问题
I have a ARC (automatic-reference-counting) app that builds a static library (also ARC). The app will launch fine but when the an action is performed that reads or writes to a @property in the static library the app will crash with this error:
dyld: lazy symbol binding failed: Symbol not found: _objc_setProperty_nonatomic
Referenced from: /var/mobile/Applications/0E7ADBB4-FFE5-4CEB-B418-8A35A92E99D4/MyApp.app/MyApp
Expected in: /usr/lib/libobjc.A.dylib
dyld: Symbol not found: _objc_setProperty_nonatomic
Referenced from: /var/mobile/Applications/0E7ADBB4-FFE5-4CEB-B418-8A35A92E99D4/MyApp.app/MyApp
Expected in: /usr/lib/libobjc.A.dylib
All the advice has been about linking non-ARC libraries to ARC Apps (or vice-versa). But these are both ARC.
回答1:
The app's Base SDK was set to iOS 6 and iOS Deployment Target was set to iOS 5.0 however for the static library both the Base SDK & iOS Deployment Target were set to iOS 6.
Making sure the Base SDK & iOS Deployment Target matched in the app and library solved this problem.
来源：https://stackoverflow.com/questions/12641190/arc-app-crashes-when-accessing-property-form-arc-static-lib