ios – 在swift中关闭模态viewController时传递数据

这是一个简单的工作示例,您可以测试.请注意使用可选类型(？)作为委托.

// Camera class
protocol communicationControllerCamera {
    func BACkFromCamera()
}

class Camera: UIViewController {
    var delegate: communicationControllerCamera? = nil

    override func viewDidLoad() {
        super.viewDidLoad()
        self.delegate?.BACkFromCamera()
    }
}



// SceneBuilder class
class SceneBuilder: UIViewController,communicationControllerCamera {

   override func viewDidLoad() {
       super.viewDidLoad()
   }

   override func viewDidAppear(animated: Bool) {
       super.viewDidAppear(animated)

       var myCamera = Camera()
       myCamera.delegate = self

       self.presentModalViewController(myCamera,animated: truE)
   }

   func BACkFromCamera() {
       println("BACk from camera")
   }
}

您可以在Apple’s Swift documentation找到所需的所有信息.