在类中添加NavigationController而不是在appdelegate中

Question

如何在任何类的viewDidLoad方法中为下一个类添加navigationcontroller，我还没有在appdelegate的开头添加它。

Answer 1

YourViewController *report = [[YourViewController alloc]  init]; // create Object of YourViewController

UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:report]; // add YourViewController as root view controller of UINavigationController

[self presentModalViewController:navigationController animated:YES];