https://blog.youkuaiyun.com/wxtsmartzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/wxtsmart/article/details/136631870https://blog.youkuaiyun.com/wxtsmart/article/details/136631870wxtsmartMon, 11 Mar 2024 18:45:29 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/7824211https://blog.youkuaiyun.com/wxtsmart/article/details/7824211wxtsmartThu, 02 Aug 2012 18:26:08 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6870528https://blog.youkuaiyun.com/wxtsmart/article/details/6870528wxtsmartThu, 13 Oct 2011 16:18:59 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6863793https://blog.youkuaiyun.com/wxtsmart/article/details/6863793wxtsmartTue, 11 Oct 2011 19:19:54 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6863584https://blog.youkuaiyun.com/wxtsmart/article/details/6863584wxtsmartTue, 11 Oct 2011 17:42:17 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6774779https://blog.youkuaiyun.com/wxtsmart/article/details/6774779wxtsmartWed, 14 Sep 2011 15:43:28 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6671903https://blog.youkuaiyun.com/wxtsmart/article/details/6671903wxtsmartTue, 09 Aug 2011 11:39:05 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6655474https://blog.youkuaiyun.com/wxtsmart/article/details/6655474wxtsmartTue, 02 Aug 2011 23:57:41 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6598081https://blog.youkuaiyun.com/wxtsmart/article/details/6598081wxtsmartMon, 11 Jul 2011 16:52:20 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6527668https://blog.youkuaiyun.com/wxtsmart/article/details/6527668wxtsmartMon, 06 Jun 2011 10:23:00 +0800 Normal 0 fals]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6434115https://blog.youkuaiyun.com/wxtsmart/article/details/6434115wxtsmartFri, 20 May 2011 11:56:00 +0800 
1.object-c怎么实现多态
　　答：多态是在runtime里面实现的，在编译的时候，compiler把所有class的定义都存放在class 实例对象里面，class实例对象包含了class的父class 实例对象的地址，class方法的select id和地址， class变量的偏移等。所有new出来的object都是从NSObject继承过来的，所以所有对象都自动包含了一个isa的指针，这个指针在调用alloc为object分配地址的时候被指向class对象的地]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6395910https://blog.youkuaiyun.com/wxtsmart/article/details/6395910wxtsmartThu, 05 May 2011 10:33:00 +0800如果要弹出一个自定义的window，可以创建一个新的window xib文件，并通过NSBundle来加载。xib的window属性有一个选项，就是visible at lauch，如果勾选的，执行下面代码时：

    [NSBundleloadNibNamed: @"RegisterWindow"owner: self];

    [NSAppbeginSheet: sheet
  modalForWindow: window
]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6388719https://blog.youkuaiyun.com/wxtsmart/article/details/6388719wxtsmartTue, 03 May 2011 22:26:00 +0800MD5还广泛用于操作系统的登陆认证上，如Unix、各类BSD系统登录密码、数字签名等诸多方。如在UNIX系统中用户的密码是以MD5（或其它类似的算法）经Hash运算后存储在文件系统中。当用户登录的时候，系统把用户输入的密码进行MD5 Hash运算，然后再去和保存在文件系统中的MD5值进行比较，进而确定输入的密码是否正确。通过这样的步骤，系统在并不知道用户密码的明码的情况下就可以确定用户登录系统的合法性。这可以避免用户的密码被具有系统管理员权限的用户知道。MD5将任意长度的“字节串”映射为一个12]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6370211https://blog.youkuaiyun.com/wxtsmart/article/details/6370211wxtsmartThu, 28 Apr 2011 17:38:00 +0800Override this method in a subclass to allow instances to respond to click-through. This allows the user to click on a view in an inactive window, activating the view with one click, instead of clicking first to make the window active and then clickin]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6370124https://blog.youkuaiyun.com/wxtsmart/article/details/6370124wxtsmartThu, 28 Apr 2011 17:11:00 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6369111https://blog.youkuaiyun.com/wxtsmart/article/details/6369111wxtsmartThu, 28 Apr 2011 11:18:00 +0800在给NSPasteboard增加数据的时候，一定要先调用clearContents来清除之前的数据，否则原来的数据会给当前的数据造成影响。]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6345802https://blog.youkuaiyun.com/wxtsmart/article/details/6345802wxtsmartSat, 23 Apr 2011 12:55:00 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6327765https://blog.youkuaiyun.com/wxtsmart/article/details/6327765wxtsmartSat, 16 Apr 2011 15:19:00 +0800https://blog.youkuaiyun.com/wxtsmart/article/details/6321893https://blog.youkuaiyun.com/wxtsmart/article/details/6321893wxtsmartWed, 13 Apr 2011 23:26:00 +0800最近实践发现把太多东西直接绘制到同一个view中不如拆分用subview来处理，也可以将一个类细分。]]>https://blog.youkuaiyun.com/wxtsmart/article/details/6314095https://blog.youkuaiyun.com/wxtsmart/article/details/6314095wxtsmartSun, 10 Apr 2011 21:15:00 +0800最近使用QuickTime，发现直接通过创建一个线程来调用QuickTime的函数会报线程相关的错误，网上查找了一下，QuickTime必须在主线程初始化过才能在别的线程调用，否则会出错，调用[QTMovie class]就可以达到初始化。]]>