objective c - iOS UIButton Touch-Up-Inside weird behavior -

my ios application contains tableview , has today widget extension wich contains tableview. both tableviews can contain cells wich feature 2 buttons. tableviews content mode "dynamic properties" , each prototype cell has own uitableviewcell class. in cellforrowatindexpath: create cells:

}else if (...){      static nsstring *cellidentifier_item_button = @"button_cell";     btncell *button_cell = [tableview dequeuereusablecellwithidentifier:cellidentifier_item_button forindexpath:indexpath];     button_cell.on_button.tag = indexpath.row;     button_cell.off_button.tag = indexpath.row;     [button_cell.on_button addtarget:self action:@selector(on_button_clicked:) forcontrolevents:uicontroleventtouchupinside];     [button_cell.off_button addtarget:self action:@selector(off_button_clicked:) forcontrolevents:uicontroleventtouchupinside];      return button_cell;  } 

and both targets this:

-(void)off_button_clicked:(uibutton*)sender {     //some additional code here     [self sendrequest:url]; } 

and finally:

-(void) sendrequest:(nsstring *)ip{ nsurl *requesturl = [nsurl urlwithstring:ip]; nsurlrequest *request = [nsurlrequest requestwithurl:requesturl                                          cachepolicy:nsurlrequestreloadignoringlocalandremotecachedata                                      timeoutinterval:10.0]; nsurlconnection *conn = [[nsurlconnection alloc] initwithrequest:request delegate:self startimmediately:yes];  } 

both widget , app use exact same code. , problem: when tap on button on widget, gehts highlighted , request gets send. in app, button gets highlighted if hold button half second. have no idea why happens, ideas ? thanks

nsurlconnection *conn = [[nsurlconnection alloc] initwithrequest:request delegate:self startimmediately:yes]; 

will create synchronous request instead use

[nsurlconnection sendasynchronousrequest:request];