iphone - My Application Crashing when using url connnections -

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i working on sever based project in if push 3 view controllers 1 one .. each view requesting urls , getting data sever in scenario working fine when pop (or) coming previous view click in button continuously app crashing because data server not received , again requesting url 

 - (void)connectiondidfinishloading:(nsurlconnection *)connection {      [uiapplication sharedapplication].networkactivityindicatorvisible = no;      [self hideloader];      if (_delegate != nil) {          nsmutabledata *data = [[nsmutabledata alloc]initwithdata:responsedata];          [_delegate finishedreceivingdata:data withrequestmessage:requestmessage];          [data release];      } -- getting error here..

and want crash report application there frameworks?

in dealloc method of controller/view (depends delegate) need nil delegate property.

- (void)dealloc {    _urlconnection.delegate = nil;  [super dealloc]; }

don't count on nil condition. can deallocated, not nil.


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