NSPredicate filter array within object within array

Question

I have the following method:

- (NSMutableArray *)getFilteredArrayFromArray:(NSMutableArray *)array withText:(NSString *)text {

if ([array count] <= 0)
           


        

Answer 1

First of all, you should not use stringWithFormat to build predicates. This can cause problems if the search text contains any special characters like ' or ". So you should replace

NSString *nameformatString = [NSString stringWithFormat:@"stationName contains[c] '%@'", text];
NSPredicate *namePredicate = [NSPredicate predicateWithFormat:nameformatString];

by

NSPredicate *namePredicate = [NSPredicate predicateWithFormat:@"stationName contains[c] %@", text];

To search within an array, you have to use "ANY" in the predicate:

NSPredicate *aToZPredicate =
  [NSPredicate predicateWithFormat:@"ANY stationSearchData.browseAtozArray.city CONTAINS[c] %@", text];