objective-c - ld : library not found for -lz

Question

这让我发疯，当我尝试在模拟器上编译时，一切正常，但在设备上我遇到了这个错误:

ld: library not found for -lz
Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang failed with exit code 1

请帮助我了解问题的根源:

    Ld /Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Products/Debug-iphoneos/Fontenay-sous-Bois.app/Fontenay-sous-Bois normal armv7
        cd /Users/ZConsulting/Desktop/Fontenay-sous-Bois
        setenv IPHONEOS_DEPLOYMENT_TARGET 5.0
        setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
        /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk -L/Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Products
/Debug-iphoneos -F/Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Products/Debug-iphoneos -F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs
/iPhoneOS5.0.sdk/Developer/Library/Frameworks -filelist /Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Intermediates/Fontenay-sous-Bois.build/Debug-iphoneos/Fontenay-sous-Bois.build/Objects-normal/armv7/Fontenay-sous-Bois.LinkFileList -dead_strip -fobjc-arc -miphoneos-version-min=5.0 -framework SenTestingKit -lz -lz.1.1.3 -framework MobileCoreServices
 -framework SystemConfiguration -framework CFNetwork -framework CoreLocation -framework MapKit -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Products/Debug-iphoneos/Fontenay-sous-Bois.app/Fontenay-sous-Bois

编辑:

我确实导入了 libz.1.1.3.dylib 框架:

我在链接框架中得到的唯一 libz 是 libz.1.1.3.dylib

Answer 1

您确实在 Linked frameworks and Libraries 项中指定了库 libz.dylib 而不是直接引用 libz.1.1.3 - 通常，您应该使用最通用的库版本进行编译，而不是更具体的版本

其次，确保 libz.dylib 存在于 iOS SDK 下 - 如果它丢失，则可能是错误安装的 SDK(重新安装应该可以解决这个问题)。

即

find /Developer/Platforms -name libz.dylib

应该为 iPhoneOS5.0.sdk 下的 libz.dylib 产生非空输出

另请参阅 iPhone - Linker Error in Xcode 4.2 Preview 的答案，这是一个类似的问题。