NSString regex string matching/search

Question

I have a string like @"random ++qwerty/asdf" and I want to fish out the qwerty part. The "random ++" and "/asdf" will always be the same. How would I go about doing this using regular expressions? I'm confused as to how they work.

i will take a look here, hte nsregularexpression documentation is really confusing — Hudson Buddy
– Hudson Buddy, Commented Apr 25, 2013 at 0:00
Admittedly, regular expressions are something that isn't intuitive enough to be easily learned from reading a documentation. However, if you take some time and read through the linked tutorial (at least the first few chapters) you'll get a really good grasp on it - and it's definitely valuable knowledge. — Martin Ender
– Martin Ender, Commented Apr 25, 2013 at 0:04
BOOL isRightFormat = [string rangeOfString: @"random ++"].location == 0; — Jano
– Jano, Commented Apr 25, 2013 at 0:33

Thilina Chamath Hewagama · Accepted Answer · 2013-05-10 20:00:34Z

15

Problem Solved !!

This code give exactly what you want,

NSString *yourString = @"random ++qwerty/asdf random ++derty/asdf random ++noty/asdf";
NSError *error = NULL;

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"random \\+\\+(\\w+)/asdf" options:NSRegularExpressionCaseInsensitive error:&error];


[regex enumerateMatchesInString:yourString options:0 range:NSMakeRange(0, [yourString length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){

    // detect
    NSString *insideString = [yourString substringWithRange:[match rangeAtIndex:1]];

    //print
    NSLog(@"%@",insideString);

}];

Output:
qwerty
derty
noty

answered May 10, 2013 at 20:00

Thilina Chamath Hewagama

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1 Comment

SaltyNuts Over a year ago

With so many resources available on regex usage, it still helps a lot to have concrete examples like this about specific types of matches! Thanks!

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