检测用户是否拒绝使用默认位置

假设你使用LocationManager,那么在delegate中有个方法是
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

你来检测这个error.code是什么,具体参见apple官方文档Core Location Constants Reference中CLError部分

enum {
kCLErrorLocationUnknown  = 0,         // location is currently unknown, but CL will keep trying
kCLErrorDenied,                       // CL access has been denied (eg, user declined location use)
kCLErrorNetwork,                      // general, network-related error
kCLErrorHeadingFailure,               // heading could not be determined
kCLErrorRegionMonitoringDenied,       // Location region monitoring has been denied by the user
kCLErrorRegionMonitoringFailure,      // A registered region cannot be monitored
kCLErrorRegionMonitoringSetupDelayed, // CL could not immediately initialize region monitoring
kCLErrorRegionMonitoringResponseDelayed, // While events for this fence will be delivered, delivery will not occur immediately
kCLErrorGeocodeFoundNoResult,         // A geocode request yielded no result
kCLErrorGeocodeFoundPartialResult,    // A geocode request yielded a partial result
kCLErrorGeocodeCanceled,              // A geocode request was cancelled
kCLErrorDeferredFailed,               // Deferred mode failed
kCLErrorDeferredNotUpdatingLocation,  // Deferred mode failed because location updates disabled or paused
kCLErrorDeferredAccuracyTooLow,       // Deferred mode not supported for the requested accuracy
kCLErrorDeferredDistanceFiltered,     // Deferred mode does not support distance filters
kCLErrorDeferredCanceled,             // Deferred mode request canceled a previous request


};
 typedef NSInteger CLError;