Swift中的UINavigationController

Question

在我的示例代码中，我使用UINavigationController。我有保存新的数据到核心数据UIViewController，那么我要关闭这个UIViewController并返回上一级：

@IBAction func saveButtonPressed(sender : AnyObject) { 

    let appDelegate:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate) 
    let context:NSManagedObjectContext = appDelegate.managedObjectContext 
    let projectEntity = NSEntityDescription.entityForName("Person", inManagedObjectContext: context) 
    var newPerson = AddrBook(entity: projectEntity, insertIntoManagedObjectContext: context) 
    newPerson.lastname = lastNameField.text 
    newPerson.firstname = firstNameField.text 
    context.save(nil) 
    self.navigationController.dismissViewControllerAnimated(true, completion: nil) 
} 

但self.navigationController.dismissViewControllerAnimated(true, completion: nil)不工作....有什么不对？

Answer 1

对不起！我解决了问题：

self.navigationController.popViewControllerAnimated(true)