presentViewController弹出有几种可以选择的类型

presentViewController弹出有几种可以选择的类型

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:[[UIViewController alloc]init]];//UIModalPresentationStylenavigationController.modalPresentationStyle = UIModalPresentationFormSheet;//UIModalTransitionStyleCoverVerticalnavigationController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;[self presentViewController:navigationController animated:YES completion:^(void){}];