Question

I am receiving JSON in the following format that I parse and store in a NSArray:

{"4eb57e72c7e24c014f000000":{"_id":{"$id":"4eb57e72c7e24c014f000000"},"author":"tim","comments":[],"created":{"sec":1320517234,"usec":856000},"picture":"http://someurl.com","text":"this is a test","title":"test","type":["test"]}

How do I get it to sort by “created”? “created” has the sec which appears to be the date and usec that appears to be the time.

Any guidance will be appreciated.

Answer 1

Use sortedArrayUsingFunction:context: You’ll need a method that returns “Sec” from your JSON value.

Write A comparison function something like:

NSInteger intSort(id num1, id num2, void *context)
{
    int v1 = [num1 getSecFromJSONValue];
    int v2 = [num2 getSecFromJSONValue];
    if (v1 < v2)
        return NSOrderedAscending;
    else if (v1 > v2)
        return NSOrderedDescending;
    else
        return NSOrderedSame;
}