ios - Variable scoping in Swift with tasks -


i've got of code inside of function in view controller: 

self.activityindicator.startanimating()  let url = nsurl(string: "http://www.google.com")  var request = nsmutableurlrequest(url: url!) request.httpmethod = "put"  var err: nserror? request.httpbody = nsjsonserialization.datawithjsonobject(["notes": self.textview.text], options: nil, error: &err) request.addvalue("application/json", forhttpheaderfield: "content-type") request.addvalue("application/json", forhttpheaderfield: "accept") var s = nsstring(data: request.httpbody!, encoding: nsutf8stringencoding)  let task = nsurlsession.sharedsession().datataskwithrequest(request, completionhandler: { (data, reponse, error) -> void in      // ------------------     // doesn't work     // ------------------     self.activityindicator.stopanimating()       println(nsstring(data: data, encoding: nsutf8stringencoding)) }) task.resume()

i want activity indicator stop animating when finished task, calling stopanimating() isn't doing - not throwing errors. know doing wrong?

you need on main ui thread this:

    // ------------------     // should work :-)     // ------------------ dispatch_async(dispatch_get_main_queue(), {          // on mainthread         self.activityindicator.stopanimating()         })

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