iOS开发判断当前ViewController是push还是present的方式显示的

iOS开发判断当前ViewController是push还是present的方式显示的

if (self.navigationController.viewControllers.count > 1 && [self.navigationController.viewControllers lastObject] == self){

       [self.navigationController popViewControllerAnimated:animated];

}else{

       [self dismissViewControllerAnimated:animated completion:nil];

}