Question

我正在使用静态UIImagePickerController，它在应用程序打开时初始化，以避免浪费时间，cpu和内存以后创建更多内容。

因此，我想更改UIImagePickerController的委托。每当我尝试设置委托时，print(imagePickerController.delegate)打印nil，并且未设置委托。

我的委托类是这样的：

class ImagePickerDelegateForProfilePictureController: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

使用初始化程序创建它，该初始化程序提供对这样的配置文件图片控制器的引用：

MySingletonClass.imagePickerController.delegate = ImagePickerDelegateForProfilePictureController(profilePictureController: self)

我已实施didFinishPickingMediaWithInfo和imagePickerControllerDidCancel

任何帮助将不胜感激！

编辑：以下是我的代码的相关部分。 ImagePickerDelegate：

// MARK: - ImagePickerDelegateForProfilePictureController
class ImagePickerDelegateForProfilePictureController: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    // The profile picture controller
    var profilePictureController: ProfilePictureController?

    // Initializer for the delegate
    init(profilePictureController: ProfilePictureController) {
        super.init()
        self.profilePictureController = profilePictureController
    }

    // MARK: - Picker Controller Functions
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        // Set profile picture
    }
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        // Dismiss the picker controller
    }
}

ProfilePictureController中的相关代码：

lazy var profilePictureDelegate = ImagePickerDelegateForProfilePictureController(profilePictureController: self)

@objc func setDelegateAndPresentImagePicker() {
    // Set the delegate
    MySingletonClass.imagePickerController.delegate = profilePictureDelegate
    // Prints nil
    print(MySingletonClass.imagePickerController.delegate)
    // Present the imagePicker
    present(MySingletonClass.imagePickerController, animated: true, completion: nil)
}

imagePickerController在单身类中声明，如此

// imagePickerController: A standard image picker controller we can change the delegate of
static var imagePickerController: UIImagePickerController {
    let ipc = UIImagePickerController()
    ipc.mediaTypes = [kUTTypeImage as String]  // import MobileCoreServices, Photos
    return ipc
}

将UIImagePickerController委托设置为self以外的其他内容

0 个答案: