百度地图怎么计算2个坐标点得出距离

: warning: ignoring file /Users/Eric/Desktop/abc/abctest/libbaidumapapi.a, missing required architecture arm64 in file /Users/Eric/Desktop/abc/abctest/libbaidumapapi.a (3 slices)Undefined symbols for architecture arm64: "_OBJC_CLASS_$_BMKPolyline", referenced from: objc-class-ref in MapViewController.o "_OBJC_CLASS_$_BMKPinAnnotationView", referenced from: objc-class-ref in MapViewController.o "_OBJC_CLASS_$_BMKSearch", referenced from: objc-class-ref in MapViewController.o "_OBJC_CLASS_$_BMKMapView", referenced from: objc-class-ref in MapViewController.o "_OBJC_CLASS_$_BMKPolylineView", referenced from: objc-class-ref in MapViewController.o "_OBJC_CLASS_$_BMKAnnotationView", referenced from: _OBJC_CLASS_$_CalloutAnnotationView in CalloutAnnotationView.o objc-class-ref in MapViewController.o "_OBJC_METACLASS_$_BMKAnnotatio