ios - 如何访问 MKMapItem 的类别或类型

Question

我正在编写一个使用 MapKit 的应用程序。我已经实现了 MKLocalSearch，并且得到了一组 MKMapItem。但是我想知道是否有可能获得每个项目的类别。例如，在 map 应用程序中，商店、酒店、火车站等显示不同的图标。此外，如果您查看地标。您会得到一个类别标签，例如 Grocery。作为开发人员，我可以访问 map 项的信息吗？如果是这样，我想知道怎么做。

谢谢

Answer 1

是的，您可以获得此信息。有关搜索位置的信息详细信息，请参见以下方法。

恐怕您只能从 MKPlacemark 获取地址详细信息。

现在您要做的是，从 MKPlacemark 获取地址详细信息，并且您需要借助任何开源 API 来帮助您将地址分类到某些标签/注释中。

一个好的 API 是 Mapbox ，可惜是付费的。

因此，您可以从第三方 API 进行神奇的搜索。我没有搜索 API/WebService 的种类，但它应该在那里。

objective-c 代码:

- (void) searchForPlace:(NSString *) keyWord {
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

    MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
    request.naturalLanguageQuery = keyWord; // @"restaurant"
    MKCoordinateSpan span = MKCoordinateSpanMake(.1, .1);

    CLLocationCoordinate2D location = self.mapView.centerCoordinate;
    request.region = MKCoordinateRegionMake(location, span);
    MKLocalSearch *search = [[MKLocalSearch alloc] initWithRequest:request];

    [search startWithCompletionHandler:
     ^(MKLocalSearchResponse *response, NSError *error) {
         [self.txtSearch setEnabled:YES];
         [self removeMapOverlay];

         [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
         if (!error) {
             // Result found
             @try {

                 if (response.mapItems && [response.mapItems count] > 0) {

                     for (MKMapItem *item in response.mapItems) {
                         MKPlacemark *placeMark = item.placemark;

                         // Address details
                         NSDictionary *address = placeMark.addressDictionary;
                         NSString *titleString = @"";
                         NSString *subtitleString = @"";
                         NSString *name = @"";
                         NSString *Thoroughfare = @"";
                         NSString *State = @"";
                         NSString *City = @"";
                         NSString *Country = @"";

                         name = [address objectForKey:@"Name"] ? [address objectForKey:@"Name"] : @"";
                         Thoroughfare = [address objectForKey:@"Thoroughfare"] ? [address objectForKey:@"Thoroughfare"] : @"";
                         State = [address objectForKey:@"State"] ? [address objectForKey:@"State"] : @"";
                         City = [address objectForKey:@"City"] ? [address objectForKey:@"City"] : @"";
                         Country = [address objectForKey:@"Country"] ? [address objectForKey:@"Country"] : @"";

                         titleString = [NSString stringWithFormat:@"%@ %@", name, Thoroughfare];
                         subtitleString = [NSString stringWithFormat:@"%@ %@ %@", State, City, Country];

                         CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithTitle:titleString subTitle:subtitleString detailURL:item.url location:placeMark.location.coordinate];
                         [self.mapView addAnnotation:annotation];
                     }
                     [self mapView:self.mapView regionDidChangeAnimated:YES];
                 }

             }
             @catch (NSException *exception) {
                 NSLog(@"Exception :%@",exception.description);
             }

         } else {
             NSLog(@"No result found.");
         }
     }];
}

Swift 代码:

func searchForPlace(keyword: String) {

    UIApplication.sharedApplication().networkActivityIndicatorVisible = true

    var requset = MKLocalSearchRequest()
    requset.naturalLanguageQuery = keyword

    let span = MKCoordinateSpanMake(0.1, 0.1)
    let region = MKCoordinateRegion(center: self.mapView.centerCoordinate, span: span)

    var search = MKLocalSearch(request: requset)

    search.startWithCompletionHandler { (var response: MKLocalSearchResponse!, var error: NSError!) -> Void in
        UIApplication.sharedApplication().networkActivityIndicatorVisible = false

        if (error != nil) {
            // Result found

            if (response.mapItems != nil && response.mapItems.count > 0) {

                for item: MKMapItem! in response.mapItems as [MKMapItem] {
                    var placeMark = item.placemark as MKPlacemark!

                    // Address details...
                    var address = placeMark.addressDictionary as NSDictionary!
                    var titleString: String!
                    var subtitleString: String!
                    var name: String!
                    var Thoroughfare: String!
                    var State: String!
                    var City: String!
                    var Country: String!

                    var emptyString: String! = " "

                    name = (address.objectForKey("name") != nil ? address.objectForKey("name") : emptyString) as String
                    Thoroughfare = (address.objectForKey("Thoroughfare") != nil ? address.objectForKey("Thoroughfare") : emptyString) as String
                    State = (address.objectForKey("State") != nil ? address.objectForKey("State") : emptyString) as String
                    City = (address.objectForKey("City") != nil ? address.objectForKey("City") : emptyString) as String
                    Country = (address.objectForKey("Country") != nil ? address.objectForKey("Country") : emptyString) as String

                    titleString = String(format: "%@ %@", name, Thoroughfare)
                    subtitleString = String(format: "%@ %@ %@", State, City, Country)

                    var customAnnotation = CustomAnnotation(coordinate: placeMark.location.coordinate, title: titleString, subtitle: subtitleString, detailURL: item.url)
                    self.mapView.addAnnotation(customAnnotation)
                }

                self.mapView(self.mapView, regionDidChangeAnimated: true)
            }
        }

    }
}