I tried this and it seems to work - but does it look sound?
let theVolume = xmlDoc.root["volumeUpdated"].first
if theVolume != nil {
print(">> We have a volume update. \(String(describing: theVolume!))")
}
On Wed, Apr 5, 2017 at 10:56 AM Eric E. Dolecki wrote:
> I'm using AEXML and I have some return XML from a WebSocket. I want to
> check if the return XML contains a node or not. In this way, I know what
> kind of data I'm receiving.
>
>
>
>
>
> What's the best way to check if that volumeUpdated node exists? It has no
> attributes or value.
>
> I tried this (AEXMLElement is non-optional):
>
> let theVolume = xmlDoc.root["volumeUpdated"]
> if theVolume != nil {
> print(">> We have a volume update. \(theVolume)")
> }
>
> But I get a "comparing non-optional value of type 'AEXMLElement' to nil
> always returns true.
>
>
>
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