Xcode如何使用万能头文件

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本教程属于超懒狗的 不用敲命令行 直接写文件

第一步

到/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr这个路径下

问：Xcode下面还有文件？！(也有可能没人问)
答：在访达右键Xcode，选择显示包内容，就可以了！

第二步

给自己写文件的权限
在usr这个文件夹里找到include文件夹，右键，点击显示简介，找到下面的共享与权限，点击锁解锁，找到自己**(后面写着"(本机)")的**，把后面的权限点一下，选择**“读与写”**，锁上锁（如果会让你输入密码就输）

第三步

点开include文件夹
新建叫bits的文件夹
按照第二步再给自己bits文件夹权限
进入bits文件夹
新建txt文件，叫stdc++.txt
将下面内容 写 复制进去

// C++ includes used for precompiling -*- C++ -*-// Copyright (C) 2003-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library 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 3, or (at your option)
// any later version.// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// ./** @file stdc++.h*  This is an implementation file for a precompiled header.*/// 17.4.1.2 Headers// C
#ifndef _GLIBCXX_NO_ASSERT
#include 
#endif
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include #if __cplusplus >= 201103L
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#endif// C++
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include #if __cplusplus >= 201103L
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#endif

然后将扩展名改成.h

现在就完成啦！

打开Xcode就可以使用

#include

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