adding a string followed by an int to an array

Question

I am very new to Objective-C with Cocoa, and I need help.

I have a for statement in which I loop i from 1 to 18, and I would like to add an object to an NSMutableArray in this loop. Right now I have:

chapterList = [[NSMutableArray alloc] initWithCapacity:18];
for (int i = 1; i<19; i++)
{
    [chapterList addObject:@"Chapter"+ i];
}

I would like it to add the objects, chapter 1, chapter 2, chapter 3... , chapter 18. I have no idea how to do this, or even if it is possible. Is there a better way? Please Help

Thanks in advance,

You mean you want strings that say Chapter 1, Chapter 2 etc.? — sudo rm -rf
– sudo rm -rf, Commented Mar 21, 2011 at 4:21

Kshitiz Ghimire · Accepted Answer · 2011-03-21 04:18:36Z

3

chapterList = [[NSMutableArray alloc] initWithCapacity:18];
for (int i = 1; i<19; i++)
{
    [chapterList addObject:[NSString stringWithFormat:@"Chapter %d",i]];
}

good luck

answered Mar 21, 2011 at 4:18

Kshitiz Ghimire

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Comments

aroth · Accepted Answer · 2011-03-21 04:56:57Z

2

Try:

[chapterList addObject:[NSString stringWithFormat:@"Chapter %d", i]];

In Objective-C/Cocoa you can't append to a string using the + operator. You either have to use things like stringWithFormat: to build the complete string that you want, or things like stringByAppendingString: to append data to an existing string. The NSString reference might be a useful place to start.

edited Mar 21, 2011 at 4:56

answered Mar 21, 2011 at 4:20

aroth

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Comments

sudo rm -rf · Accepted Answer · 2011-03-21 04:22:49Z

1

If you're wanting strings that merely say Chapter 1, Chapter 2, you can just do this:

chapterList = [[NSMutableArray alloc] initWithCapacity:18];
for (int i = 1; i<19; i++) {
    [chapterList addObject:[NSString stringWithFormat:@"Chapter %d",i]];
}

And don't forget to release the array when you're done, as you're calling alloc on it.

answered Mar 21, 2011 at 4:22

sudo rm -rf

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