ios - Filter Array of Custom Data Class With NSPredicate in Objective-C -

i have custom class of data named dataclass here there detail.

@interface dataclass : nsobject  @property (assign,nonatomic)nsinteger invoiceid; @property (assign,nonatomic)nsinteger aninvoiceid; @property (strong,nonatomic)nsstring *customername; @property (strong,nonatomic)nsstring *departmentname; @property (strong,nonatomic)nsstring *typenumberofinvoice; @property (strong,nonatomic)nsstring *invoicedate; @property (strong,nonatomic)nsstring *stocknumber; @property (strong,nonatomic)nsstring *vehicledetail; @property (strong,nonatomic)nsstring *ronumber; @property (assign,nonatomic)nsinteger amount; @property (strong,nonatomic)nsstring *color; @property (strong,nonatomic)nsstring *year; @property (strong,nonatomic)nsstring *location; @property (strong,nonatomic)nsstring *carvinnumber; @property (strong,nonatomic)nsstring *dealership; @property (strong,nonatomic)nsstring *technician; @property (strong,nonatomic)nsdata *imagedata; @property (strong, nonatomic)nsmutablearray *arrayoflocations; 

in viewcontroller class have textfield taking inputs , showing display according text. have nsmutablearray named arrayofdata , filtereddataarray. arrayofdata contains objects of above dataclass when ever tried using code error

'the left hand side or operator must either nsarray or nsset.'

     nspredicate *atozpredicate =     [nspredicate predicatewithformat:@"any invoiceid contains[cd] %@", searchtext];     filtereddataarray = [arrayofdata filteredarrayusingpredicate:atozpredicate];     [_tableview reloaddata]; 

if comparing integer never use contains. compare equal sign

nspredicate *atozpredicate =         [nspredicate predicatewithformat:@"invoiceid == %d", [searchtext intvalue]];         filtereddataarray = [arrayofdata filteredarrayusingpredicate:atozpredicate];         [_tableview reloaddata];