Finding Substrings in Objective-C

It’s times like this, that I miss ruby.

I’m checking a url to see if it has a substring. It would be so easy if this was ruby:

absolute_url.match(/my regex/).any?

In Objective C, you have to use rangeOfString which returns a range. If I were to run this on the string “the quick brown fox” with an argument of “brown” it would return {10,14}. If it’s not found, it would return {NSNotFound, 0}. Let’s use that to check to see if the range was found. We’ll use NSMakeRange to create the NSNotFound range and NSEqualRanges to compare them:

if(NSEqualRanges(NSMakeRange(NSNotFound, 0), [absoluteURL rangeOfString:@"my_substring"])){   NSLog(@"my_substring not found in absoluteURL %@", absoluteURL);}