Swift：UIImagePickerController - 在解包Optional值时意外地发现了nil

Question

我正在尝试使用UIImagePickerController在我的应用中拍摄图片。视图加载正确，拍摄照片后的方法被正确调用。但是在我的方法中，当我试图使用拍摄的图像时，我得到以下错误。错误出现在我将 UIImage 设置为 UIImageView 的行中。

Unexpectedly found nil while unwrapping an Optional value

这是我的方法：

func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage pickerImage: UIImage!, editingInfo: NSDictionary!) {
    var insertViewControllerStoryboard = self.storyboard?.instantiateViewControllerWithIdentifier("InsertViewController");
    self.showViewController((insertViewControllerStoryboard as InsertViewController), sender: insertViewController);

    insertViewController.imageView.image = pickerImage;

    self.dismissViewControllerAnimated(true, completion: nil);
}

当我记录变量 pickerImage 时，变量不是nil。变量用UIImage填充。为什么会出现此错误？

Answer 1

试试这个：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

    ....

    var pickerImage:UIImage = info[UIImagePickerControllerOriginalImage] as UIImage
    insertViewController.imageView.image = pickerImage;