IOS system map implementation and positioning

IOS system map implementation and positioning

 

1: add the library CoreLocation. framework and MApKit. framework;

2: @ property (nonatomic, strong) CLLocationManager * locationManager;
@ Property (nonatomic, strong) MKMapView * mapView;
@ Property (nonatomic, strong) CLLocation * checkinLocation;
@ Property (strong, nonatomic) NSString * currentLatitude; // latitude
@ Property (strong, nonatomic) NSString * currentlong.pdf; // longitude

-(Void) viewDidLoad {
[Super viewDidLoad];
Self. title = @ "map ";
[Self initRightBarButton];
[Self setupLocationManager];
[Self setupMapView];
}
-(Void) initRightBarButton {
UIButton * _ btnRight = [UIButton buttonWithType: UIButtonTypeCustom];
[_ BtnRight setFrame: CGRectMake (0, 0, 39, 34)];
UIImage * imgNormal = [UIImage imageNamed: @ "gpsbtn_dianji"];
UIImage * imgSelect = [UIImage imageNamed: @ "gpsbtn"];
[_ BtnRight setBackgroundImage: imgNormal forState: UIControlStateNormal];
[_ BtnRight setBackgroundImage: imgSelect forState: UIControlStateSelected];
_ BtnRight. showsTouchWhenHighlighted = YES;
[_ BtnRight addTarget: self action: @ selector (showUserLocation :) forControlEvents: UIControlEventTouchUpInside];
UIBarButtonItem * buttonItem = [[UIBarButtonItem alloc] initWithCustomView: _ btnRight];
Self. navigationItem. rightBarButtonItem = buttonItem;
}
-(Void) setupLocationManager {
_ LocationManager = [[CLLocationManager alloc] init];
_ LocationManager. desiredAccuracy = kCLLocationAccuracyBestForNavigation;
// Locate every several meters (set to any movement here)
_ LocationManager. distanceFilter = kCLDistanceFilterNone;
// After iOS 8.0
If ([self. locationManager respondsToSelector: @ selector (requestWhenInUseAuthorization)]) {
[Self. locationManager requestWhenInUseAuthorization];
[Self. locationManager startUpdatingLocation];
}
}
-(Void) setupMapView {
_ MapView = [[MKMapView alloc] initWithFrame: self. view. bounds];
[Self. view addSubview: _ mapView];
_ MapView. delegate = self;
// User location tracking (user location tracking is used to mark the current user location and the location service is called at this time)
_ MapView. userTrackingMode = MKUserTrackingModeFollowWithHeading;
_ MapView. mapType = MKMapTypeStandard;
[Self initLocationData];
}
-(Void) initLocationData {
NSMutableArray * arr = [[NSMutableArray alloc] init];
For (int I = 0; I <1; I ++ ){
CLLocationDegrees lat = [self. currentLatitude doubleValue];
CLLocationDegrees longi = [self. currentlong1_doublevalue];
NSString * lacationName = @ "current location ";
BasicMapAnnotation * anno = [[BasicMapAnnotation alloc] initWithLatitude: lat andlongpolling: longi];
Anno. title = lacationName;
Anno. index = I;
[Arr addObject: anno];
}
[_ MapView showAnnotations: arr animated: YES];
}
-(Void) showUserLocation :( id) sender {
MKCoordinateSpan span = MKCoordinateSpanMake (0.01, 0.02 );
MKCoordinateRegion region = MKCoordinateRegionMake (_ mapView. userLocation. coordinate, span );
[_ MapView setRegion: region animated: YES];
}
-(Void) mapView :( MKMapView *) mapView didUpdateUserLocation :( MKUserLocation *) userLocation {
NSLog (@ "latitude: % f longitude: % f", userLocation. location. coordinate. latitude, userLocation. location. coordinate. longpolling );
Self. currentLatitude = [NSString stringWithFormat: @ "%. 4f", userLocation. location. coordinate. latitude];
Self. currentlongpolling = [NSString stringWithFormat: @ "%. 4f", userLocation. location. coordinate. longpolling];
[Self initLocationData];
// Set the map display range (if you do not set the region, the area range is automatically displayed and the current user location is the map center point)
// MKCoordinateSpan span = MKCoordinateSpanMake (0.01, 0.01 );
// MKCoordinateRegion region = MKCoordinateRegionMake (_ mapView. region. center, span );
// [_ MapView setRegion: region animated: true];
}
-(MKAnnotationView *) mapView :( MKMapView *) mapView viewForAnnotation :( id ) Annotation {
If ([annotation isKindOfClass: [BasicMapAnnotation class]) {
Static NSString * key = @ "AnnotationKey ";
MKAnnotationView * annotationView = [_ mapView dequeueReusableAnnotationViewWithIdentifier: key];
BasicMapAnnotation * aa = (BasicMapAnnotation *) annotation;
If (! AnnotationView ){
AnnotationView = [[MKAnnotationView alloc] initWithAnnotation: aa reuseIdentifier: key];
CGRect frame = annotationView. frame;
Frame. size. width = 14;
Frame. size. height = 35;
AnnotationView. frame = frame;
AnnotationView. canShowCallout = YES;
UIImageView * imageview = [[UIImageView alloc] initWithImage: [UIImage imageNamed: @ "map annotation"];
Imageview. frame = frame;
[AnnotationView addSubview: imageview];
}
Return annotationView;
}
Return nil;
}
-(Void) didReceiveMemoryWarning {
[Super didReceiveMemoryWarning];
}