ios - How to remove an annotation from a map view gently? -

i'm adding , removing annotations map view. when remove 1 disappears abruptly , looks bit startling, i'd rather faded away gracefully.

i tried removing uiview:animatewithduration: wasn't animatable attribute.

if there's no other easy solution thinking annotation view fade alpha , remove annotation map. problem doesn't seem annotation view has reference map view? adding 1 starts bit messy. there easy quick solution removing annotation gracefully?

using animatewithduration should work fine. fade removal of annotation, 1 can:

mkannotationview *view = [self.mapview viewforannotation:annotation];  if (view) {     [uiview animatewithduration:0.5 delay:0.0 options:0 animations:^{         view.alpha = 0.0;     } completion:^(bool finished) {         [self.mapview removeannotation:annotation];         view.alpha = 1.0;   // remember set alpha 1.0 because annotation view can reused later     }]; } else {     [self.mapview removeannotation:annotation]; }