ios - How to solve this error "this class is not key value coding compliant for the key"? -

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i have created uitableview , in uitableview every row have more 1 uitextfield. how each uitextfield values. below sample code. 

    - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {         int  j= 285;                     (int i=0; i<7; i++) {      nsstring *txtindvalue =[nsstring stringwithformat:@"index%d",i];                            uitextfield *txtvalue =  [[uitextfield alloc] initwithframe:cgrectmake(j,5.0f,25.0f,20.0f)];                 [txtvalue setborderstyle:uitextborderstyleline];     [txtvalue settag:indexpath.row]     [txtvalue setvalue:txtindvalue forkey:@"test"]                 [cell addsubview:txtvalue];                 j = j + 35;             }     }  error: terminating app due uncaught exception 'nsunknownkeyexception' ,reason :'[<uitextfield .>' setvalue:forundefindekey:] class not key value codeing compliant key. please me. 

[txtvalue setvalue:txtindvalue forkey:@"test"]

this line causing crash. setvalueforkey not property/method of uitextfield. if want set text on textfield , should use 

txt value.text = @"some text".

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