Question

我尝试使用CreateProcess() argument 2 must be string without null bytes or None, not str在我的应用中发送电子邮件。

Traceback:

File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner
  41.             response = get_response(request)

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "C:\Python27\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
  58.         return view_func(*args, **kwargs)

File "C:\Python27\lib\site-packages\django\views\generic\base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
  489.             response = self.handle_exception(exc)

File "C:\Python27\lib\site-packages\rest_framework\views.py" in handle_exception
  449.             self.raise_uncaught_exception(exc)

File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
  486.             response = handler(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\rest_framework\generics.py" in get
  201.         return self.list(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\rest_framework\mixins.py" in list
  45.             return self.get_paginated_response(serializer.data)

File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in data
  739.         ret = super(ListSerializer, self).data

File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in data
  263.                 self._data = self.to_representation(self.instance)

File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in to_representation
  657.             self.child.to_representation(item) for item in iterable

File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in to_representation
  501.                 ret[field.field_name] = field.to_representation(attribute)

File "C:\Python27\lib\site-packages\rest_framework\fields.py" in to_representation
  1755.         return method(value)

File "C:\Users\User\Desktop\Feed\backend\api\media\video.py" in get_duration
  61.         result = getLength(obj.video_file)

File "C:\Users\User\Desktop\Feed\backend\api\media\video.py" in getLength
  33.     result = subprocess.Popen(['ffprobe', filename], stdout = subprocess.PIPE, stderr = subprocess.STDOUT)

File "C:\Python27\lib\subprocess.py" in __init__
  390.                                 errread, errwrite)

File "C:\Python27\lib\subprocess.py" in _execute_child
  640.                                          startupinfo)

Exception Type: TypeError at /api/v1/media/video/feed/
Exception Value: CreateProcess() argument 2 must be string without null bytes or None, not str

运行我的应用程序后，显示了作曲器屏幕，但是没有显示MFMailComposeViewController和let email = "..." let mailComposer = MFMailComposeViewController() mailComposer.mailComposeDelegate = self mailComposer.setToRecipients([email]) self.navigationController?.present(mailComposer, animated: true)按钮。我尝试了许多可能的解决方案，因为两个NavigationControllers都更改了cancel。例如：

send

但是“问题”仍然存在。

有什么想法吗？

Answer 1

请尝试以下代码

class TechSupportVC: UIViewController, MFMailComposeViewControllerDelegate {
    let composeVC = MFMailComposeViewController()

override func viewDidLoad() {
    super.viewDidLoad()

    composeVC.mailComposeDelegate = self
    composeVC.setToRecipients(["desiredEmail@gmail.com"])
    composeVC.setSubject("My message")
}

func mailComposeController(_ controller: MFMailComposeViewController,
                                   didFinishWith result: MFMailComposeResult,
                                   error: Swift.Error?) {
            controller.dismiss(animated: true, completion: nil)
        }

@IBAction func sendPressed(_ sender: Any) {
    guard MFMailComposeViewController.canSendMail() else {
        showMailServiceErrorAlert()
        return
    }

    composeVC.setMessageBody("Test credentials: \(firstAndLastNameTextField.text!)\nPhone: \(numberTextField.text!)\n\n\(messageTextView.text!)", isHTML: false)

    self.present(composeVC, animated: true, completion: nil)
}

Answer 2

mailComposeDelegate应该继承自UIViewController。在其他情况下，解雇MFMailComposeViewController无效并崩溃。好像是苹果的虫子

MFMailComposeViewController返回并发送按钮不起作用

2 个答案: