我正在使用 MKMapView
在 iPhone 中创建 map 应用程序.
我确实成功找到了我的 current location
和 zoom
在这一点上是这样的:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.mapView.delegate = self;
self.locationManager = [[CLLocationManager alloc] init];
[locationManager setDelegate:self];
[locationManager setDistanceFilter:kCLDistanceFilterNone];
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
[self.mapView setShowsUserLocation:YES];
}
-(void) mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views
{
MKAnnotationView *annotationView = [views objectAtIndex:0];
id<MKAnnotation> mp = [annotationView annotation];
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance([mp coordinate], 1550, 1550);
[self.mapView setRegion:region animated:YES];
}
我要解决的问题是:
我有一个 location
在 map
上(此代码在 viewDidLoad
中):
CLLocationCoordinate2D location = [self getLocationFromAddressString:@"San Francisco, CA, United States"];
// location.latitude = 37.78608;
// location.longitude = -122.407398;
MapViewAnnotation *mapAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"Store location" coordinate:location];
[self.mapView addAnnotation:mapAnnotation];
这是mapViewAnnotation:
@implementation MapViewAnnotation
@synthesize title = _title;
@synthesize coordinate = _coordinate;
- (id) initWithTitle:(NSString *) t coordinate:(CLLocationCoordinate2D) c {
self = [super init];
if(self) {
_title = t;
_coordinate = c;
}
return self;
}
@end
我想要一个合适的 zoomLevel
和 mapCenter
为此 location
和我的 current location
.
我可以在 Android 中使用 MapController.zoomToSpan()
成功地做到这一点.如何在 iPhone map 中修复它?
最佳答案
创建位置数组,然后使用所有 AnnotationPins 创建中心 map View
-(void) RoutscenterMap
{
MKCoordinateRegion region;
CLLocationDegrees maxLat = -90;
CLLocationDegrees maxLon = -180;
CLLocationDegrees minLat = 90;
CLLocationDegrees minLon = 180;
for(int idx = 0; idx < arrLocation.count; idx++)// here use your array or points
{
CLLocation* currentLocation = [arrLocation objectAtIndex:idx];
if(currentLocation.coordinate.latitude > maxLat)
maxLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.latitude < minLat)
minLat = currentLocation.coordinate.latitude;
if(currentLocation.coordinate.longitude > maxLon)
maxLon = currentLocation.coordinate.longitude;
if(currentLocation.coordinate.longitude < minLon)
minLon = currentLocation.coordinate.longitude;
}
region.center.latitude = (maxLat + minLat) / 2;
region.center.longitude = (maxLon + minLon) / 2;
region.span.latitudeDelta = (maxLat - minLat) * 2;
region.span.longitudeDelta = (maxLon - minLon) * 2;
[mapView setRegion:region animated:YES];
}
你也可以像下面这样在数组中添加位置......
CLLocation *temploc=[[CLLocation alloc]initWithLatitude:latitude longitude:longtitude];
[arrLocation addObject:temploc];
之后使用这个数组使 map 居中
希望对你有帮助...
:)
关于iphone - MKMapView 中的 zoomLevel 和 mapCenter,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12727520/