Setting multiple objects

Question

I am struggling to find a shorthand version of the code shown below. Basically I am saving Events into core data. Each event has up to 15 contacts. newEvent is from an Event class.

The code below works great, but I don't want to have it duplicated 15 times for each contact. Is there an easier way?

if ([[selectedContacts objectAtIndex:14] objectAtIndex:0] != (id)[NSNull null]) {
    newEvent.contact15 = [[selectedContacts objectAtIndex:14] objectAtIndex:0];
}
else {
    newEvent.contact15 = @"";
}

Short answer: declare the contactX fields to be a single array and loop through it. — Blagovest Buyukliev
– Blagovest Buyukliev, Commented Jul 9, 2012 at 11:34

nfarshchi · Accepted Answer · 2012-07-09 11:45:12Z

4

You can use this code

-(void) Solve{
    for (int i = 0 ; i < 15 ; i++){
        Contact *con = [newEvent.contacts objectAtIndex:14 - i];
        if ([[selectedContacts objectAtIndex:14 - i] objectAtIndex:0] != (id)[NSNull null]) {
            con = [[selectedContacts objectAtIndex:14 - i] objectAtIndex:0];
        }
        else {
            con = @"";
        }
    }
}

just you should define contact in your newEvent class as Array

answered Jul 9, 2012 at 11:45

nfarshchi

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1 Comment

Patrick Over a year ago

I am not sure how to save an array in core data. But this answer looks great, cheers for the help though :)

hamstergene · Accepted Answer · 2012-07-09 11:38:15Z

0

You could use NSSelectorFromString to translate [NSString stringWithFormat:@"setContact%d", 15] to SEL value and then using performSelector. But ARC won't like that.

You can #define a C macro with this statement, then call it 15 times and immediately #undef it. It will be much shorter, though not pretty.

But the best would be to redesign the class to have single contacts array.

answered Jul 9, 2012 at 11:38

hamstergene

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