Swift函数没有被调用？

Question

Alright, so i am making a video only app with AVKit and MobileCoreServices. The video part works perfect except for when I click "Use Video", it doesn't save it like it's supposed to. Here are all my functions being called upon:

This function isn't being called correctly for some reason but i am receiving no errors or console errors/warnings

Here is my extension where i am calling the video function in the UISaveVideoAtPathToSavedPhotosAlbum.

Here is the button action, where when it is pressed, i am calling the startCameraFromViewController function.

And finally here is the startCameraFromViewController function.

Answer 1

It looks like the problem is that your UIImagePickerControllerDelegate method signature doesn't quite match. (Probably the example you used was from Swift 2 and has changed for Swift 3). The proper signature is:

optional func imagePickerController(_ picker: UIImagePickerController, 
  didFinishPickingMediaWithInfo info: [String : Any])

Note the underscore before the first argument.