错误原因:
exc_bad_access(code=1, address=0x789870)野指针错误,主要的原因是,当某个对象被完全释放,也就是retainCount,引用计数为0后。再去通过该对象去调用其它的方法就会出现野指针错误。
例如:
Person *jerry = [[Person alloc]init]; // retainCount引用计数为1
[jerry eat];...
分类:
移动开发 时间:
2014-07-22 23:05:16
阅读次数:
372
Agri-Net
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 36780
Accepted: 14825
Description
Farmer John has been elected mayor of his town! One of his campa...
分类:
其他好文 时间:
2014-07-22 23:04:15
阅读次数:
229
从Vista开始,想阻止系统关机就开始变麻烦了,不能只拦截WM_QUERYENDSESSION了,操作系统只给一个应用程序两秒钟的时间去保存自己的东西,两秒钟之后,不管做完了没有,Game Over!可是如果你正在刻录一张光盘呢?两秒钟是都不够的,所以Vista之后也给提供了一种方式阻止系统关机,就是ShutdownBlockReasonCreate函数,只要调用这个函数,第一个参数传递创建主窗口...
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Strategic game
Time Limit: 2000MS
Memory Limit: 10000K
Total Submissions: 6105
Accepted: 2808
Description
Bob enjoys playing computer games, especially st...
分类:
其他好文 时间:
2014-07-22 23:01:55
阅读次数:
304
Little Vasya has received a young builder’s kit. The kit consists of several wooden bars, the lengths of all of them are known. The bars can be put one on the top of the other if their lengths are the...
分类:
其他好文 时间:
2014-07-22 23:01:53
阅读次数:
323
Say you have an array for which theithelement
is the price of a given stock on dayi.If you were only permitted to complete at
most one transaction (ie...
分类:
其他好文 时间:
2014-05-02 00:37:20
阅读次数:
349
各位勇敢者要玩的第一个游戏是什么呢?很简单,它是这样定义的:
1、 本游戏是一个二人游戏;
2、 有一堆石子一共有n个;
3、 两人轮流进行;
4、 每走一步可以取走1…m个石子;
5、 最先取光石子的一方为胜;
如果游戏的双方使用的都是最优策略,请输出哪个人能赢。...
分类:
其他好文 时间:
2014-04-30 22:44:39
阅读次数:
282
kiki's game
Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 40000/1000 K (Java/Others)
Total Submission(s): 5982 Accepted Submission(s): 3552
Problem Description
Recently kiki h...
分类:
其他好文 时间:
2014-04-30 22:35:38
阅读次数:
258
Crossing River
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 10212
Accepted: 3855
Description
A group of N people wishes to go across a river with only one...
分类:
其他好文 时间:
2014-04-30 22:21:38
阅读次数:
212
1 JavaScript中对象
javaScript中所有的事物都是对象,对象时指带有属性和方法的
对象的创建
定义并创建对象的实例,然后给对象添加属性
person=new Object();
person.firstname="Bill";
person.lastname="Gates";
隐式创建
person={firstname:"John",lastname:"Doe"...
分类:
编程语言 时间:
2014-04-30 22:14:38
阅读次数:
258