Modifying annotation should not require removing it and adding it again (iOS)

[futureshape]

Currently, the only way to get the map to show changes in an annotation (especially its image) is is to remove it and add it again i.e.

[self.mapView removeAnnotation:annotation];
[self.mapView addAnnotation:annotation];

This causes flickering (see #1688) but also has the side effect of de-selecting an annotation that was previously selected by the user. There is a workaround for this:

BOOL annotationWasSelected = [self.mapView.selectedAnnotations containsObject:annotation];
[self.mapView removeAnnotation:annotation];
[self.mapView addAnnotation:annotation];
if(annotationWasSelected) [self.mapView selectAnnotation:annotation animated:false];

But ideally it should be possible to modify an annotation is a simpler way.

[1ec5]

Related to #1980, which is about moving the annotation.

[RomainQuidet]

related to #2210
Solved by pull request #3146
Waiting for code review.
annotation will be updated by modifying its annotationImage.image property which is no more read only (based on native MapKit interface)

[1ec5]

This was fixed in #3146 and will be in the next release.

[t-yoshii]

Does #3146 also fix to allow annotation coordinate to be updated?

I want to move annotations without adding/removing to avoid flickering, is it possible?

[1ec5]

Oh you're right, that hasn't been addressed yet.

[jfirebaugh]

#1980 is related / could be considered a duplicate.

[1ec5]

OK, duplicate of #1980.