Why isn t ProjectName-Prefix pch created automatically in Xcode 6

Question

Why isn t ProjectName-Prefix pch created automatically in Xcode 6    Is the precompile header no longer needed    Where should I write the code that was in ProjectName-Prefix pch before

User · Answer

I ll show you with a pic    Add a new File  Go to Project Build Setting APPl LLVM 6 0-Language

User · Answer

Use          PROJECT DIR  Project name PrefixHeader pch

User · Answer

To add  pch file-  1  Add new  pch file to your project- New file- other- PCH file  2  Goto your project s build setting   3  Search  prefix header   You can find that under Apple LLVM   4  Paste this in the field   SRCROOT  yourPrefixHeaderFileName pch  5  Clean and build the project  That s it

User · Answer

I suspect because of modules  which remove the need for the  import  lt Cocoa Cocoa h gt    As to where to put code that you would put in a prefix header  there is no code you should put in a prefix header  Put your imports into the files that need them  Put your definitions into their own files  Put your macros   nowhere  Stop writing macros unless there is no other way  such as when you need   FILE     If you do need macros  put them in a header and include it   The prefix header was necessary for things that are huge and used by nearly everything in the whole system  like Foundation h   If you have something that huge and ubiquitous  you should rethink your architecture  Prefix headers make code reuse hard  and introduce subtle build problems if any of the files listed can change  Avoid them until you have a serious build time problem that you can demonstrate is dramatically improved with a prefix header   In that case you can create one and pass it into clang  but it s incredibly rare that it s a good idea     EDIT  To your specific question about a HUD you use in all your view controllers  yes  you should absolutely import it into every view controller that actually uses it  This makes the dependencies clear  When you reuse your view controller in a new project  which is common if you build your controllers well   you will immediately know what it requires  This is especially important for categories  which can make code very hard to reuse if they re implicit   The PCH file isn t there to get rid of listing dependencies  You should still import UIKit h or Foundation h as needed  as the Xcode templates do  The reason for the PCH is to improve build times when dealing with really massive headers  like in UIKit

User · Answer

Without the question if it is proper or not  you can add PCH file manually   Add new PCH file to the project  New file  gt  Other  gt  PCH file   At the Target s Build Settings option  set the value of Prefix Header to your PCH file name  with the project name as prefix  i e  for project named TestProject and PCH file named MyPrefixHeaderFile  add the value TestProject MyPrefixHeaderFile pch to the plist   TIP  You can use things like   SRCROOT  or   PROJECT DIR  to get to the path of where you put the  pch in the project   At the Target s Build Settings option  set the value of Precompile Prefix Header to YES

User · Answer

You need to create own PCH file Add New file - gt  Other- gt  PCH file  Then add the path of this PCH file to your build setting- gt prefix header- gt path         SRCROOT  filename pch

User · Answer

For add new PCH file follow bellow steps                                                        1  Add New fiew - Select iOS - Other and PCH File   2  add path of this PCH file to your Project - BuildSetting - Apple LLVM 6 0 Language    Add Set Prefix Header Path YourApplicationName root-path  filename pch

User · Answer

If you decide to add a  pch file manually and you want to use Objective-C just like before xCode 6 you will also have to import UIKit and Foundation frameworks in the  pch file  Otherwise you will have 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  lt UIKit UIKit h gt       import  lt Foundation Foundation h gt   endif

[ios] Why isn't ProjectName-Prefix.pch created automatically in Xcode 6?

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