pch media

1. pch File:PCH means "precompiled header", called Precompiled header file, Xcode6 after the PCH file needs to be added manually, PCH file generally put some basic unchanged code, such as some macro definitions so that the entire project can be used or some framework of the header files.PCH file is designed to improve the efficiency of compilation, a file is modi

Before Xcode6, create a new project Xcode automatically creates a "project name-prefix.pch" file under the supporting Files folder, which is also a header file, and the contents of the PCH header file can be shared and accessed by all other source files in the project. is a precompiled file.First, let's talk about the role of PCH:1. Store some global macros (macros that are used throughout the project)2. Us

before Xcode6, create a new project Xcode automatically creates a "project name-prefix.pch" file under the supporting Files folder, which is also a header file, and the contents of the PCH header file can be shared and accessed by all other source files in the project. is a precompiled file. First, let's talk about the role of PCH:1. Store some global macros (macros that are used throughout the project)2. U

Before Xcode6, create a new project Xcode automatically creates a "project name-prefix.pch" file under the supporting Files folder, which is also a header file, and the contents of the PCH header file can be shared and accessed by all other source files in the project. is a precompiled file.First, let's talk about the role of PCH:1. Store some global macros (macros that are used throughout the project)2. Us

Before Xcode6, create a new project Xcode automatically creates a "project name-prefix.pch" file under the supporting Files folder, which is also a header file, and the contents of the PCH header file can be shared and accessed by all other source files in the project. is a precompiled file.First, let's talk about the role of PCH:1. Store some global macros (macros that are used throughout the project)2. Us

Tags: HTTP Io OS use AR for file SP 2014 Before xcode6, when creating a project, the system will automatically create a PCH (precompile header) file named by the project name. during the development process, the compiler automatically adds the header files in the PCH file to all source files by including the header files widely used in the entire project, in this way, you can directly use the content in the

iOS development-the role of Info.plist and PCH files1. The role of Info.plist and PCH files2. Common use of UIApplication3. Proxy method for Appdelegate4. The relationship between UIApplication, Appdelegate, UIWindow, Uiviewcontroller5. Full boot process for iOS programs﹣info.plist file ﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣ I'm a split line ﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣Bundle Display Name (previous version) bundle name (new)

PCH file for iOS learning,1. Overview of PCH files A pch file is a pre-compiled header file (generally with the extension. PCH) That precompiles stable code in a project and stores it in a file (. PCH. These pre-compiled codes can be any C/C ++ code-or even inline function

I. INTRODUCTIONFirst the PCH file (ie: Prefix Header) is a precompiled file that is created automatically by creating a new project before Xcode 6, but after Xcode 6, Apple officially changes the way it is automatically created to manual manually created later;This file is primarily used in project engineering to store the more common and stable classes in which the method resources are shared at development time, without having to refer to their head

Swift reads app version information There is time we need to read the app version information such as configuration information, so we can use the method: Nsbundle.mainbundle (). Infodictionary to get Example:SwiftLet infodictionary = Nsbundle.mainbundle (). infodictionaryLet shortversion = infodictionary! ["Cfbundleshortversionstring"]Print (shortversion!)PCH file PCH file name: Generally named after t

Before Xcode6, when a new project is created, the system will automatically create a PCH (precompile header) file with the name of the project, and during the development process, the header files that are widely used throughout the project can be included in the file. The compiler will automatically add the header files in the PCH file to all the source files, so that you can use the contents of the header

Before Xcode6, when a new project is created, the system will automatically create a PCH (precompile header) file with the name of the project, and during the development process, the header files that are widely used throughout the project can be included in the file. The compiler will automatically add the header files in the PCH file to all the source files, so that you can use the contents of the header

1. pch File overview PCH file is a precompiled header file (a generic extension of. PCH) is a project in which the more stable code is pre-compiled and placed in a file (. PCH). These pre-compiled code can be any C/s code--or even an inline function--that is more stable throughout the project, i.e. code that i

Application Scenarios for PCH files:1. Used to define some global macros2. Used to import some global access to the header file (if only need to let. m or. mm file access, do not need to let. c file access, then you need to write the head file to #ifdef _objc_ #endif之间, because. m and. mm files have a default _objc_ Macros and. c files are not ).3. Use the log from definitionThe contents of the PCH file can

Add PCH FileAfter Xcode6 does not automatically create-prefix.pch files to your project, so we want to use the PCH file, we have to manually import, the following describes how to manually add the PCH file to the project directory.(1) Open the Xcode project that you already exist. Select File > New > File > IOS > Other > PCH