地図を表示して場所を表示したい。コードは正常に実行されていますが、場所を地図に表示できませんでした。どうやったらよいかわかりません。
ここに私のクラスがあります:
ViewController.h
@interface ViewController :
UIViewController<AGSMapViewLayerDelegate,CLLocationManagerDelegate>
{
AGSMapView *_mapView;
AGSGraphicsLayer *_graphicsLayer;
AGSTiledMapServiceLayer *_tiledLayer;
CLLocationManager *locationManager;
CLLocation *startingPoint;
}
@property (nonatomic,retain) IBOutlet AGSMapView *mapView;
@property (nonatomic, retain) AGSTiledMapServiceLayer *tiledLayer;
@property (nonatomic, retain) CLLocationManager *locationManager;
@property (nonatomic, retain) AGSGraphicsLayer *graphicsLayer;
@property (nonatomic, retain) CLLocation *startingPoint;
ViewController.m
@interface ViewController()
@end
@implementation ViewController
@synthesize mapView = _mapView;
@synthesize graphicsLayer = _graphicsLayer;
@synthesize tiledLayer = _tiledLayer;
@synthesize locationManager;
@synthesize startingPoint;
- (void)viewDidLoad
{
[super viewDidLoad];
self.mapView.layerDelegate =self;
self.graphicsLayer = [AGSGraphicsLayer graphicsLayer];
[self.mapView addMapLayer:self.graphicsLayer withName:@"graphicsLayer"];
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self; // send loc updates to myself
self.locationManager.distanceFilter = 1000.0f; // 1 kilometer
self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
}
- (void)mapViewDidLoad:(AGSMapView *)mapView{
[self.locationManager startUpdatingLocation]; //启用位置监控
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
self.startingPoint = [locations lastObject];
[self.locationManager stopUpdatingLocation]; //获取位置信息
CGPoint coord;
coord.x = startingPoint.coordinate.longitude;
coord.y = startingPoint.coordinate.latitude;
//将坐标用AGSPoint来表示
AGSPoint *mappoint = [[AGSPoint alloc]initWithX:coord.x y:coord.y spatialReference:nil];
//[self.graphicsLayer removeAllGraphics];
AGSPictureMarkerSymbol *pt;
pt = [AGSPictureMarkerSymbol pictureMarkerSymbolWithImageNamed:@"LocationDisplay.png"];
AGSGraphic *LocationDisplay = [[AGSGraphic alloc] initWithGeometry:mappoint symbol:pt attributes:nil infoTemplateDelegate:nil];
// 添加要素到GraphicsLayer
[self.graphicsLayer addGraphic:LocationDisplay];
[self.graphicsLayer refresh];
//漫游到指定级别
[self.mapView centerAtPoint:mappoint animated:YES];
int levelToZoomTo = 12;
AGSLOD* lod = [self.tiledLayer.mapServiceInfo.tileInfo.lods objectAtIndex:levelToZoomTo];
float zoomFactor = lod.resolution/self.mapView.resolution;
AGSMutableEnvelope *newEnv = [AGSMutableEnvelope envelopeWithXmin:self.mapView.visibleAreaEnvelope.xmin
ymin:self.mapView.visibleAreaEnvelope.ymin
xmax:self.mapView.visibleAreaEnvelope.xmax
ymax:self.mapView.visibleAreaEnvelope.ymax
spatialReference:self.mapView.spatialReference];
[newEnv expandByFactor:zoomFactor];
[self.mapView zoomToEnvelope:newEnv animated:YES];
}