ios - Map Annotations not visible on map -

i'm trying display annotations building entrances on mapkit map in application.

to have created class entranceannotation implementing mkannotation can later implement custom mkannotationview these. purpose of question though i'm experiencing problem when trying solve simple mkpointannotations.

i using custom subclass of mkmapview inside of following code resides.

let entranceannotations: [mkpointannotation] = selectedbuilding.entrances.map {      entrance in     let ann = mkpointannotation()     ann.coordinate = entrance.location     return ann } addannotations(entranceannotations) 

if check mapviews list of annotations before , after calling addannotations on it, can see added ones appearing in list.

i not have view(for annotation: mkannotation) -> mkannotationview? overridden, shouldn't necessary simple mkpointannotations. if do, , return new instances of mkpinannotationview given color, seems have no effect. whatever i'm doing, these annotations not appearing on map.

is there missing here? trying add single simple new annotation fails have effect.

let annotation = mkpointannotation() annotation.coordinate = cllocationcoordinate2d(latitude: 51.028500, longitude: 13.728653) addannotation(annotation) 

if makes difference, trying run on ios 10 beta 14a5309d xcode 8 beta 3.

i ran myself. custom subclass of mkannotationview relied on initialization done in override of initwithframe: , ios 10, initializing annotationview calling initwithannotation:reuseidentifier: call down initwithframe:. starting in ios 10, though, initwithframe: never called. result of custom annotations had frame of (0, 0, 0, 0) , did not display. adding

[self setframe:cgrectmake(0, 0, somewidth, someheight]; 

inside initwithannotation:reuseidentifier: made annotations appear again under ios10. requires work map equivalent swift solution, issue. set breakpoints in initializers , see one(s) hit!