uilabel - Swift, Label not refreshing while in callback function -

i want change/reload label on activity indicator while running on loop. not reloading because of “self.netutil.callwebservice(urlstr) {(data)” presume.

my code below —————————————

     if netutil.isconnectedtonetwork() == true     {         self.showactivityindicator(self.view,message: "synch progress...")              //logic toc web service             var urlstr: string = "\(constants.server_url)"             self.container.addsubview(self.lblprocess)             self.netutil.callwebservice(urlstr) {(data) -> void in              self.filemgr.createfiledirectory("/surveyor")             self.filepath = self.filemgr.createfile(self.filemgr.getsurveyourproplistxmlname(""))              self.filemgr.writefile(data, filenamepath: self.filemgr.getsurveyourproplistxmlname(""))             self.xmlnsdata = data.datausingencoding(nsutf8stringencoding)!              self.beginparsing()             self.loadpropertymap()             var unitcount = 0                   prop: property in self.properties                 {                      unitcount++                      view in self.view.subviews                     {                         if view uilabel                         {                             view.removefromsuperview()                         }                     }                      /* refresh label code start here */                      dispatch_async(dispatch_get_main_queue(), {                         //run ui updates                          self.unitcount++                          println("unitcount \( self.unitcount)")                         var totcount = self.properties.count                         var message = "synchronization \(self.unitcount)/\(totcount) buildings completed"                         self.lblprocess.text = message                         self.lblprocess.setneedsdisplay()                      })                      /* refresh label code end here */                      //backup code shfted while pushing in web service                     self.filemgr.getsurveyorunitfiles("", procode: prop.procode string, iscreatebackup: true)                      //back code ended                     self.callunitswebservice(prop.procode string)  //another web service cal                  }              self.lblprocess.removefromsuperview()              self.hideactivityindicator()         } 

output println attached

properties count > 10 unitcount 1 unitcount 2 unitcount 3 unitcount 4 unitcount 5 unitcount 6 unitcount 7 unitcount 8 unitcount 9 unitcount 10

if putting label out of loop reloading… should reload label in loop changes when each loop gets excited?

thanks in advance

you can refresh ui main thread.

the self.netutil.callwebservice(urlstr) {(data) -> void in} runs block, not in main thread.

you have within block:

        //logic synchronization web service         var urlstr: string = "\(constants.server_url)"          //add view. don't forget remove when looping done.         self.container.addsubview(self.lblprocess)          self.netutil.callwebservice(urlstr) {(data) -> void in    //i suspect method reason why label not refreshing          self.beginparsing()         var unitcount = 0          prop: property in self.properties         {               unitcount++              view in self.view.subviews             {                 if view uilabel                 {                     view.removefromsuperview()                 }             }              /* refresh label code start here */             dispatch_async(dispatch_get_main_queue(), {                     //run ui updates                     var totcount = self.properties.count                     var message = "synchronization \(unitcount)/\(totcount) buildings completed"                     self.lblprocess.text = message                     self.lblprocess.setneedsdisplay()             })             /* refresh label code end here */              //backup code shfted while pushing in web service             self.filemgr.getsurveyorunitfiles("", procode: prop.procode string, iscreatebackup: true)              //back code ended             self.callunitswebservice(prop.procode string)  //another web service cal          }          self.hideactivityindicator()     }