Why does selectAnnotation not work in this scenario?

Question

I am setting up a MapView annotation when my map view appears with the following code, which all seems to be working fine except the selection:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    MapAnnotation *pinpoint = [[MapAnnotation alloc] initWithTitle:@"Title" andCoordinate:loc];

    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, 1500, 1500);
    [self.mapView setRegion:region animated:true];
    [self.mapView addAnnotation:pinpoint];
    [self.mapView selectAnnotation:pinpoint animated:true];  //nothing happens!?   
}

But if call the same method in this callback, it works fine:

- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views
{
    MKAnnotationView *annotationView = [views objectAtIndex:0];
    id <MKAnnotation> mp = [annotationView annotation];
    [mv selectAnnotation:mp animated:YES];
}

What is causing this? Is this just not the appropriate place to call selectAnnotation? Do I have to wait until after viewForAnnotation has been called?

My solution in other question: http://stackoverflow.com/a/13026353/736384 — Luis Ascorbe, Oct 23 '12 at 08:33

score 2 · Accepted Answer · edited May 23 '17 at 10:34

2

The annotation view has to have been added before you can select the annotation.

Please see this popular question:

How to trigger MKAnnotationView's callout view without touching the pin?

edited May 23 '17 at 10:34

Community

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answered Apr 14 '12 at 22:25

TomSwift

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Why does selectAnnotation not work in this scenario?

1 Answers1