pch wiki

In the development process, we often use a lot of addresses, or the size of the screen, so we have to use these strings frequently, of course, we can set these strings as macros but the macro can only be accessed in this file, then we can set the global access to the file, We can add a file for a. pch1, first we create a class with the usual steps to create the same2. We have to make some adjustments after the creation.Find this place in the file, and then we double-click the hint in the picture

The project's supporting files folder has a "project name-prefix.pch" file, which is also a header fileThe contents of the PCH header file can be shared and accessed by all other source files in the projectIn general, some global macros are defined in the PCH fileAdd the following preprocessing directives in the PCH file, and then use the log (...) in your projec

Because the project uses the PCH file link macro variable, so a little research on how to use, define macro variable is not appropriate, static const is the most suitablePCH file heard is the ancient century exist files, mainly used for the global precompiled file Unified in an export, convenient programming management, but also often lead to pre-compilation time is too long, but the pre-compilation as long as the set appropriate, actually did not inc

1,command+n, open the new File window: ios->other->pch file, create a PCH document: "Project name-prefix.pch":2, add the path to the precompile header option in building setting "$ (srcroot)/project name/PCH filename" (For example: $ (srcroot)/lotteryfive/ LOTTERYFIVE-PREFIX.PCH)Yes, compile the program, if you have an error check the path you added is correct.3,

10. Use Xcode6 to configure the. pch file for iOS programming, People who have just started Xcode6 will always find that they used to "Application name-Prefix" before "6. the pch file is used to configure the header files we need globally, but xcode6 is gone. People say that this kind of stuff sometimes has some inexplicable problems. In order to avoid the abuse of many programmers, in addition, apple comp

--to Xcode7 can solve this problem. Test.Find a good thing. This is the. pch file. My understanding is that he has stored the header files that we need in each controller, which eliminates the problem of importing the header files of different resources (such as third-party libraries) in different viewcontroller.First, on the Internet, we need to create such a. pch file in Xcode6. Steps:Project right--New F

New company, took over the project even PCH files are not, each need to use the screen when the width of the high, are now written. Now that I've met you, just say the PCH thing.1.command+n, open the new File window: ios->other->pch file, create a PCH document;2. Search for the Prefix header in building setting and cha

Just get started Xcode6 people, will always find before 6 in the "Application name-prefix.pch" This file to configure our global use of the header file, but Xcode6 no, they say, this thing sometimes will appear some inexplicable problems, in order to avoid the vast number of procedural ape dozens , as well as my high-end atmosphere on the grade of the Apple company 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 o

increased each time a new version is posted to the App StoreMain Storyboard file base name (nsmainstoryboardfile)-the name of the primary storyboardBundle identifier (cfbundleidentifier)-Unique identification of the project, deployed to the real machinePCH fileThe project's supporting files folder has a "project name-prefix.pch" file, which is also a header fileThe contents of the PCH header file can be shared and accessed by all other source files i

The contents of the PCH header file can be shared and accessed by all other source files in the project • Generally define some global macros in the PCH file • Add the following preprocessing directives to the PCH file and then use the log (...) in the project. To output the log information, the NSLog statement can be removed at once when the application is publi

Reference: http://blog.csdn.net/lwjok2007/article/details/46385595http://www.tuicool.com/articles/beURbehttp:// blog.csdn.net/gjt19910817/article/details/7200702 function: Write some common header files and macro definitions inside, just like a global variable, you can access the information inside the precompiled file in the required file. : Precompiled header file greatly increase the time of build, no precompiled header file, it is necessary to manually pour the @import manually into the head

PCH files store some shared data, which can be used directly in other files, thus reducing program input, such as storing macro definitions1. Create a new PCH file first2. Setup Completed3. Find the file path here4. Enter targets click Build Stttings, in the search box, enter prefix to see the prefix HeaderChange the precompile Prefix header to YES , and click the Prefix header to enter the input box and pa

Case: Open source China iOS client When we create a new project, under the supporting files file will see a file ending with-prefix.pch, PCH full name is "precompiled Header", that is, the precompiled header file, the file stored in the project Some of the less frequently modified code, such as a commonly used framework header file, is intended to improve compiler compilation speed. We know that when we modify a file code in a project, the compiler d