Question

我正在创建一个按钮，将一个引脚放在用户的当前位置。但是当我按下它时，而不是放在非洲周围的全球地图中间，我相信这是因为在原始教程中我得到了这个，他们创建了一个带有“ didUpdateUserLocation “但是我可以想办法将这个添加到IBAction中，这就是我正在使用的东西。有没有人遇到过这个问题？

这是放大代码，但请注意 didUpdateUserLocation 向下vvvv

-(void)mapView: (MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation 
     MKCoordinate region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate,   
     800,800);
    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:NO];
}

`

现在，这里是IBAction，当点击时，在非洲或全球地图的中心放下针脚。我认为这是因为它缺少 didUpdateUserLocation

-(IBAction)addAnnotation; 
{
   MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate,   
     800,800);
    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:NO];

   MKPointAnnotation *point = [[MKPointAnnotation Alloc] init];
   point.coordinate = myLocation.coordinate;
   point.title = @"Test";
   point.subtitle = @"Text";
   [self.mapView addAnnotation:point];
}

因此，如果有人知道如何，我认为是解决方案，didUpdateUserLocation到IBAction，请让我知道，欣赏它！

Answer 1

试试这个......

- (void)mapView:(MKMapView *)aMapView didUpdateUserLocation:(MKUserLocation *)aUserLocation
{
    MKCoordinateRegion region;

    CLLocationCoordinate2D location;
    location.latitude = aUserLocation.coordinate.latitude;
    location.longitude = aUserLocation.coordinate.longitude;

    region.span = aMapView.region.span;
    region.center = location;
    [self.objMapView setRegion:region animated:FALSE];

    showCurrentLoc = FALSE;
}

-(IBAction)addAnnotation;
{
    MKCoordinateRegion region;
    region.span = self.mapView.region.span;
    region.center = location;
    [self.mapView setRegion:region animated:FALSE];

    MKPointAnnotation *point = [[MKPointAnnotation Alloc] init];
    point.coordinate = self.mapView.userLocation.coordinate;
    point.title = @"Test";
    point.subtitle = @"Text";
    [self.mapView addAnnotation:point];
}

添加一个drop pin按钮

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