Ios 从父母到子元素的 Swift Pass 事件

发布于06月15日

我有两门课，即ViewController和BaseViewController

我们已经完成了继承，我的问题是将事件从父级传递到子级，而不是从子级传递到父级.

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()
    }
}

提前谢谢.

推荐答案

假设您需要将拾取的图像从父对象发送给子对象，那么您可以try

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
        
    }
}