ios - 拍摄照片或从照片库中选择照片后，UIImageView 未使用新图像更新

Question

在我拍照或从我的照片库中选择一张图片后，我试图在 UIImageView 中填充一张图片。

这是处理相机和照片库激活的代码:

@IBAction func activateCmera(_ sender: Any) {
    if (UIImagePickerController.isSourceTypeAvailable(.camera)) {
        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        imagePicker.allowsEditing = false
        self.present(imagePicker, animated: true, completion: nil)
    }
}


@IBAction func activatePhotoLib(_ sender: Any) {
    if (UIImagePickerController.isSourceTypeAvailable(.photoLibrary)) {
        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .photoLibrary
        imagePicker.allowsEditing = false
        self.present(imagePicker, animated: true, completion: nil)
    }
}

这是在 UIImageView 中填充图像的代码:

@IBOutlet weak var imageView: UIImageView!

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    let image = info[UIImagePickerControllerOriginalImage] as! UIImage
    self.imageView.contentMode = .scaleAspectFit
    self.imageView.image = image
    self.dismiss(animated: true, completion: nil);
}

目前，在我用相机拍照或从我的照片库中选择一张图片后，我会被重定向到应用程序的初始 View ，而 UIImageView 空间不会随照片一起更新。

感谢任何帮助，谢谢!

Answer 1

在 Swift 3 中，您需要通过将以下 keys 添加到您的 plist 来访问 photoLibrary，并且您需要使用正确的 委托(delegate)方法。

将 UIImagePickerControllerDelegate 和 UINavigationControllerDelegate 添加到您的 class 并将 imagePicker delegate 设置为 viewDidLoad & 试试下面的代码。

    let imagePicker = UIImagePickerController()

    @IBAction func activatePhotoLib(_ sender: UIButton) { 
    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
        imagePicker.delegate = self
        imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
        imagePicker.allowsEditing = false
        self.present(imagePicker, animated: true, completion: nil)
       } 
     }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        imageView.image = image
     }
    picker.dismiss(animated: true, completion: nil);
    }

输出:更新