XCode环境变量及路径设置

一般我们在xcode里面配置包含工程目录下头文件的时候，都要关联着相对路径和绝对路径，如果只是自己用这个项目，用绝对路径的问题不大，但是如果你把工程发给别人，别人就要在改这个绝对路径，这时候绝对路径的缺点立马出现。

所以在修改User Header Search Paths这个选项的时候使用
"$(SRCROOT)/当前工程名字/需要包含头文件所在文件夹"
将上面的双引号里面的字符串拷贝之后，你会发现这个“$(SRCROOT)”，会自动变成当前工程所以的目录。
这样就可以了，发给别人，别人也不用在去修改路径了。




xcode4的环境变量，Build Settings参数，workspace及联编设置
一、xcode4中的环境变量

$(BUILT_PRODUCTS_DIR)
build成功后的，最终产品路径－－可以在Build Settings参数的Per-configuration Build Products Path项里设置

$(TARGET_NAME)
目标工程名称

$(SRCROOT)
工程文件（比如Nuno.xcodeproj）的路径 

$(CURRENT_PROJECT_VERSION)
当前工程版本号

 

其他：

当编译静态库，设备选模拟器(iPhone 5.0 Simulator)，未设置任何Build Settings参数时，默认的基础路径：

/Users/xxx/Library/Developer/Xcode/DerivedData/xxxWorkspace-caepeadwrerdcrftijaolkkagbjf

下面用$()代替上面一长串东东

$(SYMROOT) = $()/Build/Products

$(BUILD_DIR) = $()/Build/Products

$(BUILD_ROOT) =  $()/Build/Products

这三个变量中的$()不会随着Build Settings参数的设置而改变

相反，以下可以通过设置而改变

$(CONFIGURATION_BUILD_DIR) = $()/Build/Products/Debug-iphonesimulator

$(BUILT_PRODUCTS_DIR) = $()/Build/Products/Debug-iphonesimulator

$(CONFIGURATION_TEMP_DIR) = $()/Build/Intermediates/UtilLib.build/Debug-iphonesimulator

$(TARGET_BUILD_DIR) = $()/Build/Products/Debug-iphonesimulator

$(SDK_NAME) = iphonesimulator5.0

$(PLATFORM_NAME) = iphonesimulator

$(CONFIGURATION) = Debug

$(TARGET_NAME) = UtilLib

$(EXECUTABLE_NAME) = libUtilLib.a 可执行文件名

${IPHONEOS_DEPLOYMENT_TARGET} 5.0

$(ACTION) = build

$(CURRENTCONFIG_SIMULATOR_DIR) 当前模拟器路径 

$(CURRENTCONFIG_DEVICE_DIR) 当前设备路径 

 

$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME =

$()/Build/Products/Debug-iphonesimulator

$(PROJECT_TEMP_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME) = $()/Build/Intermediates/UtilLib.build/Debug-iphonesimulator

 

自定义变量

${CONFIGURATION}-iphoneos 表示：Debug-iphoneos

${CONFIGURATION}-iphonesimulator 表示：Debug-iphonesimulator

$(CURRENTCONFIG_DEVICE_DIR) = ${SYMROOT}/${CONFIGURATION}-iphoneos

$(CURRENTCONFIG_SIMULATOR_DIR) = ${SYMROOT}/${CONFIGURATION}-iphonesimulator

自定义一个设备无关的路径（用来存放各种架构arm6/arm7/i386输出的产品）

$(CREATING_UNIVERSAL_DIR) = ${SYMROOT}/${CONFIGURATION}-universal

自定义变量代表的值

$(CURRENTCONFIG_DEVICE_DIR) ＝ $()/Build/Products/Debug-iphoneos

$(CURRENTCONFIG_SIMULATOR_DIR) = $()/Build/Products/Debug-iphonesimulator

$(CREATING_UNIVERSAL_DIR) = $()/Build/Products/Debug-universal

 

iphoneos5.0下的编译脚本：

xcodebuild -project "UtilLib.xcodeproj" -configuration "Debug" -target "UtilLib" -sdk "iphoneos5.0" -arch "armv6 armv7" build RUN_CLANG_STATIC_ANALYZER=NO  $(BUILD_DIR)="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}"

 

iphonesimulator5.0下的编译脚本：

xcodebuild -project "UtilLib.xcodeproj" -configuration "Debug" -target "UtilLib" -sdk "iphonesimulator5.0" -arch "i386" build RUN_CLANG_STATIC_ANALYZER=NO $(BUILD_DIR)="${BUILD_DIR}"  BUILD_ROOT="${BUILD_ROOT}"

加上下面一句表示输出到文件：

> "${BUILD_ROOT}.build_output"

 

lipo脚本工具：合并iPhone模拟器和真机的静态类库，生成通用库

lipo -create -output "${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_DEVICE_DIR}/${EXECUTABLE_NAME}"         "${CURRENTCONFIG_SIMULATOR_DIR}/${EXECUTABLE_NAME}"

意思是：把"${CURRENTCONFIG_DEVICE_DIR}目录下的.a文件，和${CURRENTCONFIG_SIMULATOR_DIR}目录下的.a文件合并，

在${CREATING_UNIVERSAL_DIR}目录下，生成两个设备都通用的静态库,

例如：lipo -create -output xy.a x.a y.a

 

二、xcode4中build Settings常见参数解析

1.Installation Directory：安装路径

静态库编译时，在Build Settings中Installation Directory设置“$(BUILT_PRODUCTS_DIR)”

Skip Install设为YES

Installation Directory默认为/usr/local/lib

因为Build Location默认时，.a文件会放在很长（比如：/Users/xxx/Library/Developer/Xcode/DerivedData/xxxProgram

dalrvzehhtesxdfqhxixzafvddwe/Build/Products/Debug-iPhoneos）的路径下，或是我们target指定的路径

Skip Install如果是NO,可能会被安装到默认路径/usr/local/lib

2.Public Headers Folder Path：对外公开头文件路径

设为“include”（具体的头文件路径为：$(BUILT_PRODUCTS_DIR)/include/xx.h）

在最终文件.a同级目录下生成一个include目录

默认：/usr/local/include

Public Headers Folder Path这个路径就是使用这lib的某工程需要依赖的外部头文件.导入这路径后，#include/import "xx.h"才能看到

3.User Header Search Paths：依赖的外部头文件搜索路径

设置为“$(BUILT_PRODUCTS_DIR)/include”

和2中路径对应

4.Per-configuration Build Products Path：最终文件路径

比如设为“../app”，就会在工程文件.xcodeproj上一层目录下的app目录里，创建最终文件

默认为$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME) 

等于$(BUILT_PRODUCTS_DIR)

5.Per-configuration Intermediate Build Files Path：临时中间文件路径

默认为：$(PROJECT_TEMP_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)

6.Code Signing Identity：真机调试的证书选择

选一个和Bundle identifier相对应的证书

Library Search Paths：库搜索路径

Architectures：架构，设为 armv6 或 armv7

Valid Architectures：应用框架，可以设为 armv6、 armv7 或i386

Product Name:工程文件名，默认为$(TARGET_NAME)

Info.plist File：info文件路径

Build Variants：默认为normal

Other Linker Flags：其他链接标签

设为“-ObjC”

当导入的静态库使用了类别，需要设为-ObjC

iOS Deployment Target：ios部署对象

比如可以选择设为，ios3到ios5的一种版本

Prefix Header：预编头文件（比如：UtilLib/UtilLib-Prefix.pch）

Precompile Prefix Header：设为“Yes”，表示允许加入预编译头

 

三、workspace（工作区）

作用：管理多个工程（project），多工程联编

 

四、workspace多工程联编设置

一、

1.新建一个静态库工程，比如UtilLib，并生成UtilLib.h和UtilLib.m文件

2.选中需要公开的头文件，


把右侧栏的Target Membership中设置为public


或则，选中工程目录target的Build Phases标签的copy headers项，在public中添加要公开的头文件


3.Architectures设为：armv6 armv7

4.Valid Architectures设为：armv6 armv7 i386

5.Build Products Path设为：$(SRCROOT)/../build

6.Per-configuration Build Products Path设为：

$(SRCROOT)/../build/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)

7.Per-configuration Intermediate Build Files Path设为：

$(SRCROOT)/../build/$(TARGET_NAME).build/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)

8.设置安装路径：Installation Directory项


9.设置对外公开的头文件路径：Public Headers Folder Path项




10.为静态库添加依赖的shell脚本

选中工程目录target的Build Phases标签，点击由下角的Add Build Phase按钮


在弹出的菜单里选择Add run script项，然后页面中会多出一个Run Script项


在黑框里填写"$SRCROOT/mergeArmSymbols.sh"


建立对此脚本的依赖（编译静态库的后会运行此脚本）

如果编译时设备选的是iphone simulator：

则此脚本会在对应iphone device的产品目录Debug-iphoneos中，生成对device有用的.a静态库，

相反，如果设备选的是iphone device：

则此脚本会在对应iphone simulator的产品目录Debug-iphoneos中，生成对simulator有用的.a静态库

最后，此脚本调用lipo工具，把本工程生成静态库与此脚本生成的静态库合并，生成simulator和device都通用的.a文件

 

11.具体bash shell脚本如下：

[plain] view plaincopy
mergeArmSymbols.sh  
 # Version 2.0 (updated for Xcode 4, with some fixes)  
   
 # Author: Adam Martin - http://twitter.com/redglassesapps  
 # Based on: original script from Eonil (main changes: Eonil's script WILL NOT WORK in Xcode GUI - it WILL CRASH YOUR COMPUTER)  
 #  
 # More info: see this Stack Overflow question: http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4  
   
 #################[ Tests: helps workaround any future bugs in Xcode ]########  
 #  
 DEBUG_THIS_SCRIPT="true"  
   
 if [ $DEBUG_THIS_SCRIPT = "true" ]  
 then  
 echo "########### TESTS #############"  
 echo "Use the following variables when debugging this script; note that they may change on recursions"  
 echo "BUILD_DIR = $BUILD_DIR"  
 echo "BUILD_ROOT = $BUILD_ROOT"  
 echo "CONFIGURATION_BUILD_DIR = $CONFIGURATION_BUILD_DIR"  
 echo "BUILT_PRODUCTS_DIR = $BUILT_PRODUCTS_DIR"  
 echo "CONFIGURATION_TEMP_DIR = $CONFIGURATION_TEMP_DIR"  
 echo "TARGET_BUILD_DIR = $TARGET_BUILD_DIR"  
 echo "SDK_NAME = $SDK_NAME"  
 echo "PLATFORM_NAME = $PLATFORM_NAME"  
 echo "CONFIGURATION = $CONFIGURATION"  
 echo "TARGET_NAME = $TARGET_NAME"  
 echo "ARCH_TO_BUILD = $ARCH_TO_BUILD"  
 echo "ARCH_TO_BUILD = $ARCH_TO_BUILD"  
 echo "ACTION = $ACTION"  
 echo "SYMROOT = $SYMROOT"  
 echo "EXECUTABLE_NAME = $EXECUTABLE_NAME"  
 echo "CURRENTCONFIG_SIMULATOR_DIR = $CURRENTCONFIG_SIMULATOR_DIR"  
 echo "CURRENTCONFIG_DEVICE_DIR = $CURRENTCONFIG_DEVICE_DIR"  
   
 echo "#############Other###########"  
 echo "BUILD_DIR/CONFIGURATION/EFFECTIVE_PLATFORM_NAME = $BUILD_DIR/$CONFIGURATION$EFFECTIVE_PLATFORM_NAME"  
   
 echo "PROJECT_TEMP_DIR/CONFIGURATION/EFFECTIVE_PLATFORM_NAME = $PROJECT_TEMP_DIR/$CONFIGURATION$EFFECTIVE_PLATFORM_NAME"  
   
 fi  
   
 #####################[ part 1 ]##################  
 # First, work out the BASESDK version number  
 #    (incidental: searching for substrings in sh is a nightmare! Sob)  
   
 SDK_VERSION=$(echo ${SDK_NAME} | grep -o '.{3}$')  
   
 # Next, work out if we're in SIM or DEVICE  
   
 if [ ${PLATFORM_NAME} = "iphonesimulator" ]  
 then  
 OTHER_SDK_TO_BUILD=iphoneos${SDK_VERSION}  
 ARCH_TO_BUILD="armv6 armv7"  
 else  
 OTHER_SDK_TO_BUILD=iphonesimulator${SDK_VERSION}  
 ARCH_TO_BUILD="i386"  
 fi  
   
 echo "XCode has selected SDK: ${PLATFORM_NAME} with version: ${SDK_VERSION} (although back-targetting: ${IPHONEOS_DEPLOYMENT_TARGET})"  
 echo "...therefore, OTHER_SDK_TO_BUILD = ${OTHER_SDK_TO_BUILD}"  
 #  
 #####################[ end of part 1 ]##################  
   
 #####################[ part 2 ]##################  
 #  
 # IF this is the original invocation, invoke whatever other builds are required  
 #  
 # Xcode is already building ONE target... build ONLY the missing platforms/configurations.  
   
 if [ "true" == ${ALREADYINVOKED:-false} ]  
 then  
 echo "RECURSION: Not the root invocation, don't recurse"  
 else  
 # Prevent recursion  
 export ALREADYINVOKED="true"  
   
 echo "RECURSION: I am the root... recursing all missing build targets..."  
 echo "RECURSION: ...about to invoke: xcodebuild -configuration "${CONFIGURATION}" -target "${TARGET_NAME}" -sdk "${OTHER_SDK_TO_BUILD}" -arch "${ARCH_TO_BUILD}" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO"  
 xcodebuild -project "${TARGET_NAME}.xcodeproj" -configuration "${CONFIGURATION}" -target "${TARGET_NAME}" -sdk "${OTHER_SDK_TO_BUILD}" -arch "${ARCH_TO_BUILD}" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" > "${BUILD_ROOT}.build_output"  
 ACTION="build"  
   
 # Merge all platform binaries as a fat binary for each configurations.  
   
 # Calculate where the (multiple) built files are coming from:  
 CURRENTCONFIG_DEVICE_DIR=${SRCROOT}/../build/${CONFIGURATION}-iphoneos  
 CURRENTCONFIG_SIMULATOR_DIR=${SRCROOT}/../build/${CONFIGURATION}-iphonesimulator  
   
 echo "Taking device build from: ${CURRENTCONFIG_DEVICE_DIR}"  
 echo "Taking simulator build from: ${CURRENTCONFIG_SIMULATOR_DIR}"  
   
 CREATING_UNIVERSAL_DIR=${SRCROOT}/../build/${CONFIGURATION}-universal  
 echo "...outputing a universal arm6/arm7/i386 build to: ${CREATING_UNIVERSAL_DIR}"  
   
 # ... remove the products of previous runs of this script  
 #      NB: this directory is only created by this script - it should be safe to delete  
   
 rm -rf "${CREATING_UNIVERSAL_DIR}"  
 mkdir "${CREATING_UNIVERSAL_DIR}"  
   
 #  
 echo "lipo: for current configuration (${CONFIGURATION}) creating output file: ${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}"  
 lipo -create -output "${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_DEVICE_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_SIMULATOR_DIR}/${EXECUTABLE_NAME}"  
   
 #######custom########  
 #copy universal lib to ../libs  
 libsDir=../libs  
 includeDir=../include  
   
 rm -rf "${libsDir}"  
 mkdir -p "${libsDir}"  
   
 echo "cp -R ${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME} ${libsDir}"  
   
 cp -R "${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" "${libsDir}"  
   
 echo "cp -R ${CURRENTCONFIG_DEVICE_DIR}/include ${includeDir}"  
   
 cp -R "${CURRENTCONFIG_DEVICE_DIR}/include" "${includeDir}"  
   
 fi  


下载右边的图片，然后把后缀改为.sh（其实就是上面的脚本，因为博客园只能上传图片)

静态库编译后的目录结构如下：



 

二、 

1.新建主工程，比如Nuno，添加对静态库的依赖

点击工程，在Build Phases标签的Link Binary With Libraries项中点击加号添加UtilLib.a库




选中上面的红色项，在右边栏的Location选Relative to Project，把值设为../libs/libUtilLib.a

2.设置主工程依赖的外部头文件路径：User Header Search Paths项

$(SRCROOT)/../include

3.设置Header Search Paths为：$(SRCROOT)/../include

4.设置Library Search Paths为：$(SRCROOT)/../libs

编译运行即可实现联编 

 

(备注：选择模拟器iphone 5.0 simulator，编译静态库的时，最终文件会在Debug-iphonesimulator，就算成功.a文件还是红色，

这是可能是xcode的bug，不会自动切换路径

因为$(BUILT_PRODUCTS_DIR)所指的位置，是build/Debug-iphonesos,不是包含最终.a文件的Debug-iphonesimulator；

选择ios Device，编译成的最终文件才在build/Debug-iphonesos下，.a文件变成非红色

所有得用mergeArmSymbols.sh脚本来解决）



reference: 
http://blog.sina.com.cn/s/blog_6de18992010190kk.html
http://www.cnblogs.com/xiaodao/archive/2012/03/28/2422091.html