pch wiki

First step: Create a new file find Othere in iOS click PCH file to click NextThe second step: Modify the file name is the current project name (usually the same name as the project name), tick targets, click Create createdStep three: Check the path copy in the red boxFourth step: Search for the prefix header and enter in the blanks after this option, or double-clickFifth Step: Enter $ (srcroot) in the box and paste the path you just copied.Sixth step:

$ (srcroot)/prefixheader.pch Auto-fit PCH Address__weak __block typeof (self) weakself = self;__weak typeof (self) weakself = self;#define DN_DEBUG_LOG (FMT, ...){NSLog (@ "%s [line%d]" FMT), __pretty_function__, __line__, # #__VA_ARGS__);}Nsdictionary *ifs = [self fetchssidinfo];NSString *ssid = [[IFS objectforkey:@ "SSID"] lowercasestring];NSString *ssid =ifs[@ "SSID"];NSLog (@ "ifs--%@, WiFi device name--%@", Ifs,ssid);-(ID) fetchssidinfo {Nsarray

Because OpenCV is written in C + +, you need to add Libc++.dylib to other link compilation options when compiling the iOS project, otherwise there will be many errors.Then there is the precompiled header file. pch problem, search on the internet, said in the PCH added OPENCV2/OPENCV.HPP will appear after the "# # Add # include

We know that you can use the Prefix. pch file in the IOS project to perform some pre-compilation operations, such as introducing global header files and defining constants. I encountered an incredible problem when I was preparing to write a Demo today. No matter how I did it, introducing the header file in the pch file would result in an error, saying that the file could not be found, however, why can't I f

Http://www.rockia.net/2013/03/fix-xcode-update-pch-file-errorError:PCH file built from a different branch (clang-425.0.24) than the compiler (clang-425.0.27 )) In fact, this is only a small conflict between different xcode versions, the solution is very easy, as follows: Select products from the xcode menu) Press and hold the option key on the keyboard, and then select the clean build folder Go back to work... Pai_^ Fix xcode upgrade err

to debug them later. Fortunately, there is a more elegant solution, is to add the following piece of code in the project's prefix.pch file, after joining, NSLog only in the debug output, release under not output.How to achieve: in-prefix.pch (PCH full name is "precompiled Header", that is, the precompiled header file, which is stored in the project some infrequently modified code, such as the usual framework header file, so that the purpose of improv

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