Coredata how to change default NSSet to NSMutableArray

NSSet

has a method allObjects

that returns NSArray

.

To get NSMutableArray

, you can do this:

NSMutableArray *array = [NSMutableArray arrayWithArray:myCoreDataObject.mySet.allObjects];

      

        
        
        
      

    

Note: the order is not guaranteed to be the same every time (sets are not ordered). If order is important to you, consider NSOrderedSet

.

See also docs on NSSet

:

https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSSet_Class/Reference/Reference.html

PS:

The reason you are getting the error is:

NSSet

(or _NSFaultingMutableSet

for that matter) doesn't have a method called filteredArrayUsingPredicate

.