CODEWITHSUNDEEP
iphoneobjective-csortingnsarray
Josh Kahane
Josh Kahane

Reputation: 17169

How to sort array of CoreData objects by integer attributes?

I have an array of CoreData objects, each object is Person and each Person has an age attribute which is of type Integer32.

My array is filled with Person objects. I want to sort my array by their age attribute.

How can I do this?

Upvotes: 4

Views: 2183

Answers (2)

Paul.s
Paul.s

Reputation: 38728

It should be as simple as:

NSArray *sortDescriptors = @[
  [NSSortDescriptor sortDescriptorWithKey:@"age" ascending:YES]
];

NSArray *sortedPeople = [people sortedArrayUsingDescriptors:sortDescriptors];
NSLog(@"%@", sortedPeople);

This will work regardless of whether you do or do not choose to "Use scalar properties for primitive data types" when creating your NSManagedObject subclass (if you decide to even create them)

Upvotes: 8

ghostatron
ghostatron

Reputation: 2650

Say "people" is your array of Person objects you want sorted...

NSArray *sortedPeople = [people sortedArrayUsingComparator:^NSComparisonResult(Person *p1, Person *p2) {
    if (p1.age > p2.age) return NSOrderedDescending;
    else if (p1.age < p2.age) return NSOrderedAscending;
    else return NSOrderedSame;
}

Upvotes: 0

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