的MKMapView：獲取lattitude和經度，當用戶移動地圖

Question

我'新iPhone MapView類，當用戶移動地圖我需要得到可見光區域的經度和緯度iphone

Answer 1

您可以使用MKMapView的屬性獲取地圖中心點的座標： centerCoordinate.latitude和centerCoordinate.longitude。

例如：

CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(
       map.centerCoordinate.latitude, map.centerCoordinate.longitude); 

這是論文緯度和你所說的「當用戶移動地圖我需要的經度和緯度」是指東經？

希望這有助於...

Answer 2

使用的.region財產你的MKMapView。

MKMapView *myMapView = [[MKMapView alloc] initWithFrame:...]; 

MKCoordinateRegion region = myMapView.region; 

// Center of the screen as lat/long 
// region.center.latitude 
// region.center.longitude 

// width and height of viewing area as lat/long 
// region.span.latitudeDelta 
// region.span.longitudeDelta 

最大

Answer 3

在Appdelegate.h

CLLocationManager *locationManager; 

添加這個，然後在添加這些行你Appdelegate.m (didFinishLaunchingWithOptions)

locationManager = [[CLLocationManager alloc] init]; 
locationManager.delegate = self; 
locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
[locationManager startMonitoringSignificantLocationChanges]; 
[locationManager startUpdatingLocation]; 

這將調用一個方法，當你用設備移動，

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations 
{ 
    CLLocation *currentLocation = [locations lastObject]; 

    NSString *latitude = [NSString stringWithFormat:@"%g", currentLocation.coordinate.latitude]; 
    NSString *longitude = [NSString stringWithFormat:@"%g", currentLocation.coordinate.longitude]; 

    NSMutableArray *temp = [[NSMutableArray alloc] initWithCapacity:0]; 
    [temp addObject:latitude]; 
    [temp addObject:longitude]; 

    NSUserDefaults *def = [NSUserDefaults standardUserDefaults]; 
    [def setObject:temp forKey:@"CLocation"]; 

    [temp release]; 
} 

從此使用。