ios - app is crashing. when i'm downloading second index of video from custom table cell -


i'm developing app downloading video. it's working good.when i'm downloading first index video. when i'm downloading except video. it's crashing. error showing is:

'nsrangeexception', reason: '* -[__nsarraym objectatindex:]: index 1 beyond bounds [0 .. 0]'" *

     -(void)clickbtn:(id)sender{          btntag =[sender tag];          nslog(@"%d",btntag);          nslog(@"tag number = %ld",(long)[sender tag]);          nsstring *vediourl =[[alldata objectatindex:btntag]valueforkey:@"video"];         nslog(@"%@",vediourl);        nsstring *encodeurl = [vediourl stringbyaddingpercentescapesusingencoding:                              nsasciistringencoding];         nslog(@"%@",encodeurl);             nsurl *url = [nsurl urlwithstring:encodeurl];         nslog(@"%@",url);         self.downloadmanager = [[downloadmanager alloc] initwithdelegate:self];         self.downloadmanager.maxconcurrentdownloads = 4;         [self.downloadmanager adddownloadwithfilename:downloadfilename url:url];            self.startdate = [nsdate date];         [self.downloadmanager start];           uibutton *button1 = (uibutton*)sender;         nslog(@"%@",button1);         cgpoint buttonposition = [sender convertpoint:cgpointzero                                                toview:self.table];          nsindexpath *clickedip = [self.table indexpathforrowatpoint:buttonposition];         nslog(@"%@",clickedip);          downloadcell *cell = (downloadcell *) [self.table cellforrowatindexpath:clickedip];         nslog(@"%@",cell);            download *download = self.downloadmanager.downloads[clickedip.row];          nslog(@"%@",download);             if (download.isdownloading)          {             [self updateprogressviewforindexpath:clickedip download:download];         }         else           {                  cell.progressview.hidden = yes;         }     }

you trying value array contain either 1 value @ 0 index or particular array has been null. , when trying select second cell table-view trying value array @ index 1. in array there no value @ index 1. why app going crashed.

please verify first using nslog array full fill according requirement or not.


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