我是iOSOpenDev Xcode的新手，当我尝试将调整安装到设备时尝试使用iOSOpenDev和Xcode创建调整我遇到如此错误如何克服此错误。
Preparing to run Xcode Build Phase...
Signing /Users/naveenp/Library/Developer/Xcode/DerivedData/VerifayaTest-djfbpvkrsjijkgawzucyzrrhfqtk/Build/Products/Release-iphoneos/VerifayaTest.dylib with codesign... Done.
Copying /Users/naveenp/Library/Developer/Xcode/DerivedData/VerifayaTest-djfbpvkrsjijkgawzucyzrrhfqtk/Build/Products/Release-iphoneos/VerifayaTest.dylib to package directory at /MacMiniBackup/Swift/VerifayaTest/VerifayaTest/Package/Library/MobileSubstrate/DynamicLibraries...
Preparing to build package...
Setting control file /MacMiniBackup/Swift/VerifayaTest/VerifayaTest/Package/DEBIAN/control Version field to 1.0-1 using /MacMiniBackup/Swift/VerifayaTest/VerifayaTest/PackageVersion.plist... Done.
Building package ... xcodebuild: error: SDK "/Applications/Xcode 3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk" cannot be located.
ar: error: unable to find utility "ar", not a developer tool or in PATH
Failed to create Debian archive
Command /bin/sh failed with exit code 72
有关如何安装tweak到设备的任何教程？