IOS uses CoreLocation and MapKit to develop and search for nearby mall functions, corelocationmapkit
The Code is as follows:
//
// SearchNearbyShopViewController. m
// SearchNearbyShop
//
// Created by Linzhixiao on 16/2/14.
// Copyright©2016 B5m. All rights reserved.
//
# Import "SearchNearbyShopViewController. h"
# Import <CoreLocation/CoreLocation. h>
# Import <MapKit/MapKit. h>
# Define KSearchAreaMeters 100
@ Interface SearchNearbyShopViewController () <CLLocationManagerDelegate, MKMapViewDelegate>
{
MKCoordinateRegion currentRegion;
}
@ Property (nonatomic, strong) CLLocationManager * locationManager;
@ Property (nonatomic, strong) MKMapView * mapView;
@ Property (nonatomic, strong) CLGeocoder * geocoder;
@ Property (nonatomic, strong) NSMutableArray * nearbyInfoArray;
@ End
@ Implementation SearchNearbyShopViewController
-(Void) viewDidLoad {
[Super viewDidLoad];
Self. title = @ "Search for malls nearby ";
Self. view. backgroundColor = [UIColor whiteColor];
[Self configNavigation];
[Self locationManager];
[Self requestLocationAutoorize];
[Self GetCurrentLocation];
[Self geocoder];
[Self. view addSubview: self. mapView];
}
-(Void) didReceiveMemoryWarning {
[Super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
# Pragma mark-Custom Accessors
-(CLLocationManager *) locationManager {
If (! _ LocationManager ){
_ LocationManager = [[CLLocationManager alloc] init];
_ LocationManager. delegate = self;
}
Return _ locationManager;
}
-(MKMapView *) mapView {
If (! _ MapView ){
_ MapView = [[MKMapView alloc] initWithFrame: self. view. bounds];
_ MapView. mapType = MKMapTypeStandard;
_ MapView. userTrackingMode = MKUserTrackingModeFollow;
_ MapView. delegate = self;
}
Return _ mapView;
}
-(CLGeocoder *) geocoder {
If (! _ Geocoder ){
_ Geocoder = [[CLGeocoder alloc] init];} return _ geocoder;} # pragma mark-Private-(void) configNavigation {UIButton * topSearchButton = [UIButton buttonWithType: callback]; topSearchButton. frame = CGRectMake (0, 0, 50, 50); [topSearchButton setTitle: @ "Search" forState: UIControlStateNormal]; [topSearchButton addTarget: self action: @ selector (searchNearbyShopAction :) forControlEvents: UIControlEvent TouchUpInside]; UIBarButtonItem * rightButtonItem = [[UIBarButtonItem alloc] initWithCustomView: topSearchButton]; self. navigationItem. rightBarButtonItem = rightButtonItem;}-(void) requestLocationAutoorize {CGFloat systemVersion = [[UIDevice currentDevice]. systemVersion floatValue]; if (systemVersion> = 8) {[_ locationManager requestAlwaysAuthorization]; }}- (void) GetCurrentLocation {if ([CLLocati OnManager locationServicesEnabled]) {NSLog (@ "enabled"); [_ locationManager startUpdatingLocation]; self. locationManager. distanceFilter = kCLDistanceFilterNone;} else {NSLog (@ "the positioning function cannot be enabled") ;}- (void) searchNearbyShopWithRegion: (MKCoordinateRegion) region {// obtain nearby information self. nearbyInfoArray = [NSMutableArray array]; MKLocalSearchRequest * request = [[MKLocalSearchRequest alloc] init]; request. region = Region; request. principal = @ "school"; MKLocalSearch * localSearch = [[MKLocalSearch alloc] initWithRequest: request]; [localSearch startWithCompletionHandler: ^ (MKLocalSearchResponse * _ Nullable response, NSError * _ Nullable error) {if (! Error) {[self. nearbyInfoArray addObjectsFromArray: response. mapItems]; for (MKMapItem * item in _ nearbyInfoArray) {NSLog (@ "name = % @,", item. name) ;}} else {NSLog (@ "Search error, % @", error) ;}}] ;}# pragma mark-IBActions-(void) searchNearbyShopAction: (UIButton *) searchButton {NSLog (@ "re-search for nearby malls"); if (currentRegion. span. latitudeDelta = 0.0) {return;} else {[self searchNearbyShopWithRegion: currentRegion] ;}# pragma mark-CLLocationManagerDelegate //-(void) locationManager :( CLLocationManager *) manager // didUpdateLocations :( NSArray <CLLocation *> *) locations {// CLLocation * location = [locations firstObject]; // NSLog (@ "latitude = % f, precision = % f ", location. coordinate. latitude, location. coordinate. longpolling); //} # pragma mark-MKMapViewDelegate-(void) mapView :( MKMapView *) mapView didUpdateUserLocation :( MKUserLocation *) userLocation {[self. geocoder reverseGeocodeLocation: userLocation. location completionHandler: ^ (NSArray <CLPlacemark *> * _ Nullable placemarks, NSError * _ Nullable error) {CLPlacemark * placeMark = [placemarks firstObject]; NSLog (@ "succeeded in obtaining the geographic location name =%@, locality =%@", placeMark. name, placeMark. locality); userLocation. title = placeMark. name; userLocation. subtitle = placeMark. locality;}]; // The current location is displayed in the map CLLocationCoordinate2D center = userLocation. location. coordinate; MKCoordinateSpan span = MKCoordinateSpanMake (0.009310, 0.007812); MKCoordinateRegion region = centers, span); MKCoordinateRegion searchRegion = region (userLocation. coordinate, KSearchAreaMeters, KSearchAreaMeters); currentRegion = searchRegion; [self. mapView setRegion: region animated: YES];} @ end
