相关疑难解决方法(0)

我正在创建一个应用程序,告诉用户他们是否在目的地附近.我正在计算currentLocation目的地之间的距离.我在里面做计算didUpdateLocations.它正在工作但我已经看到有一些方法可以解决这个问题,而无需进行任何数学运算.

我正在注册该地区CLLocationManager; 但似乎这些方法didExitRegion并didEnterRegion没有被调用.

以下是我注册区域的代码部分:

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
    [self.locationManager startUpdatingLocation];
    [self.mySearchBar resignFirstResponder];
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

    self.distToRemind = 0;

    [worldMap removeAnnotations:[worldMap annotations]];
    NSLog(@"executou de primeira");

    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
        [geocoder geocodeAddressString:[self.mySearchBar text] completionHandler:^(NSArray *placemarks, NSError *error)
         {
             CLPlacemark *placemark = [placemarks lastObject];

             //test
             //DefaultAnnotation *annot = [[DefaultAnnotation alloc] initWithCoordinate:placemark.location.coordinate andTitle:@""];
             CLRegion *newRegion = [[CLRegion alloc] initCircularRegionWithCenter:placemark.location.coordinate radius:10.0 identifier:@"RegionBoundary"];

             DefaultAnnotation *regionAnnotation = [[DefaultAnnotation alloc] initWithCoordinate:newRegion.center andTitle:@""];

             [self identifyPlacemark:placemark andSetAnnotation:regionAnnotation];

             MKCoordinateRegion …