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iphoneiosxcodemkoverlay

Sending 'MKOverlayView to parameter of incompatible type 'id<MKOverlay>'

I'm getting the following warning when adding overlays to my map view:

Sending 'MKOverlayView *const __strong' to parameter of incompatible type 'id<MKOverlay>'

The code works great, and the overlays are drawn as they should, but I would love to get rid of the warning. The code that's causing it:

for(MKOverlayView *overlay in [mapView overlays]) {
    [mapView removeOverlay:overlay];
}

(Obviously, the line inside the for loop is what's raising this error) Google doesn't have a single result for that error. only similar with MKAnnotationView for example. The solutions there (for example):

for(id<MKOverlay> *overlay in [mapView overlays]) {
    [mapView removeOverlay:overlay];
}

raises an error.

Any ideas? Thanks!

Solution

  • The overlays property returns an array of the overlay model objects (the objects that conform to the MKOverlay protocol) and not the overlay views.

    So change the for-loop to:

    for(id<MKOverlay> overlay in [mapView overlays]) {

    Note there is no asterisk in the id<MKOverlay> overlay part.