Unable to run JSContext in background thread

Question

Created Nov ’21

Replies 2

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Here I'm initiating the JS call from swift and based on the results app UI gets updated. Since this method is time taking process it freezes the app for a few seconds and becomes normal. We can understand it's running in the main thread so blocked the UI. I have tried to run it in the background using the below code and it doesn't work.

DispatchQueue.global(qos: .background).async {                        
            let fn = engineJSContext?.objectForKeyedSubscript("jsMethodName")
            let val = fn?.call(withArguments: [params1, params2])
    }

As per the document , we can run it from any thread, but I'm facing a problem on the background thread . Any help on this please.

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Answer 1

DTS Engineer OP

Apple

Nov ’21

I have tried to run it in the background using the below code and it doesn't work.

Can you elaborate on “doesn’t work”? What symptoms do you see?

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Answer 2

Gobim OP

Nov ’21

Facing application UI freeze when this method is running.

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