iOS——判断当前应用是否允许定位

判断用户是否开启了定位功能：if ([CLLocationManager locationServicesEnabled] &&

        ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorized

         || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)) {

            //定位功能可用，开始定位

            _locationManger = [[CLLocationManager alloc] init];

            _locationManger.delegate = self;

            [_locationManger startUpdatingLocation];

            

        } else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {

            NSLog(@"不可用");
        }

如果不可用，则提醒用户前往设置中去设置开启定位，并为用户设置跳转路径：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"开启定位" message:@"The calendar permission was not authorized. Please enable it in Settings to continue." preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction *setting = [UIAlertAction actionWithTitle:@"设置" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        NSURL *appSettings = [NSURL URLWithString:[NSString stringWithFormat:@"%@",UIApplicationOpenSettingsURLString]];

        [UIApplication.sharedApplication openURL:appSettings];

        

    }];

    UIAlertAction *cancle = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        

    }];

    [alertController addAction:setting];

    [alertController addAction:cancle];

    [self presentViewController:alertController animated:YES completion:nil];