将UIButton固定到MapView

Question

I make a UIButton over an annotationView like this below:

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
CGPoint point = [mainMapView convertCoordinate:sac.coordinate toPointToView:self.smallView];
button.frame = CGRectMake(point.x - 30, point.y - 30, 60, 60);

It works great, but when I move the map, the buttons do not move with the map. Is there a way to draw the button with a CGRectMake that puts the button.frame on the map instead of the view?

Answer 1

You really should use The MKMapAnnotation stuff to accomplish that. this link walks you through the basics of setting up the delegates needed. Basically all work to keep the button in a location has been done for you--you just have to take advantage of it. This class reference shows how you can set an image for your overlay view and various other things.