ios - present UIImagePickerController from UIModalPresentationFormSheet in landscape mode (iPad) -

i'm trying present uiimagepickercontroller controller presented on ipad in uimodalpresentationformsheet mode.

but i'm getting following error

*** terminating app due uncaught exception 'uiapplicationinvalidinterfaceorientation', reason: 'supported orientations has no common orientation application, , [puuialbumlistviewcontroller shouldautorotate] returning yes'

- (void)showpickerwithsourcetype:(uiimagepickercontrollersourcetype)sourcetype {     uiimagepickercontroller *picker = [[uiimagepickercontroller alloc] init];     picker.delegate = self;     picker.allowsediting = yes;     picker.sourcetype = sourcetype;      [self presentviewcontroller:picker animated:yes completion:nil]; } 

how can present in landscape mode?