objective c - iOS Crash if the orientation changes while view is changing -


i having bug if orientation of device changes while view changing view lose of subviews , if action taken app crash.

i tried turning off listening orientation changes if viewwilldissappear still doesn't solve problem. has else had problem? , how can fix it?

edit: exception getting "can't add self subview"

here how push new view controller

classa.h

@class classb; @interface classa : uiviewcontroller {  classb *classb; }

classa.m

-(void)buttonaction:(uibutton*)sender{      classb = [[[classb alloc] initwithnibname:@"mynibname" bundle:nil classa:self] autorelease];      [self.navigationcontroller pushviewcontroller:classb animated:yes]; }

classb.m

//turn on orientation -(void)viewwillappear:(bool)animated{     [[nsnotificationcenter defaultcenter] addobserver:self  selector:@selector(orientationchanged:)  name:uideviceorientationdidchangenotification  object:nil]; }  //turn off orientation -(void)viewdiddisappear:(bool)animated{     [[nsnotificationcenter defaultcenter]removeobserver:self name:uideviceorientationdidchangenotification object:nil]; }

edit2: believe problem how detect orientation , change view. work on rebuilding code/getting apples standard orientation code working. thank help.


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