MkMapView：当用户移动地图时获取纬度和经度

Question

我是iphone MapView的新用户，当用户移动地图时我需要获取iphone中可见区域的纬度和经度

Answer 1

您可以使用MKMapView的属性获取地图中心点的坐标： centerCoordinate.latitude和centerCoordinate.longitude。

例如：

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

这就是你所说的经纬度和经度“我需要用户移动地图时的纬度和经度”？

希望这会有所帮助......

Answer 2

使用MKMapView的.region属性。

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

最高

Answer 3

在Appdelegate.h

中添加此内容

CLLocationManager *locationManager;

然后在Appdelegate.m (didFinishLaunchingWithOptions)

中添加这些行

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

当您使用设备移动时，这将调用方法

- (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];
}

从中使用。