mkmapview显示指定框架中的路线和注释

Question

我使用下面的方法显示mkmapview中的注释和路线，但它仅显示mkmapview中的注释，并未在地图视图的边界中显示完整路线 任何人都可以提出我需要哪些修改为了正确显示一切。

由于

- (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]; 
} 

当我施加它，它示出了该结果。

Answer 1

这应该工作

-(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]; 
}