Trigger MKAnnotationView Callout bubble

[seymores]

Hi,

I'm trying to display the callout bubble when a pin is dropped onto the map.
I looked into the docs and I see there's setSelected:animated: method.

But that won't call out the bubble.

How do I trigger the callout bubble of the pin?

[zaplitny]

Not sure I understood correctly but may be setCanShowCallout of MKAnnotationView is the thing you need

[seymores]

My code looks something like the below. Using setCanShowCallout:YES doesn't do it.

  
   [annView setCanShowCallout:YES];
   [annView setSelected:YES animated:YES];

I need the callout bubble to show without the user tapping on the pin. Basically, once I add the pin to the map, the callout bubble should be displayed.

Is this possible with SDK 3.0?

Originally Posted by zaplitny

Not sure I understood correctly but may be setCanShowCallout of MKAnnotationView is the thing you need

[seymores]

To those who is following, the answer is here:
How to trigger MKAnnotationView's callout view without touching the pin? - Stack Overflow

Originally Posted by seymores

My code looks something like the below. Using setCanShowCallout:YES doesn't do it.

  
   [annView setCanShowCallout:YES];
   [annView setSelected:YES animated:YES];

I need the callout bubble to show without the user tapping on the pin. Basically, once I add the pin to the map, the callout bubble should be displayed.

Is this possible with SDK 3.0?

[hicatchme]

Originally Posted by seymores

To those who is following, the answer is here:
How to trigger MKAnnotationView's callout view without touching the pin? - Stack Overflow

Ok, here's there solution to this problem.

To display the callout use MKMapView#selectAnnotation:animated method.

[hemalimojidra]

It is posibale with

///////////////////////////////////////////////

CLLocation *myPlaceLocation = [[CLLocation alloc] initWithLatitude:23.7899 longitude:75.890];
MyPlaceMark *myPlaceMark = [[MyPlaceMark alloc] initWithCoordinate:[myPlaceLocation coordinate]];
[myPlaceMark setAnootationTitle:@"My Place Mark"];
[myPlaceMark setAnootationSubTitle:@"My Place Mark"];
[myMapView addAnnotation:myPlaceMark];
//myMapView is instance of MKMapView class
[myMapView setCenterCoordinate:myPlaceLocation.coordinate animated:YES];
[myMapView setSelectedAnnotations:[[NSArray alloc] initWithObjects:myPlaceMark,nil]];


//////////////////////////////////////

Thanks,
Hemali Mojidra
Virtueinfo, Ahmedabad

[slackwar]

Originally Posted by hemalimojidra

It is posibale with

///////////////////////////////////////////////

CLLocation *myPlaceLocation = [[CLLocation alloc] initWithLatitude:23.7899 longitude:75.890];
MyPlaceMark *myPlaceMark = [[MyPlaceMark alloc] initWithCoordinate:[myPlaceLocation coordinate]];
[myPlaceMark setAnootationTitle:@"My Place Mark"];
[myPlaceMark setAnootationSubTitle:@"My Place Mark"];
[myMapView addAnnotation:myPlaceMark];
//myMapView is instance of MKMapView class
[myMapView setCenterCoordinate:myPlaceLocation.coordinate animated:YES];
[myMapView setSelectedAnnotations:[[NSArray alloc] initWithObjects:myPlaceMark,nil]];


//////////////////////////////////////

Thanks,
Hemali Mojidra
Virtueinfo, Ahmedabad

When I use this method, it doesn't display annotation view without tapping a pin. Am I missing something?

For your reference, here goes my sample code.

- (void)viewDidLoad {
    [super viewDidLoad];
	mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
	mapView.mapType = MKMapTypeStandard;
	mapView.delegate = self;
	[self.view addSubview:mapView];
	
	myPlaceLocation = [[CLLocation alloc] initWithLatitude:23.7899 longitude:75.890];
	myPlaceMark = [[MyLocation alloc] init];
	[myPlaceMark setCoordinate:[myPlaceLocation coordinate]];
	[myPlaceMark setTitle:@"My Place Mark"];
	[myPlaceMark setSubtitle:@"My Place Mark"];
	
	[mapView addAnnotation:myPlaceMark];
	//myMapView is instance of MKMapView class 
	[mapView setCenterCoordinate:myPlaceLocation.coordinate animated:YES];
	[mapView setSelectedAnnotations:[[NSArray alloc] initWithObjects:myPlaceMark,nil]];
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
	MKPinAnnotationView *annView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"sample"];
	
	annView.canShowCallout = YES;
	
	return annView;
}

[shibq]

Although [mapView selectAnnotation:currentAnnotation animated:FALSE] is the solution, but there is a catch to get it work consistently:

the code

for (id currentAnnotation in mapView.annotations) {
if ([currentAnnotation isEqual:annotationToSelect]) { [mapView selectAnnotation:currentAnnotation animated:FALSE]; } }

should be called from - (void)mapViewDidFinishLoadingMapMKMapView *)mapView, and nowhere else.

The underlying reason is a bit tricky:
The sequence in which the various methods like viewWillAppear, viewDidAppear of UIViewController and the - (void)mapViewDidFinishLoadingMapMKMapView *)mapView is called is different between the first time the map is loaded with one particular location and the subsequent times the map is displayed with the same location.

[loopyfrogger]

Originally Posted by shibq

Although [mapView selectAnnotation:currentAnnotation animated:FALSE] is the solution, but there is a catch to get it work consistently:

the code

for (id currentAnnotation in mapView.annotations) {
if ([currentAnnotation isEqual:annotationToSelect]) { [mapView selectAnnotation:currentAnnotation animated:FALSE]; } }

should be called from - (void)mapViewDidFinishLoadingMapMKMapView *)mapView, and nowhere else.

The underlying reason is a bit tricky:
The sequence in which the various methods like viewWillAppear, viewDidAppear of UIViewController and the - (void)mapViewDidFinishLoadingMapMKMapView *)mapView is called is different between the first time the map is loaded with one particular location and the subsequent times the map is displayed with the same location.

I am using XCODE 3.1.4 with the 3.1.2 SDK and I found that I had to put this in both the mapViewDidFinishLoadingMap and in viewWillAppear in my map view controller class in order for it to work reliably. As you indicated, the order that methods are called for the first time is different for subsequent calls for the same location according to my code traces. I really appreciate the information provided here as I was unable to find it anywhere else.