objective c - iOS share button crashing when run on ipad -

i working on xcode project in objective-c , want share button on ios application share things watched tutorial on youtube here's link : https://www.youtube.com/watch?v=zkrokn_oa_a when run code on iphone works , when run code on ipad xcode give's me error :

int main(int argc, char * argv[]) { @autoreleasepool {     return uiapplicationmain(argc, argv, nil, nsstringfromclass([appdelegate class])); }} 

i used code :

- (ibaction)share1:(id)sender {  uiimage *shareimage = [uiimage imagenamed:@"invoice_logo.png"]; nsarray *itemstoshare = @[shareimage]; uiactivityviewcontroller *activityvc = [[uiactivityviewcontroller alloc] initwithactivityitems:itemstoshare applicationactivities:nil]; activityvc.excludedactivitytypes = @[]; [self presentviewcontroller:activityvc animated:yes completion:nil];} 

you missing :

activityvc.excludedactivitytypes=@[uiactivitytypeposttofacebook,uiactivitytypeposttotwitter]// add share types 

look @ video provided 7:30 min