从父母到孩子的迅速通过事件

Question

我有2个类IE viewController和baseViewController

我们已经完成了继承，我有疑问要通过事件从父母到子女而不是孩子，而不是父母。

class BaseViewController: UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate {
    func openCamera() {
       // open UIImagePickerController 
    }

    // Delegates Methods of Image-picker controller
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
        ***My Question: //Pass Event to child class***
    }
}

class ViewController: BaseViewController {

    @IBAction func cameraButtonClicked(_sender: Any) {
        self.openCamera()
    }
}

提前致谢。

Answer 1

假设您需要从父母发送挑选的图像到孩子的事件，然后您可以尝试

class BaseViewController: UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate {

    func openCamera() {
       // open UIImagePickerController
    }

    // Delegates Methods of Image-picker controller
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
       sendImage(.....   
    }

    func sendImage(_ image:UIImage) { 
        
    }
}

class ViewController: BaseViewController {

    @IBAction func cameraButtonClicked(_sender: Any) {
        self.openCamera()
    }
    
    override func sendImage(_ image:UIImage) { // override it here
        
    }
}