相关疑难解决方法(0)

我有一个应用程序,它使用UIImagePickerController从相机和照片库中检索图片.在图像选择器委托中,我只想保存所选图像的NSURL(UIImagePickerControllerReferenceURL)以节省内存.当用户稍后需要查看图像时,我直接从照片库加载PHCachingImageManager.

现在 - 这整个过程非常适合用户从库中选择的图片,但不适用于直接由相机拍摄的图片(因为没有URL).我目前正在尝试使用PHAsset保存图片,但我不知道如何获取保存图片的NSURL.

这就是我一直在做的事情:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
    picker.dismissViewControllerAnimated(true, completion: nil)

    let pickedImage = info[UIImagePickerControllerOriginalImage] as! UIImage

    if picker.sourceType == .Camera
    {
        // When taking a picture with the camera, store it in the user roll
        PHPhotoLibrary.sharedPhotoLibrary().performChanges(
            { () -> Void in

                // save the image
                PHAssetCreationRequest.creationRequestForAssetFromImage(pickedImage)

                // TODO how to get the asset url

            }, completionHandler:
            { (finished, error) -> Void in
                if (finished)
                {

                }
            } …