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如何在某个程序里面判定当前应用程序的定位服务是否可用
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SO上有一个答案。
[CLLocationManager locationServicesEnabled]检测的是整个iOS系统的位置服务开关，无法检测当前应用是否被关闭，只能通过CLLocationManagerDelegate的locationManager:didFailWithError:方法去检测：
[CLLocationManager locationServicesEnabled]
CLLocationManagerDelegate
locationManager:didFailWithError:
- (void)locationManager: (CLLocationManager *)manager didFailWithError: (NSError *)error { NSString *errorString; [manager stopUpdatingLocation]; NSLog(@"Error: %@",[error localizedDescription]); switch([error code]) { case kCLErrorDenied: //Access denied by user errorString = @"Access to Location Services denied by user"; //Do something... break; case kCLErrorLocationUnknown: //Probably temporary... errorString = @"Location data unavailable"; //Do something else... break; default: errorString = @"An unknown error has occurred"; break; } } UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; [alert show]; [alert release]; }
具体的CLError信息可以看CLLocationManager文档
2013 年的答案太老了， iOS 4.2 以后可以用 +(BOOL)locationServicesEnabled 和 + (CLAuthorizationStatus)authorizationStatus 两个方法来检查，前者是检查手机是否开启了定位，后者是检查应用是否拥有定位的权限。
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SO上有一个答案。
[CLLocationManager locationServicesEnabled]检测的是整个iOS系统的位置服务开关，无法检测当前应用是否被关闭，只能通过CLLocationManagerDelegate的locationManager:didFailWithError:方法去检测：- (void)locationManager: (CLLocationManager *)manager didFailWithError: (NSError *)error { NSString *errorString; [manager stopUpdatingLocation]; NSLog(@"Error: %@",[error localizedDescription]); switch([error code]) { case kCLErrorDenied: //Access denied by user errorString = @"Access to Location Services denied by user"; //Do something... break; case kCLErrorLocationUnknown: //Probably temporary... errorString = @"Location data unavailable"; //Do something else... break; default: errorString = @"An unknown error has occurred"; break; } } UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; [alert show]; [alert release]; }具体的CLError信息可以看CLLocationManager文档
2013 年的答案太老了， iOS 4.2 以后可以用 +(BOOL)locationServicesEnabled 和 + (CLAuthorizationStatus)authorizationStatus 两个方法来检查，前者是检查手机是否开启了定位，后者是检查应用是否拥有定位的权限。