Filtering NSDictionary with predicate

Question

I am using a NSDictionary that itself contains dictionaries some keys and its values.The format is like ,

{

\"1\" = {
        \"key1\" = \"ss\",
          \         


        

Answer 1

You can use keysOfEntriesPassingTest method of NSDictionary.

Eg.

NSSet *keys = [dict keysOfEntriesPassingTest:^BOOL(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
NSDictionary *object =(obj); 
return ([@"tt" isEqualToString:object[@"key1] &&[@"vv"isEqualToString:object[@"key2"]);
}];

Reference : Apple Doc