objective c - C-callback without class pointer -

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in app use javascriptcore api install js function in webview context c callback in cocoa class. there no way can pass callback userdata/refcon pointer know class callback belongs to.

is there way resolve without passing pointer? globals don't seem work since overwritten other class instances.

if global won't work (because of multiple / concurrent calls, likely), need kind of context info.

if api returns kind of unique identifier -- session #, allocated struct, -- set nsmaptable maps between identifier , whatever objective-c goop might need.


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