2、进行线路导航
- (void)viewDidLoad { [super viewDidLoad]; //地图初始化设置 mapView =[[MKMapView alloc]initWithFrame:self.view.frame]; mapView.region=MKCoordinateRegionMake(CLLocationCoordinate2DMake(39.26, 116.3), MKCoordinateSpanMake(5, 5)); mapView.mapType=MKMapTypeStandard; mapView.delegate=self; [self.view addSubview:mapView]; //导航设置 CLLocationCoordinate2D fromcoor=CLLocationCoordinate2DMake(39.26, 116.3); CLLocationCoordinate2D tocoor = CLLocationCoordinate2DMake(33.33, 113.33); //创建出发点和目的点信息 MKPlacemark *fromPlace = [[MKPlacemark alloc] initWithCoordinate:fromcoor addressDictionary:nil]; MKPlacemark *toPlace = [[MKPlacemark alloc]initWithCoordinate:tocoor addressDictionary:nil]; //创建出发节点和目的地节点 MKMapItem * fromItem = [[MKMapItem alloc]initWithPlacemark:fromPlace]; MKMapItem * toItem = [[MKMapItem alloc]initWithPlacemark:toPlace]; //初始化导航搜索请求 MKDirectionsRequest *request = [[MKDirectionsRequest alloc]init]; request.source=fromItem; request.destination=toItem; request.requestsAlternateRoutes=YES; //初始化请求检索 MKDirections *directions = [[MKDirections alloc]initWithRequest:request]; //开始检索，结果会返回在block中 [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) { if (error) { NSLog(@"error:%@",error); }else{ //提取导航线路结果中的一条线路 MKRoute *route =response.routes[0]; //将线路中的每一步详情提取出来 NSArray * stepArray = [NSArray arrayWithArray:route.steps]; //进行遍历 for (int i=0; i<stepArray.count; i++) { //线路的详情节点 MKRouteStep * step = stepArray[i]; //在此节点处添加一个大头针 MKPointAnnotation * point = [[MKPointAnnotation alloc]init]; point.coordinate=step.polyline.coordinate; point.title=step.instructions; point.subtitle=step.notice; [mapView addAnnotation:point]; //将此段线路添加到地图上 [mapView addOverlay:step.polyline]; } } }]; } //地图覆盖物的代理方法 -(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay{ MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay]; renderer.strokeColor = [UIColor redColor]; renderer.lineWidth = 4.0; return renderer; } //标注的代理方法 -(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{ MKPinAnnotationView * view= [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"anno"]; view.canShowCallout=YES; return view; }
效果如下：
二、附近兴趣点检索
兴趣点检索的逻辑和导航线路检索的逻辑相似，直接通过代码来演示：
//创建一个位置信息对象，第一个参数为经纬度，第二个为纬度检索范围，单位为米，第三个为经度检索范围，单位为米 MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(tocoor, 5000, 5000); //初始化一个检索请求对象 MKLocalSearchRequest * req = [[MKLocalSearchRequest alloc]init]; //设置检索参数 req.region=region; //兴趣点关键字 req.naturalLanguageQuery=@"hotal"; //初始化检索 MKLocalSearch * ser = [[MKLocalSearch alloc]initWithRequest:req]; //开始检索，结果返回在block中 [ser startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error) { //兴趣点节点数组 NSArray * array = [NSArray arrayWithArray:response.mapItems]; for (int i=0; i<array.count; i++) { MKMapItem * item=array[i]; MKPointAnnotation * point = [[MKPointAnnotation alloc]init]; point.title=item.name; point.subtitle=item.phoneNumber; point.coordinate=item.placemark.coordinate; [mapView addAnnotation:point]; } }];
效果如下：
