ios - Filter NSArray with NSPredicate gives always null -

i'm having following core data entities:

now have nsarray poi entities.

i want filter array predicate searches on every attribute has see if contains user searches.

for example: array object 0 : address = test details = test1 ..

array object 1: address = ba details = ba1 ..

and users searches 'e', want nsarray object 0.

i tried this:

nspredicate *resultpredicate = [nspredicate                                 predicatewithformat:@"self contains[cd] %@",                                 searchtext];   searchresults = [_dataarray filteredarrayusingpredicate:resultpredicate]; 

but returns nothing.

can me out on this?

please try this;

[nspredicate predicatewithformat:@"self.propertyname contains[cd] %@", searchtext];