要看到那个google的地图,在实现上也相当简便。嵌入地图时需要MKMapView这个类, 它有很多方法和属性,不过如果只是想得到基本的定位功能的话,只需实例化一个对像然后加到当前的 view上就可以了。 <一>先介绍一下,它的几个常用的属性。 region 用来设置地图的那一部份被显示,它是一个结构体,定义如下: typedef struct{ CLLocationCoordinate2D center;//表示显示的中心 MKCoordinateSpan span; //表示比例 }MKCoordinateRegion; 对于MKCoordinateSpan其定义如下: typedef struct{ CLLocationDegrees latitudeDelta;//这类型在前一节中讲过了,是double型的 CLLocationDegrees longitudeDlta; }MKCoordinateSpan; 再看一下maptype属性,它用于设置地图的类型,如下所示: MapType属性值 描述 MKMapTypeStandard 表示标准的街道级地图 MKMapTypeSatellite 表示卫星图 MKMapTypeHybird 表示上面两者的混合 其余的就不再一一介绍了,去看看相关的文档即可,在这里已经可以把地图弄出来了。 <二>下面我们把上一节中的代码改一下: .h头文件 #import <UIKit/UIKit.h> #import <CoreLocation/CoreLocation.h> #import <MapKit/MapKit.h> @interface CoreLocationViewController : UIViewController <CLLocationManagerDelegate,MKMapViewDelegate>{ MKMapView *map; CLLocationManager *locManager; CLLocationCoordinate2D loc; } @property (nonatomic, retain) MKMapView *map; @property (nonatomic, retain) CLLocationManager *locManager; - (void)setCurrentLocation:(CLLocation *)location; @end .m源文件 #import "CoreLocationViewController.h" @implementation CoreLocationViewController @synthesize map; @synthesize locManager; - (void)viewDidLoad { map = [[MKMapView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 411.0f)]; map.showsUserLocation = YES; [self.view addSubview:map]; locManager = [[CLLocationManager alloc] init]; locManager.delegate = self; locManager.desiredAccuracy = kCLLocationAccuracyBest; locManager.distanceFilter = 100; [locManager startUpdatingLocation]; [super viewDidLoad]; } - (void)dealloc { [map release]; [locManager release]; [super dealloc]; } #pragma mark - #pragma mark Core Location Delegate Methods - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { NSLog(@"---------------"); loc = [newLocation coordinate]; MKCoordinateRegion region; MKCoordinateSpan span; span.latitudeDelta=0.1; //zoom level span.longitudeDelta=0.1; //zoom level NSLog(@"%f",loc.latitude); NSLog(@"%f",loc.longitude); region.span=span; region.center=loc; // map.showsUserLocation=NO; map.mapType = MKMapTypeStandard; [map setRegion:region animated:YES]; [map regionThatFits:region]; } - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{ NSString *errorMessage; if ([error code] == kCLErrorDenied){ errorMessage = @"被拒绝访问"; } if ([error code] == kCLErrorLocationUnknown) { errorMessage = @""; } UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:errorMessage delegate:self cancelButtonTitle:@"纭畾" otherButtonTitles:nil]; [alert show]; [alert release]; } - (void)setCurrentLocation:(CLLocation *)location { MKCoordinateRegion region ; region.center = location.coordinate; region.span.longitudeDelta = 0.15f; region.span.latitudeDelta = 0.15f; [map setRegion:region animated:YES]; } @end
原文地址:http://blog.csdn.net/vaercly/article/details/40503713