フォトライブラリから画像・写真を選択して表示しようと思ってたら、できませんでした。コンパイルも通るしビルドも正常だしおかしいなと思ったら、ログにCreating an image format with an unknown type is an error swiftというログが出てました。

環境

Swift3
Xcode8

Something wrong

err.swift


    public func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo: [String: AnyObject]) {
        
        if didFinishPickingMediaWithInfo[UIImagePickerControllerOriginalImage] != nil {
                   
            yourphoto.image = didFinishPickingMediaWithInfo[UIImagePickerControllerOriginalImage] as? UIImage
            
            self.view.addSubview(yourphoto)
        }
    
        picker.dismiss(animated: true, completion: nil)
    }

everything okay

ok.swift

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
            yourphoto.image = image
        } else{
            print("err")
        } 
        self.dismiss(animated: true, completion: nil)
    }

参考

xCode 8 - Creating an image format with an unknown type is an error

Swift3でCreating an image format with an unknown type is an error swift