Xcode 4.5 error on IOS 5

Question

I installed the GM version of xcode and i started to receive this error when i try to install my app on IOS 5 . The app works fine on IOS 6. Could someone please tell me what could be the problem ? I included the libobjc.A.dylib library and i get the same .

dyld: lazy symbol binding failed: Symbol not found: _objc_setProperty_atomic_copy

Referenced from: /var/mobile/Applications/8BCAAF22-5857-427D-9FDA-48D369CF3DD8/FlipBookApp.app/FlipBookApp Expected in: /usr/lib/libobjc.A.dylib

dyld: Symbol not found: _objc_setProperty_atomic_copy Referenced from: /var/mobile/Applications/8BCAAF22-5857-427D-9FDA-48D369CF3DD8/FlipBookApp.app/FlipBookApp Expected in: /usr/lib/libobjc.A.dylib

Answer 1

在GData项目中 - >构建设置 - >将“iOS部署目标”更改为5.1

Answer 2

添加的静态库的“iOS部署目标”值必须小于或等于项目的值。