In xcode6, the new project does not have a PCH file by default. Apple must cancel the PCH file. At the beginning, many people may not be comfortable with it. If we want to use the PCH file, you need to add them manually. The steps are as follows: (directly)
@ Reason for cancellation:
One person on stackoverflow explained this as follows:I suspect because of mod
Customize prefix. PCH files in xcode
Luo chaohui (http://www.cnblogs.com/kesalin) This article follows the "signature-non-commercial use-consistency" creation public agreement
The extension PCH indicates the "precompliled Header", that is, the pre-compiled header file. prefix. PCH is the default pre-compiled header file generated by the xcode project. In th
Many times, due to the need for development, we often need to define in the PCH some variables that are used throughout the project, etc.
In general, during the previous development process, we were accustomed to writing a macro directly in the PCH to get it done. But when we carefully analyze Apple's official documents, we will find that some of the variables defined in him are not defined by macros, b
The first step: command+n create a. pch file, the file name can be setStep Two: Add some globally used macros to the PCH and commonly used afnetworking-like three-party librariesStep three: Open the project's building Setting, search the prefix Header$ (srcroot) refers to the project root directory, after the set up will automatically show the path, after compiling you will find that you can be transferred
Note that this blog post is only convenient for later in the Add PCH file configuration when the reference to use, worried about some of the configuration of the path due to time and forgotten.(1) Build a PCH fileNote that the following should be Targets after the(2) Some configuration of the fileSelect the project project file, as shown in the following:(3) Handling of common errorsMost of the introduction
Just get started Xcode6/xcode7, will always find before 6 in the "Use of name-prefix.pch" This file to configure our global use of the header file, but Xcode6 no, they say, this kind of things will sometimes appear 1 some silly questions, In order not to the vast number of procedures ape dozens, as well as my high-end atmosphere on the grade of Apple companies do not want to be scolded all day, simply cancel the automatic generation, need to Zhu er their own to match, easy to use is their own th
IOS8 "Add PCH Global reference file in Xcode6" (2014-11-27 11:13:02) Frontier:Xcode6 removed the PCH, for some trivial header file reference, speed up the compilation speed! Xcode6 the previous version of the build project is automatically added to this:Xcode6 The following version to manually add the steps as follows:1)2) 3) $ (srcroot)/pchfile.pchThat's OK! ------------------------------------------------
1. Select the supporting Files folder under Project and select the PCH file to create a new PCH.2. Here to demonstrate the import afnetworking header file (of course, you have already imported AFN folder in the project)#ifdef __objc__ // is referenced only by the object-c file#import #import "AFNetworking.h"#define CITYDATAURL @"Http://www.hunliji.com/cities.json"//This macro definition of the whole project
IOS xxx. pchInfo. plist and Prefix. pch File Location modification problems and solutions if you want to change Info. plist and Prefix. the actual path of the pch file, that is, the location of the actual file (not the Organization path in the Project). You need to modify the corresponding configuration in Build Settings. Otherwise, the project cannot find the corresponding Info. plist and Prefix.
The previous PCH for iOS was the system's own, and then Apple canceled the PCH, and I've been disgusted with the addition. I don't know if my brain is smoking recently. It was added. Do not like to add, because I want their code sent to others, other people can run anywhere, without changing the wrong warning.Reflection of a bit, because a lot of people are added, online blog also have a variety of how to a
Experience-use const and macro in PCHMost of the time, due to the development needs, we often need to define some variables used in the entire project in pch. In general, in the previous development process, we are all used to writing a macro directly in pch. However, after carefully analyzing the official documents of apple, we will find that some variables defined in it are not defined by macros, but by u
PCH can be used to store shared information, such as the width and height of a device's screen. Version number and so on common informationThe old version of Xcode automatically creates a PCH file for us, and the new version is not created automatically, if you need to create it yourself manuallyConstants can be defined inside after creation is completeHere is an example of screen sizeAs follows------------
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If you decide to add a. pch file manually and do want to use objective-c just like before XCode 6 you'll also has to I Mport UIKit and Foundation frameworks in the. pch file. Otherwise you'll have the to import these frameworks manually in each header file. You can add the following code anyway as it tests for the language used:#ifdef __OBJC__ #import
-----Excerpt from StackOv
Forefront:xcode6 The PCH, for some trivial header file reference, speed up the compilation speed!Code6 the previous version of the build project is automatically added to this:Xcode6 The following version to manually add the steps as follows:1)2) 3) $ (srcroot)/pchfile.pchThat's OK!--------------------------------------------------------------------------------------------------------------- ---You may encounter a problem:/users/apple/documents/mywork
PCH can be used to store shared information, such as the width and height of a device's screen. Version number and so on common informationThe old version of Xcode automatically creates a PCH file for us, and the new version is not created automatically, if you need to create it yourself manuallyConstants can be defined inside after creation is completeHere is an example of screen sizeAs follows------------
PCH can be used to store shared information, such as the width and height of a device's screen. Version and so on common informationThe old version of Xcode will create the PCH file for us on its own initiative, and the new version number is not created on its own initiative. Suppose you need to use the ability to manually createCan define constants in the inside after creationHere is an example of screen s
From: http://www.cppblog.com/silekey/articles/87108.html
Note: Many compilation and link parameters are added to the Framework generated by default by MFC. If we want to customize our own framework, unfamiliar compilation parameters will cause many problems.
Keyword: VC Empty Project custom pre-compilation header. PCHThe pre-compiled header file cannot be opened: "Debug/Xxx. PCH ": no such file or directory
Here is a concept to be explained first:
1>
Generally this happens because the project is copied directly to the other computer to run ...Clang:error:no such file or directory: '/demo2/control Code/13/recorder/recorder_prefix.pch 'Clang:error:no input FilesCommand/developer/platforms/iphonesimulator.platform/developer/usr/bin/clang failed with exit code 1WORKAROUND: In your main project file target search, PCH, find the prefix Header to remove the value behind it, and then re-change to the path
Hello world_prefix.pch: the extension. PCH indicates "precompiled header". This is a list of header files from the external framework used by your project. Xcode will compile these headers to files, which will reduce the time for you to compile the project when you select build or build and go. Usually, the header file is automatically included.
PCH: the system will include this file before compiling every
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