我一直在研究 iOS 应用的构建过程。我创建了一个“单视图应用程序”项目并在 Xcode 8.2.1 中构建。在查看构建报告时,我注意到 Xcode 使用 clang 编译和链接 .m 文件,然后使用 ibtool 编译和链接故事板文件。我想知道 ibtool 在编译和链接过程中实际上在做什么。在以下编译命令之后,会在目录下创建 .storyboardc 文件,这些文件/Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Intermediates/ObjCHelloWorld.build/Debug-iphonesimulator/ObjCHelloWorld.build/Base.lproj/
将在稍后的“链接故事板”阶段使用。.storyboardc
文件是包含 Info.plist 文件的二进制文件包。
ObjCHelloWorld/Base.lproj/LaunchScreen.storyboard
cd /Users/Kazu/Dropbox/ObjCHelloWorld
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
export XCODE_DEVELOPER_USR_PATH=/Applications/Xcode.app/Contents/Developer/usr/bin/..
/Applications/Xcode.app/Contents/Developer/usr/bin/ibtool --errors --warnings --notices --module ObjCHelloWorld --output-partial-info-plist /Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Intermediates/ObjCHelloWorld.build/Debug-iphonesimulator/ObjCHelloWorld.build/LaunchScreen-SBPartialInfo.plist --auto-activate-custom-fonts --target-device iphone --target-device ipad --minimum-deployment-target 10.2 --output-format human-readable-text --compilation-directory /Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Intermediates/ObjCHelloWorld.build/Debug-iphonesimulator/ObjCHelloWorld.build/Base.lproj /Users/Kazu/Dropbox/ObjCHelloWorld/ObjCHelloWorld/Base.lproj/LaunchScreen.storyboard
在链接阶段,执行以下命令,我不知道 ibtool 在做什么。我只能说它使用的是storyboardc
在编译阶段生成的文件。
LinkStoryboards
cd /Users/Kazu/Dropbox/ObjCHelloWorld
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
export XCODE_DEVELOPER_USR_PATH=/Applications/Xcode.app/Contents/Developer/usr/bin/..
/Applications/Xcode.app/Contents/Developer/usr/bin/ibtool --errors --warnings --notices --module ObjCHelloWorld --target-device iphone --target-device ipad --minimum-deployment-target 10.2 --output-format human-readable-text --link /Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Products/Debug-iphonesimulator/ObjCHelloWorld.app /Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Intermediates/ObjCHelloWorld.build/Debug-iphonesimulator/ObjCHelloWorld.build/Base.lproj/LaunchScreen.storyboardc /Users/Kazu/Library/Developer/Xcode/DerivedData/ObjCHelloWorld-guewhpmwckompbfvsbhizkifcadg/Build/Intermediates/ObjCHelloWorld.build/Debug-iphonesimulator/ObjCHelloWorld.build/Base.lproj/Main.storyboardc
我的问题是,ibtool 在链接阶段做了什么?是否有任何产品或它链接到由 clang 完成的先前链接阶段创建的可执行文件?