NSMutableArray sort with object

Question

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How to sort an NSMutableArray with custom objects in it?

i have a object with Type of NSObject contains "posts" object type of NSMutableArray. that post object has ID property.

MyObject.posts.post.ID = NSInteger;

I want to sort "posts" NSMutableArray by ID. i have tried couple ways but couldn't be success. any help/sample would be great.

thank you.

Could you please post some code of the things you tried? It is usually much easier to pinpoint problems in your code than to write something up from scratch. — Sergey Kalinichenko, Dec 04 '11 at 19:27

score 1 · Accepted Answer · edited May 23 '17 at 10:08

1

You can implement a compare method, or use NSSortDescriptor.

This question and the answer may helps you.

How to sort an NSMutableArray with custom objects in it?

edited May 23 '17 at 10:08

Community

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answered Dec 04 '11 at 19:25

virushuo

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Please don't simply post links to other questions as answers. Leave a comment and flag this question as a duplicate. – jscs Dec 04 '11 at 23:16

score 1 · Answer 2 · answered Dec 04 '11 at 19:43

You can sort an array with a block using NSComparator (NSComparator)

Definition of -sortedArrayUsingComparator: found here

MyObject.posts = [MyObject.posts sortedArrayUsingComparator:^(id obj1, id obj2) {
  if (obj1.post.ID > obj2.post.ID)
    return (NSComparisonResult)NSOrderedDescending;
  if (obj1.post.ID < obj2.post.ID)
    return (NSComparisonResult)NSOrderedAscending;
  return (NSComparisonResult)NSOrderedSame;
}];

NSMutableArray sort with object

2 Answers2