ios - Creating Custom Call out View -

i'm trying add view when click in pin, appears title , subtitle , not view did add.

here code

  -(void) inserirmapa {     appdelegate *appdelegate = (appdelegate *)[[uiapplication sharedapplication]delegate];     nsmutablearray *pins = [[nsmutablearray alloc]init]; //array de annotations     for(int icnt = 0; icnt < [_listapins count]; icnt++) {         pin *pin = (pin *) [_listapins objectatindex:icnt];          cllocationcoordinate2d start;         start.latitude = pin.place.latitude;         start.longitude = pin.place.longitude;         mkcoordinateregion region = mkcoordinateregionmakewithdistance(start, 800, 800);         [_mymapview setregion:[_mymapview regionthatfits:region] animated:yes];          // add annotation         mkpointannotation *point = [[mkpointannotation alloc] init];         point.coordinate = start;         point.title = @"where i?";         point.subtitle = @"i'm here!!!";          [_mymapview addannotation:point];          [pins addobject:point];//adiciona annotation no array         [point release];     }     self.myannotations= [nsarray arraywitharray:pins]; //diz que o array myannotations é igual ao array estacionamentos(que contem annotations         [pins release];         [self configurarzoomdomapacomlatitude:appdelegate.latitude elongitude:appdelegate.longitude]; //configura o zoom inicial mapa       [_mymapview addannotations:_myannotations];      [_viewloading sethidden:yes]; } 

and here add custom view. put breakpoint here , function called, when click in pin, appearas title , subtitle..ignoring view added

- (mkannotationview *)mapview:(mkmapview *)mapview viewforannotation:(id <mkannotation>)annotation {     mkannotationview* annotationview = nil;      //your code      uiview *vw = [[uiview alloc] initwithframe:cgrectmake(0, 0, 100, 100)];     vw.backgroundcolor = [uicolor redcolor];     uilabel *label = [[uilabel alloc] initwithframe:cgrectmake(5, 5, 50, 50)];     label.numberoflines = 4;     label.text = @"hello\nhow you\nfine";     [vw addsubview:label];     annotationview.leftcalloutaccessoryview = vw;     return annotationview;  } 

in viewforannotation, code declares , initializes annotationview nil , never instantiates (alloc+init).

therefore, delegate method returns nil tells map view "create default view annotation". default view annotation other user location red pin callout shows title , subtitle.

however, if alloc+init plain mkannotationview fix it, annotations not visible since default mkannotationview has no content. need set image or add subview.

instead, alloc+init mkpinannotationview default show red pin.
should implement annotation view re-use calling dequeuereusableannotationviewwithidentifier improve performance when there lots of annotations:

- (mkannotationview *)mapview:(mkmapview *)mapview viewforannotation:(id <mkannotation>)annotation {     static nsstring *reuseid = @"ann";      mkpinannotationview *annotationview = (mkpinannotationview *)[mapview          dequeuereusableannotationviewwithidentifier:reuseid];     if (annotationview == nil)     {         annotationview = [[mkpinannotationview alloc]                                   initwithannotation:annotation                                      reuseidentifier:@"test"];         annotationview.canshowcallout = yes;  //set yes, default no          //your code          uiview *vw = [[uiview alloc] initwithframe:cgrectmake(0, 0, 100, 100)];         vw.backgroundcolor = [uicolor redcolor];         uilabel *label = [[uilabel alloc] initwithframe:cgrectmake(5, 5, 50, 50)];         label.numberoflines = 4;         label.text = @"hello\nhow you\nfine";         [vw addsubview:label];         annotationview.leftcalloutaccessoryview = vw;     }     else     {         //update view's annotation reference          //because re-using view may have         //been used annotation...         annotationview.annotation = annotation;     }      return annotationview; } 

should fix custom leftcalloutaccessoryview not appearing.
however, note documentation says leftcalloutaccessoryview (and rightcalloutaccessoryview):

the height of view should 32 pixels or less.

the custom view , label code creating both more 32 pixels high.

unrelated comment regarding loop adds annotations:
not need call setregion adding each annotation.
calling setregion tells map view display indicated region.
not needed add annotation (the map doesn't have displaying coordinate adding annotation at).