How to automatically show alert iOS

Question

I have a Device Firmware Update view where I update the physical devices' firmware. My goal is to show the alert when the DFU state is .completed . That means I want to bind the alert popup to the state, not to the action. Here is what I have so far:

func showDFUCompletedAlert() {
     let dfuAlert = UIAlertController(title: "The device firmware is updated successfully.", message: "You will be redirected back to the Devices list. To get back to your device just tap on it without refreshing Devices list.", preferredStyle: .alert)
        
     dfuAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: {_ in
            self.dfuUpdate = nil
        }))
        
     self.present(dfuAlert, animated: true)
    }

So, the question is: how do I show the alert right after the device firmware update is completed without tapping on the buttons etc?

Thanks!

UPDATE: Adding the code of the DFU States:

func dfuStateDidChange(to state: DFUState) {
     print(state.description())
     case .connecting:
            self.updateView?.selectButton.isHidden = true
     case .starting:
            self.updateView?.selectButton.isHidden = true
     case .aborted:
            self.updateView?.selectButton.isHidden = false
            self.updateView?._fileURL = nil
            self.updateView?.fileNameLabel.text = "Select file"
     case .completed:
     supportDelegate?.showDFUCompletedAlert()
}

UPDATE [2]: Breakpoint report:

libsystem_kernel.dylib`mach_msg_trap:
    0x18f63c0ec <+0>: mov    x16, #-0x1f
    0x18f63c0f0 <+4>: svc    #0x80
->  0x18f63c0f4 <+8>: ret    

Answer 1

As we found out in comments, you forget to set the delegates for your controller, and the showDFUCompletedAlert() method didn't run.