Integration of Baidu map in iOS development-map tagging & amp; POI retrieval and ios development map tagging

Integration of Baidu map in iOS development-map tagging & POI retrieval, and ios development map tagging

This article consists of two parts:

I. Map tagging
　　Step 1: first create the BMKMapView
Step 2: set after the view is fully displayed and implement the proxy method
Step 3: run the program. The Pin effect can be displayed normally.
Ii. POI search
　　Step 1: delayed object Loading
Step 2: implement the bmkcancearchdelegate proxy method
Step 3: Implement bmkcancearchdelegate to process callback results
Step 4: run the program, and you will be able to retrieve the notes related to snacks nearby.

I. Map tagging

To label BMKAnnotation, you must implement protocal <BMKMapViewDelegate>

Step 1: first create the BMKMapView

- (BMKMapView *)mapView {    if (!_mapView) {        _mapView = [[BMKMapView alloc] initWithFrame:self.view.bounds];        self.view = _mapView;    }    return _mapView;}

 Step 2: set after the view is fully displayed and implement the proxy method

-(Void) viewDidAppear :( BOOL) animated {// Add a PointAnnotation BMKPointAnnotation * annotation = [[BMKPointAnnotation alloc] init]; CLLocationCoordinate2D coor; coor. latitude = 39.915; coor. longpolling = 116.404; annotation. coordinate = coor; annotation. title = @ "Beijing"; annotation. subtitle = @ "I cannot breathe for you ~ "; [_ MapView addAnnotation: annotation];} // custom add pin method-(void) addAnnoWithPT :( CLLocationCoordinate2D) coor andTitle :( NSString *) title andAddress :( NSString *) address {// Add a PointAnnotation BMKPointAnnotation * annotation = [[BMKPointAnnotation alloc] init]; annotation. coordinate = coor; annotation. title = title; annotation. subtitle = address; [_ mapView addAnnotation: annotation] ;}# pragma mark # pragma mar The k-marker proxy method is used to add a pin (BMKAnnotationView *) mapView :( BMKMapView *) mapView viewForAnnotation :( id <BMKAnnotation>) annotation {static NSString * identifier = @ "myAnnotation "; if ([annotation isKindOfClass: [BMKPointAnnotation class]) {BMKPinAnnotationView * newAnnotationView = (BMKPinAnnotationView *) [mapView identifier: identifier]; if (! NewAnnotationView) {newAnnotationView = [[BMKPinAnnotationView alloc] initWithAnnotation: annotation reuseIdentifier: identifier];} newAnnotationView. annotation = annotation; newAnnotationView. pinColor = BMKPinAnnotationColorPurple; newAnnotationView. animatesDrop = YES; // set the animation display for this annotation point. // Add a button to listen to the Click Event UIButton * btn = [UIButton buttonWithType: UIButtonTypeContactAdd]; newAnnotationView. rightCalloutAccessoryView = btn; [btn addTarget: self action: @ selector (click) forControlEvents: UIControlEventTouchUpInside]; return newAnnotationView;} return nil ;}

 

 Step 3: run the program. The Pin effect can be displayed normally.

 

Ii. POI search

Step 1: delayed object Loading

- (BMKPoiSearch *)poiSearch {    if (!_poiSearch) {        _poiSearch = [[BMKPoiSearch alloc] init];        _poiSearch.delegate = self;    }    return _poiSearch;}

Step 2: implement the bmkcancearchdelegate proxy method

// This method is called when a long-pressed map is used-(void) mapview :( BMKMapView *) mapView onLongClick :( CLLocationCoordinate2D) coordinate {// initiate retrieval BMKNearbySearchOption * option = [[BMKNearbySearchOption alloc] init]; option. pageIndex = 0; option. pageCapacity = 20; option. location = coor; option. keyword = @ "snacks"; BOOL flag = [self. poiSearch incluearchnearby: option]; if (flag) {NSLog (@ "nearby retrieval sent successfully");} else {NSLog (@ "nearby retrieval failed ");} // set the initialization region CLLocationCoordinate2D center = option. location; BMKCoordinateSpan span; span. latitudeDelta = 0.016263; span. longitudeDelta = 0.012334; BMKCoordinateRegion region; region. center = center; region. span = span; [self. mapView setRegion: region animated: YES];}

Step 3: Implement bmkcancearchdelegate to process callback results

-(Void) onGetPoiResult :( bmkincluearch *) searcher result :( BMKPoiResult *) poiResultList errorCode :( BMKSearchErrorCode) error {if (error = BMK_SEARCH_NO_ERROR) {// processing normal results here // NSLog (@ "success: % @", poiResultList. poiInfoList); [poiResultList. poiInfoList enumerateObjectsUsingBlock: ^ (BMKPoiInfo * _ Nonnull obj, NSUInteger idx, BOOL * _ Nonnull stop) {// NSLog (@ "% @ ---- % @", obj. name, obj. address); // because 10 entries are specified for each page during retrieval, 10 related information is retrieved here [self addAnnoWithPT: obj.pt andTitle: obj. name andAddress: obj. address];} else if (error = BMK_SEARCH_AMBIGUOUS_KEYWORD) {// when no result is found in the Set city but in other cities, it is recommended to retrieve the city list for callback // result. cityList; NSLog (@ "ambiguous start point");} else {NSLog (@ "sorry, no result found, % zd", error );}}

 Step 4: run the program, and you will be able to retrieve the notes related to snacks nearby.

Note: header files to be introduced

# Import <baidumapi_map/BMKMapComponent. h> // introduce all header files of the map function # import <baidumapi_search/BMKSearchComponent. h> // introduce all header files of the search function # import <BaiduMapAPI_Location/BMKLocationComponent. h> // introduce all header files of the positioning function