ios - Alamofire Async time in Swift3 -


i have complicate problem me, seems alamofire async problem, , tried find solution here, didn't.. can extract other information in photoasset(i used dkimagepickercontroller), image , creation date..etc. i'd reverse-geo coding using google api, that's why need use alamofire. imagelist return yes, dkassetlist yes, addresslist use alamofire return nil!! please me problem..

below code.

@iboutlet weak var imagecollectionview: uicollectionview! var imagelist:[uiimage] = [] var addresslist:[string]? var dkassetslist:[dkasset] = [] var locationinfo:[photolocationinfo] = [] var datelist:[date] = []  @ibaction func imagepickerbuttontouched(_ sender: uibutton) {      let pickercontroller = dkimagepickercontroller()      pickercontroller.didselectassets = {[unowned self](assets: [dkasset]) in          asset in assets {              self.dkassetslist.append(asset)             print(self.dkassetslist)               let assetlocation = asset.location?.coordinate              let assetlongitude = assetlocation?.longitude ?? 33.3333             let assetlatitude = assetlocation?.latitude ?? 121.000              let urlstring = "https://maps.googleapis.com/maps/api/geocode/json?latlng=\(assetlatitude),\(assetlongitude)&key=aizasybakz-vm07x452ocvplbqcloth2askjpxe"              alamofire.request(urlstring, method: .get, parameters: nil, encoding: jsonencoding.prettyprinted, headers: nil).responsejson(completionhandler: {[unowned self](response) in                  guard let data = response.result.value else {return}                  if response.result.issuccess {                     let mydata = json(data)                      print(mydata["results"][0]["formatted_address"].stringvalue)                     self.addresslist?.append(mydata["results"][0]["formatted_address"].stringvalue)                     self.imagecollectionview.reloaddata()                     print(self.addresslist)                 }             })


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