Undefined symbols for architecture i386:
"_OBJC_CLASS _ $ _ CLLocationManager",引自:RootViewController.o中的objc-class-ref"_kCLLocationAccuracyNearestTenMeters",引自: - RootViewController.o中的[RootViewController locationManager] ld:未找到架构i386的符号collect2:ld返回1退出状态