Initializer for conditional binding must have Optional type, not 'AVAudioInputNode' // Swift 4.2

Question

This code:

guard let node = audioEngine.inputNode else { return }

Results in the following error:

Initializer for conditional binding must have Optional type, not 'AVAudioInputNode'

What should I change to make it work?

Tried to delete guard but it doesn't help.

Answer 1

Doing the guard let node = audioEngine.inputNode ... is trying to unwrap an optional value. However, audioEngine.inputNode does not return an optional value.

If you just do let node = audioEngine.inputNode (without the guard let return), it will work.