mkmapview 在指定帧中显示路线和注释

Question

我正在使用以下方法在 mkmapview 中显示注释和路线，但它在我的 mkmapview 中仅显示注释，而没有在地图视图的边界中显示完整路线谁能建议我需要做哪些修改才能正确显示所有内容。

谢谢

 - (void)zoomAnnotationsOnMapView:(MKMapView *)mapView toFrame:(CGRect)annotationsFrame animated:(BOOL)animated
{
    NSArray *annotations = mapView.annotations;
    int count = (int)[mapView.annotations count];
    if ( count == 0) { return; } //bail if no annotations

    //convert NSArray of id <MKAnnotation> into an MKCoordinateRegion that can be used to set the map size
    //can't use NSArray with MKMapPoint because MKMapPoint is not an id
    MKMapPoint points[count]; //C array of MKMapPoint struct
    for( int i=0; i<count; i++ ) //load points C array by converting coordinates to points
    {
        CLLocationCoordinate2D coordinate = [(id <MKAnnotation>)[annotations objectAtIndex:i] coordinate];
        points[i] = MKMapPointForCoordinate(coordinate);
    }
    //create MKMapRect from array of MKMapPoint
    MKMapRect mapRect = [[MKPolygon polygonWithPoints:points count:count] boundingMapRect];
    //convert MKCoordinateRegion from MKMapRect
    MKCoordinateRegion region = MKCoordinateRegionForMapRect(mapRect);

    //add padding so pins aren't scrunched on the edges
    region.span.latitudeDelta  *= ANNOTATION_REGION_PAD_FACTOR;
    region.span.longitudeDelta *= ANNOTATION_REGION_PAD_FACTOR;
    //but padding can't be bigger than the world
    if( region.span.latitudeDelta > MAX_DEGREES_ARC ) {
        region.span.latitudeDelta  = MAX_DEGREES_ARC;
    }
    if( region.span.longitudeDelta > MAX_DEGREES_ARC ){
        region.span.longitudeDelta = MAX_DEGREES_ARC;
    }

    //and don't zoom in stupid-close on small samples
    if( region.span.latitudeDelta  < MINIMUM_ZOOM_ARC ) { region.span.latitudeDelta  = MINIMUM_ZOOM_ARC; }
    if( region.span.longitudeDelta < MINIMUM_ZOOM_ARC ) { region.span.longitudeDelta = MINIMUM_ZOOM_ARC; }


    //and if there is a sample of 1 we want the max zoom-in instead of max zoom-out
    if( count == 1 )
    {
        region.span.latitudeDelta = MINIMUM_ZOOM_ARC;
        region.span.longitudeDelta = MINIMUM_ZOOM_ARC;
    }
    [mapView setRegion:region animated:animated];
    [mapView setVisibleMapRect:mapRect edgePadding:UIEdgeInsetsMake(120, 120, 150, 80) animated:YES];
   // [MBProgressHUD hideAllHUDsForView:self.view animated:YES];
}

当我应用它时，它显示了这个结果。

Answer 1

这应该有效

-(void)zoomToDisplayPolyline:(MKMapView*)mapView polyline:(MKPolyline*)polyline animated:(BOOL)animated
{
    [mapView setVisibleMapRect:[polyline boundingMapRect] edgePadding:UIEdgeInsetsMake(10.0, 10.0, 10.0, 10.0) animated:animated];
}

mkmapview 在指定帧中显示路线和注释

mkmapview show route and annotations in a specified frame

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