如何从UIImagePickerController获取PNG表示？

Question

我正在尝试从UIImagePickerController获取图像，但图像正在接收为原始图像，并且它的尺寸很大并且减慢了我的应用。在这种情况下，如何获得 PNG 表示形式：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        treatmentProtocolPhoto.image = selectedImage
        dismissViewControllerAnimated(true, completion: nil)
    }

我很感激这个问题的任何帮助。

Answer 1

试试这个：

let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
let imgData : NSData = UIImagePNGRepresentation(selectedImage)!
treatmentProtocolPhoto.image = UIImage(data: imgData)! 
dismissViewControllerAnimated(true, completion: nil)

Answer 2

您可以通过以下方式获取PNG版本：

UIImagePNGRepresentation(selectedImage)