CODEWITHSUNDEEP
objective-ciosnspredicate
Parvez Qureshi
Parvez Qureshi

Reputation: 31

iOS: NSPredicate for Custom object as attribute

For an NSObject class A that contains another NSObject class B variable as member, can we make use of NSPredicate to perform a search on an array containing objects of class A by using that member?

Thanks Arnieterm

Upvotes: 0

Views: 1197

Answers (1)

wkhatch
wkhatch

Reputation: 2741

Sounds like you want to filter an existing array of objects of type A where their B member attribute, let's call it objectB, matches a particular value? So, first the predicate:

NSPredicate *predicate =
  [NSPredicate predicateWithFormat:@"objectB == %@", aBInstance ];

And then just filter your source array using the predicate:

NSArray *filtered  = [yourSourceArray filteredArrayUsingPredicate:predicate];

Upvotes: 2

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