Check if node already attached to AVAudioEngine

Question

I successfully attach AVAudioPlayer nodes to my AVAudioEngine. However, I need to later check if these nodes have already been attached to it (so I don't re-add them).

Is there any certain property on the engine that I can check to see if its already been attached?

score 1 · Answer 1 · answered Dec 15 '17 at 16:16

1

You could check the engine property of the AVAudioPlayerNode and if nil this means it is not attached to an audio engine.

for playerNode in yourPlayerNodeArray {
        if playerNode.engine == nil {
            yourEngine.attach(playerNode)
        }
    }

answered Dec 15 '17 at 16:16

Jess

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Looks for me like a solution. Let me know if there are any pitfalls? – Sirop4ik Nov 03 '21 at 09:36

score 0 · Answer 2 · answered Feb 20 '16 at 22:43

0

The implementation more than likely uses an interface implementation and has an API associated with it. I would suggest reading the API to check if a function exists that returns a list of (active) nodes attached.

answered Feb 20 '16 at 22:43

Berni

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13

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Yes I read the docs but didn't see anything helpful so am wondering if there are any other ways anybody knows – vikzilla Feb 20 '16 at 22:44
Create a **model** and store the a reference to the attached nodes. And create a static API for the **model** so that you can store and retrieve a reference to the nodes. – Berni Feb 20 '16 at 22:53

Check if node already attached to AVAudioEngine

2 Answers2