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Foundation

Foundation类层次的根是NSObject类,它(和NSObject及NSCopying协议一起)定义了基本的对象属性和行为。Foundation框架的剩余部分由几组相互关联的类和一些独立的类组成。有一些代表基本数据类型的类,如字符串、字节数组、用于存储其它对象的集合类;一些代表系统信息的类,如日期类;还有一些代表系统实体的类,比如端口、线程、和进程。图1、图2、和图3所示的类层次描述了这些类的逻辑分组及其继承关系。
  • 本教程举例说明了如何使用 ADO 编程模型对数据源进行查询及更新。教程首先讲述了完成此项任务的必要步骤

    本教程举例说明了如何使用 ADO 编程模型对数据源进行查询及更新。教程首先讲述了完成此项任务的必要步骤,然后分别通过 Microsoft® Visual Basic、以 VC++ Extensions 为特征的 Microsoft® Visual C++、Microsoft® Visual Basic® 、Scripting Edition 和以 ADO for Windows Foundation Classes (ADO/WFC) 为特征的 Microsoft® Visual J++® 进行更为具体的说明。

    标签: ADO 教程 举例 如何使用

    上传时间: 2015-10-13

    上传用户:330402686

  • C++ Template Metaprogramming sheds light on the most powerful idioms of today s C++, at long last de

    C++ Template Metaprogramming sheds light on the most powerful idioms of today s C++, at long last delivering practical metaprogramming tools and techniques into the hands of the everyday programmer. A metaprogram is a program that generates or manipulates program code. Ever since generic programming was introduced to C++, programmers have discovered myriad "template tricks" for manipulating programs as they are compiled, effectively eliminating the barrier between program and metaprogram. While excitement among C++ experts about these capabilities has reached the community at large, their practical application remains out of reach for most programmers. This book explains what metaprogramming is and how it is best used. It provides the Foundation you ll need to use the template metaprogramming effectively in your own work.

    标签: Metaprogramming Template powerful idioms

    上传时间: 2013-11-30

    上传用户:aix008

  • 《Debugging with GDB--The GNU Source-Level Debugger》 9th Edition 2004 By Richard Stallman,Roland P

    《Debugging with GDB--The GNU Source-Level Debugger》 9th Edition 2004 By Richard Stallman,Roland Pesch,Stan Shebs Free Software Foundation

    标签: Source-Level Debugging Debugger Stallman

    上传时间: 2015-11-10

    上传用户:lo25643

  • 学生信息管理系统 GNU通用公共许可证 第二版

    学生信息管理系统 GNU通用公共许可证 第二版,1991年 版权所有(C)1989,1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA02139, USA 允许每个人复制和发布这一许可证原始文档的副本,但绝对不允许对它进行任何修改。 序言 大多数软件许可证决意剥夺你的共享和修改软件的自由。对比之下,GNU通用公共许可证力图保证你的共享和修改自由软件的自由。——保证自由软件对所有用户是自由的。GPL适用于大多数自由软件基金会的软件,以及由使用这些软件而承担义务的作者所开发的软件。(自由软件基金会的其他一些软件受GNU库通用许可证的保护)。你也可以将它用到你的程序中。 当我们谈到自由软件(free software)时,我们指的是自由而不是价格。我们的GNU通用公共许可证决意保证你有发布自由软件的自由(如果你愿意,你可以对此项服务收取一定的费用);保证你能收到源程序或者在你需要时能得到它;保证你能修改软件或将它的一部分用于新的自由软件;而且还保证你知道你能做这些事情。 为了保护你的权利,我们需要作出规定:禁止任何人不承认你的权利,或者要求你放弃这些权利。如果你修改了自由软件或者发布了软件的副本,这些规定就转化为你的责任。 例如

    标签: GNU 信息管理系统 许可证

    上传时间: 2013-12-22

    上传用户:zuozuo1215

  • The application wizard has created this UCMSGIP application for you. This application not only dem

    The application wizard has created this UCMSGIP application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application.

    标签: application UCMSGIP created wizard

    上传时间: 2015-12-08

    上传用户:小草123

  • This program is free software you can redistribute it and/or modify it under the terms of the GNU

    This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2 of the License, or (at your option) any later version.

    标签: redistribute the software program

    上传时间: 2014-11-30

    上传用户:大三三

  • Base64算法

    Base64算法,This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application

    标签: Base 64 算法

    上传时间: 2015-12-22

    上传用户:wangyi39

  • 股票源码The application wizard has created this SCDemo application for you. This application not only

    股票源码The application wizard has created this SCDemo application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application.

    标签: application created SCDemo wizard

    上传时间: 2016-01-08

    上传用户:chenjjer

  • Executing a DTS package is very simple, in its simplest form the execution contains for 3 steps. The

    Executing a DTS package is very simple, in its simplest form the execution contains for 3 steps. These 3 steps form the Foundation for all more complicated forms for package execution.

    标签: Executing execution contains simplest

    上传时间: 2016-01-25

    上传用户:zhengzg

  • KEPware Automation DLL installation instructions: To use the KEPware Automation DLL in your Visua

    KEPware Automation DLL installation instructions: To use the KEPware Automation DLL in your Visual Basic project: 1) In the VB IDE, Select "Project/References". 2) If you have been using another vender s automation dll, uncheck it. For example, uncheck "OPC Automation 2.0" for the OPC Foundation s automation dll. 3) Check "KEPware OPC Automation 2.0". 4) Recompile your VB project. If you have been using the OPC Fondation s automation dll, you should not need to make any changes to the VB source code.

    标签: Automation KEPware installation instructions

    上传时间: 2013-12-28

    上传用户:电子世界