(@"retainCount = %li", xiaoBai.retainCount);

        [xiaoBai release];

        NSLog(@"retainCount = %li", xiaoHui.retainCount);

        

        //最后一次release 的时候,retainCount理论值为的0, 自动调用dealloc方法释放对象

        [xiaoHui release];

        

        

        

    }

    return 0;

}