how to add custom callout view in mapview - iphone

Question

I am new to mapkit in objective-c. I am able to add custom annotation in mapview.
i need to place custom callout view like below image
.
But i didn't get how can i design callout view like this.
i know i need to add callout in view for annotation method.
- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *AnnotationViewID = #"annotationViewID";
MKAnnotationView *annotationView = (MKAnnotationView *)[mapview dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];
if (annotationView == nil)
{
annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
}
annotationView.image = [UIImage imageNamed:#"blue_without_pin.png"];
annotationView.annotation = annotation;
return annotationView;
}

Answer 1

Basically what you want to do is add a new custom view by implementing the following method in your MKMapViewDelegate instance :
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
CGPoint annotationCenter = [mapView convertCoordinate:view.annotation.coordinate toPointToView:mapView];
[self displayCustomCalloutForAnnotation:view.annotation center:annotationCenter];
}

Answer 2

#interface CustomAnnotaionView : MKAnnotationView
#property (strong, nonatomic) UIView *calloutView;
-(void)setSelected:(BOOL)selected animated:(BOOL)animated;
#end
#implementation CustomAnnotaionView
#synthesize calloutView = _calloutView;
-(void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
if(selected)
{
[self.calloutView setFrame:CGRectMake(30, 130, 250, 135)];
[self.calloutView sizeToFit];
self.calloutView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"popup.png"]];
[self addSubview:self.calloutView];
}
else
{
[self.calloutView removeFromSuperview];
}
}
-(void)didAddSubview:(UIView *)subview
{
if([[[subview class]description]isEqualToString:#"UICalloutView"])
{
[subview removeFromSuperview];
}
}
Use this customAnnotationView class in MapView delegate method,
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id
<MKAnnotation>)annotation
{
if([annotation isKindOfClass:[MapAnnotation class]])
{
CustomAnnotationView *annotationView = (CustomAnnotaionView*)[theMapView dequeueReusableAnnotationViewWithIdentifier:#"CustomAnnotationView"];
if(!annotationView)
{
MapAnnotation *annotation = (MapAnnotation *)annotation;
annotationView = [[CustomAnnotaionView alloc]initWithAnnotation:annotation reuseIdentifier:#"CustomAnnotationView"];
[annotationView setCanShowCallout:YES];
}
else
annotationView.annotation = annotation;
return annotationView;
}
return nil;
}

Answer 3

One solution for this would be to detect the exact coordinate of the annotation selected relative to the parent UIView and then drawing a UIView directly on top of the MKMapView.
Here's a snippet that might help:
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
CGPoint pointInMap = [self.mapView convertCoordinate:buildingAnnotation.coordinate
toPointToView:self.view];
// Hide the default callout generated by MKMapView
[mapView deselectAnnotation:view.annotation animated:NO];
// Create a custom callout view and center the arrow on the pointInMap CGPoint
}

Answer 4

You must implement a callout view yourself, and use
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
this delegate to make the callout view showing at right place,
IOS have not any method to custom callout view yet