adding a string followed by an int to an array

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 = [[NSMutableArra开发者_如何学JAVAy 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,

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

good luck

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.

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.