How to navigate To a ViewController From xib file

问题:

I have a view in my xib file which contain buttons. i want to move to a ViewController when i will press the button (@IBAction). I have used below code

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("About") as! AboutViewController
self.presentViewController(nextViewController, animated: true, completion: nil)

I am getting the error "Value of type 'SlideMenuView' has no member 'presentViewController'.

because my class is a UIView type :

class SlideMenuView: UIView { 
}

so how can I navigate to other view controller.

回答1:

That is beacuase the class you are trying to present from is a UIView and not a UIViewController. It has no Present method.

I'm guessing your view (SlideMenuView) is embedded inside a viewcontroller. what you need to do is implement a delegate, and inform your containing viewController to present next Viewcontroller.

code below:

@protocol SlideMenuViewDelegate: class {
  func slideMenuViewAboutButtonClicked(menuView: SlideMenuView)
class SlideMenuView: UIView { 

weak var delegate: SlideMenuViewDelegate?

@IBAction func aboutButtonClicked(sender: AnyObject) {
self.delegate?.slideMenuViewAboutButtonClicked(self)
}

now, in your viewController, implement this delegate method:

func slideMenuViewAboutButtonClicked(menuView: SlideMenuView) {
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("About") as! AboutViewController
self.presentViewController(nextViewController, animated: true, completion: nil)
}

Also, dont forget to assign the sliderMenuView object the viewcontroller as a delegate. something like:

self.sliderMenuView.delegate = self // (self == the containing viewController

回答2:

I did it in a different way. In class file

class SlideMenuView: UIView {

var navigationController: UINavigationController? // Declare a navigation controller variable

// And create a method which take a navigation controller

func prepareScreen(navController: UINavigationController)-> UIView {

    navigationController = navController      
    let nibView = NSBundle.mainBundle().loadNibNamed("SlideMenuView", owner: self, options: nil)[0] as! UIView        
    self.addSubview(nibView)       
    return nibView
}

// In Button action

@IBAction func btnAction(sender: UIButton) {

     var storyBoard = UIStoryboard(name: "Main", bundle: nil)
    let nextViewController = storyBoard!.instantiateViewControllerWithIdentifier("NextViewController") as! UIViewController
    navigationController?.pushViewController(nextViewController, animated: true)
}

}

// For calling from UIViewController

slideBarMenuIstance.prepareScreen(self.navigationController!)