CODEWITHSUNDEEP
iphonemkmapview
Dani
Dani

Reputation: 1288

MKMapView (annotations & locations) - iPhone development

How can I determine the coordinates of a certain spot? How can I create a pin for 1 specific location after knowing it's coordinates? Is creating a new class for that necessary?

ex- PIN to : latitude = 37.786996; longitude = -122.440100;

Upvotes: 1

Views: 1629

Answers (2)

user467105
user467105

Reputation:

To add a basic pin at a given coordinate, the simplest way in iOS 4+ is to use the pre-defined MKPointAnnotation class (no need to define your own class) and call addAnnotation:.

If you need to define your own annotation class because you need some custom properties, don't use the classes shown in the MapCallouts sample app as a basis. They give the false impression that you need to define a separate class for each unique coordinate. Instead, create a class that implements the MKAnnotation protocol but with a settable coordinate property.

Edit:
An example with MKPointAnnotation:

MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
annotation.coordinate = CLLocationCoordinate2DMake(33, 35);
annotation.title = @"Title";
annotation.subtitle = @"Subtitle";
[mapView addAnnotation:annotation];
[annotation release];

If you need to easily access the annotation in other methods in the class, you can make it an ivar instead.

Upvotes: 2

Joris
Joris

Reputation: 6286

You implement an object that supports the MKMapAnnotation protocol. This object you add to your mkmapview with the "addAnnotation:" call. This will give you the default pin on the map.

If you want to customize the pin you need to implement the MKMapViewDelegate protocol to return an MKAnnotationView with a custom image.

Upvotes: 0

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