CODEWITHSUNDEEP
regexcocoansregularexpression
Jacksonkr
Jacksonkr

Reputation: 32207

ios NSRegularExpression trouble

I'm trying to do a basic regular expression in xcode and it's not cooperating.

NSString *urlString = @"http://www.youtube.com/v/3uyaO745g0s?fs=1&hl=en_US";

NSError *error = nil;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"/.*?v=(.*)&.*/" options:NSRegularExpressionCaseInsensitive error:&error];
NSTextCheckingResult *fmis = [regex firstMatchInString:urlString options:0 range:NSMakeRange(0, [urlString length])];

if(fmis) {
    NSRange match = [fmis range];
    NSLog(@"%i", match.location);
}

essentially, I'm just trying to suck 3uyaO745g0s out of the urlString. I assume a regular expression is the best way? Thanks for looking my question.

** EDIT **

sometimes the url will look like this: http://www.youtube.com/watch?v=3uya0746g0s and I have to capture the vid from that as well.

Upvotes: 1

Views: 381

Answers (2)

hanjae
hanjae

Reputation: 114

There are many types of Youtube URLs. Maybe you can try this

NSString *urlString = @"http://www.youtube.com/v/3uyaO745g0s?fs=1&hl=en_US";
NSString *regEx = @"[a-zA-Z0-9\\-\\_]{11}";
NSRange idRange = [urlString rangeOfString:regEx options:NSRegularExpressionSearch];
NSString *youtubeID = [urlString substringWithRange:idRange];

I found this regular expression here. And you don't have to use NSRegularExpression for simple search:)

I think this is pretty good solution but if you want more reliable result, then try another regular expression in that answer.

Upvotes: 1

Alladinian
Alladinian

Reputation: 35626

I think it's much easier to create an NSURL object and let it do its magic for you:

NSString *urlString = @"http://www.youtube.com/v/3uyaO745g0s?fs=1&hl=en_US";
NSURL *url = [NSURL URLWithString:urlString];

// Since you're targeting the last component of the url
NSString *myMatch = [url lastPathComponent]; //=> 3uyaO745g0s

You can find more on how to access various parts of an NSURL object here

Upvotes: 3

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