3D Touch for Shortcuts Crashes - ios

Question

My app is a single-view NavigationController as a root view controller style app. In it, I have a few different shortcut items for using 3D Touch. I have them all set up in the Info.plist fine (I've done this before with a Tab Bar app and it worked fine), but it crashes every time an shortcut action is pressed. Here is my the code used in AppDelegate in Obj-C.
- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {
UINavigationController *nav = (UINavigationController *) self.theMainView.view;
NSLog(#"%#", shortcutItem.type);
if ([shortcutItem.type isEqualToString:#"com.316apps.Fritch.inviteFriends"]) {
ImagePicker *vimeo= [[ImagePicker alloc] init];
[nav pushViewController:vimeo animated:YES];
}
if ([shortcutItem.type isEqualToString:#"com.316apps.Fritch.viewAlerts"]) {
NewsViewController *dvController8 = [[NewsViewController alloc] initWithNibName:#"NewsViewController" bundle:[NSBundle mainBundle]];
[nav pushViewController:dvController8 animated:YES];
}
if ([shortcutItem.type isEqualToString:#"com.316apps.Fritch.viewDirectory"]) {
DirectoryViewController *dvController8 = [[DirectoryViewController alloc] init];
[nav pushViewController:dvController8 animated:YES];
}
}
Crash Log:
com.316apps.Fritch.viewDirectory
2017-01-19 22:44:23.305906 Fritch[3956:925348] -[UILayoutContainerView pushViewController:animated:]: unrecognized selector sent to instance 0x101837530
2017-01-19 22:44:23.306768 Fritch[3956:925348] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UILayoutContainerView pushViewController:animated:]: unrecognized selector sent to instance

Answer 1

UINavigationController *nav = (UINavigationController *) self.theMainView.view;
The reason of crashing is you are getting the view, not ViewController. So self.theMainView.view cannot convert to UINavigationController. If your self.theMainView is correct, fix that crash by using:
UINavigationController *nav = (UINavigationController *) self.theMainView;