CXCallDirectoryProvider in Callkit is not called

Question

I'm trying to build a caller id for iOS application based on the example of Hotline. I have done the following steps:

1. Install the hotline app.
2. Enable the Call blocking and identification in settings.
3. Register the ProviderDelegate and CallManager in AppDelegate

My CallDirectoryHandler as follows:

class CallDirectoryHandler: CXCallDirectoryProvider {
  override func beginRequest(with context: CXCallDirectoryExtensionContext) {
      print("CallDirectoryHandler beginRequest is called")
    context.delegate = self
    
    // Check whether this is an "incremental" data request. If so, only provide the set of phone number blocking
    // and identification entries which have been added or removed since the last time this extension's data was loaded.
    // But the extension must still be prepared to provide the full set of data at any time, so add all blocking
    // and identification phone numbers if the request is not incremental.
    if context.isIncremental {
      addOrRemoveIncrementalBlockingPhoneNumbers(to: context)
      
      addOrRemoveIncrementalIdentificationPhoneNumbers(to: context)
    } else {
      addAllBlockingPhoneNumbers(to: context)
      
      addAllIdentificationPhoneNumbers(to: context)
    }
    
    context.completeRequest()
  }
  

}

I use another phone to call my iPhone. However, the app does not print anything. What steps did I miss ?

Thanks

Answer 1

Well, it's magic. I was using the PyCharm 2021.2.3 (Community Edition), Python 3.10 interpreter and PyQt5 5.15.6 when I got the exception I mentioned in my original post.

I changed the interpreter to Python 3.8 with PyQt5 5.15.4 and voila it worked like I expected it should.

So, I changed the interpreter back to the Python 3.10 that I was originally using and voila it worked like I expected it should.

Thence, I ran it from the command line (Python 3.8 PyQt5 5.15.2 from an Anaconda3 distribution; this was the interpreter that I "did not" refer to in my original question and bummer it failed again.

So, I replace pyqt5 5.15.2 with 5.15.6 (using pip) in the Anaconda3 distribution's file and voila it worked like I expected it should. (pip may have been a no-no; I suppose I will learn in time.)

I do not intend to reinstall the Pyqt5 5.15.2 in the Anaconda3 unless someone is really interested in was it the version or was something corrupted.

Answer 2

Probably you didn't import correctly the package so it couldn't be found.

Did you import it in the beggining of the code:

from PyQt5.QtWidgets import QMainWindow, QApplication, QPushButton, QWidget, QAction, QTabWidget, QVBoxLayout, QLabel

Reference: https://www.geeksforgeeks.org/pyqt5-qtabwidget/

Here is the documentation: https://doc.qt.io/qt-5/qtabwidget.html