ios - how to use ProgressView in xcode for show download's status -


i create 1 application download file url size.i have 1 button , 1 progress view in page . want when click on button downloaded file , show me download's status in progress view.

i can download file code dont know how use progress view code:

- (ibaction)download:(id)sender {     dispatch_async(dispatch_get_global_queue(dispatch_queue_priority_default, 0), ^{         nslog(@"downloading started");         nsstring *urltodownload = @"http://192.168.1.100/emma/adele%20-%20someone%20like%20you%20(mtv%20video%20music%20awards%202011)%20hd%20live.mkv";         nsurl *url = [nsurl urlwithstring:urltodownload];         nsdata *urldata = [nsdata datawithcontentsofurl:url];         if ( urldata )         {             nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);             nsstring *documentsdirectory = [paths objectatindex:0];              nsstring *filepath = [nsstring stringwithformat:@"%@/%@", documentsdirectory,@"filename.mkv"];             dispatch_async(dispatch_get_main_queue(), ^{                 [urldata writetofile:filepath atomically:yes];                 nslog(@"file saved !");             });             x = 1;             nslog(@"x : %d",x);         }      }); }

please guide me it.

define nstimer *timer in .h file , set progressview in .xib

- (ibaction)download:(id)sender {     dispatch_async(dispatch_get_global_queue(dispatch_queue_priority_default, 0), ^{         nslog(@"downloading started");         nsstring *urltodownload = @"http://192.168.1.100/emma/adele%20-%20someone%20like%20you%20(mtv%20video%20music%20awards%202011)%20hd%20live.mkv";         nsurl *url = [nsurl urlwithstring:urltodownload];         nsdata *urldata = [nsdata datawithcontentsofurl:url];         if ( urldata )         {             nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);             nsstring *documentsdirectory = [paths objectatindex:0];              nsstring *filepath = [nsstring stringwithformat:@"%@/%@", documentsdirectory,@"filename.mkv"];              timer = [nstimer timerwithtimeinterval:0.5 target:self selector:@selector(updateprogressview) userinfo:nil repeats:yes];             [timer fire];               dispatch_async(dispatch_get_main_queue(), ^{                 [urldata writetofile:filepath atomically:yes];                 nslog(@"file saved !");             });             x = 1;             nslog(@"x : %d",x);         }      }); }

and add method 

- (void) updateprogressview{     nsstring *urltodownload = @"http://192.168.1.100/emma/adele%20-%20someone%20like%20you%20(mtv%20video%20music%20awards%202011)%20hd%20live.mkv";     nsurl *url = [nsurl urlwithstring:urltodownload];     nsdata *urldata = [nsdata datawithcontentsofurl:url];      nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     nsstring *documentsdirectory = [paths objectatindex:0];      nsstring *filepath = [nsstring stringwithformat:@"%@/%@", documentsdirectory,@"filename.mkv"];     nsdata *writtendata = [nsdata datawithcontentsoffile:filepath];      float progress = [writtendata length]/(float)[urldata length];     [progressview setprogress:progress];     if (progress == 1.0){          [timer invalidate];     } }

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