iOS MKMapView嵌入地圖

標籤：ios mkmapview嵌入地圖

要看到那個google的地圖，在實現上也相當簡便。嵌入地圖時需要MKMapView這個類，它有很多方法和屬性，不過如果只是想得到基本的定位功能的話，只需執行個體化一個對像然後加到當前的view上就可以了。<一>先介紹一下，它的幾個常用的屬性。 region 用來設定地圖的那一部份被顯示，它是一個結構體,定義如下：  typedef struct{          CLLocationCoordinate2D center;//表示顯示的中心          MKCoordinateSpan span;        //表示比例}MKCoordinateRegion;對於MKCoordinateSpan其定義如下：typedef struct{CLLocationDegrees latitudeDelta;//這類型在前一節中講過了，是double型的CLLocationDegrees longitudeDlta;}MKCoordinateSpan;再看一下maptype屬性，它用於設定地圖的類型，如下所示：      MapType屬性值                 描述    MKMapTypeStandard           表示標準的街道級地圖    MKMapTypeSatellite          表示衛星圖    MKMapTypeHybird             表示上面兩者的混合其餘的就不再一一介紹了，去看看相關的文檔即可，在這裡已經可以把地圖弄出來了。<二>下面我們把上一節中的代碼改一下：    .h標頭檔#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源檔案#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 = @"被拒絕訪問";        }        if ([error code] == kCLErrorLocationUnknown) {                errorMessage = @"";        }        UIAlertView *alert = [[UIAlertView alloc]                                                  initWithTitle:nil                                                  message:errorMessage                                                  delegate:self                                                  cancelButtonTitle:@"紜畾"                                                  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

iOS MKMapView嵌入地圖