CODEWITHSUNDEEP
cocoansstring
jbrennan
jbrennan

Reputation: 12003

NSString Range or Index out of bounds

For some reason this is tripping me up today.

I've got an NSString I'm trying to search using -rangeOfString:options:range: and I keep getting this exception. What I'm doing:

I'm searching the string trying to find the next newline character after a certain character index (so, given an index i, find the next occurrence of @"\n" after that). I have i, now I'm searching for the next newline like so (this is in an NSTextView subclass)

NSRange untilReturn = [wholeString rangeOfString:@"\n" options:kNilOptions range:NSMakeRange(startLocation, [wholeString length] - 1)];

Where wholeText is the whole text of the textView and startLocation is i.

But when I run this I get an out of bounds exception and I can't seem to figure out what's going wrong. Can someone lend a hand?

Upvotes: 0

Views: 2945

Answers (2)

jbrennan
jbrennan

Reputation: 12003

It's simple! In my particular case, I was much better off using the method -lineRangeForRange:. I'd totally forgotten about that API. So the code looks like the following:

NSRange lineRange = [wholeString lineRangeForRange:originalRange];
NSString *lineString = [wholeString substringWithRange:lineRange];

Upvotes: 0

mipadi
mipadi

Reputation: 410622

The second parameter to NSMakeRange is the length (from the first parameter). Unless startLocation is always 0 (and I assume it's not), your length is going to be too long. You actually want the second parameter to be [wholeString length] - startLocation).

Upvotes: 2

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