Pin images change after map type change?

I am just loading a simple map with customize pin images on pin annotations开发者_如何学C. First time it loads the pin images in map correctly. When i change map type the pins are change in their default format.Guys do you have any idea about this problem. Any help will be appreciated.Thanks in advance..

In viewForAnnotation, make sure you are creating a plain MKAnnotationView and not an MKPinAnnotationView.