xcode iOS 4.3 上的 libobjc.A.dylib 编译错误
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libobjc.A.dylib compile error on iOS 4.3
提问by oberbaum
I'm having a compiling error in iOS Simulator 4.3 I can't actually figure it out, The error I get is:
我在 iOS Simulator 4.3 中遇到编译错误我实际上无法弄清楚，我得到的错误是：
dyld: lazy symbol binding failed: Symbol not found: _objc_retain
Referenced from: /Users/ben/Library/Application Support/iPhone Simulator/4.3.2/Applications/75915A97-7C3D-489A-B7B0-7B6895A4B584/AppName.app/AppName
Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/usr/lib/libobjc.A.dylib
dyld: Symbol not found: _objc_retain
Referenced from: /Users/ben/Library/Application Support/iPhone Simulator/4.3.2/Applications/75915A97-7C3D-489A-B7B0-7B6895A4B584/AppName.app/AppName
Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/usr/lib/libobjc.A.dylib
Note:
The library being referenced (libobjc.A.dylib) is actually in the 'Expected Place'
The code works fine on an iOS5 device, and in iOS5 Simulator.
注意：
被引用的库 (libobjc.A.dylib) 实际上在“预期位置”中。代码在 iOS5 设备和 iOS5 模拟器上运行良好。
回答by Jerapong Nampetch
Add -fobjc-arcin Build Settings => Other Linker Flags (OTHER_LDFLAGS) for the different configurations
为不同的配置添加-fobjc-arcBuild Settings => Other Linker Flags ( OTHER_LDFLAGS)
回答by Md Mahbubur Rahman
This problem occurs if you use a library that uses ARC and want to build/run on older iOS 4 devices.
如果您使用使用 ARC 的库并希望在较旧的 iOS 4 设备上构建/运行，则会出现此问题。
In Build Settings => Other Linker Flags
在构建设置 => 其他链接器标志
- Add
-fobjc-arc - If yet not solved, then add
-weak_library /usr/lib/libobjc.A.dylib
- 添加
-fobjc-arc - 如果还没有解决，则添加
-weak_library /usr/lib/libobjc.A.dylib
