how do i find the range of a string?

Question

cant seem to be able to get it right..

I am trying to get the range of "Log in" but I just cant figure it out, this is what I am trying so far without result

NSString *alreadyHaveAccount = @"Already have an account? Log in";

const NSRange range = NSMakeRange(5, 7);

Don't you want `NSRange range = [alreadyHaveAcount rangeOfString:@"Log in"];`? — rmaddy, Jul 14 '14 at 04:35
@rmaddy no I do, and that works..I am just trying to figure out myself, for my own benefit how to get ranges... i just can't wrap my head around them — vzm, Jul 14 '14 at 04:36
http://stackoverflow.com/questions/16998478/find-range-of-substring-of-string — Yogendra, Jul 14 '14 at 04:36
so you want to know how to build your own implementation of searching substrings? — Andrey Chernukha, Jul 14 '14 at 04:37
@vzm Your question is unclear. What exactly don't you understand? What are you trying to do? — rmaddy, Jul 14 '14 at 04:38
The first argument is `start` and the second is `length`. So you probably want 25 and 6. — jtbandes, Jul 14 '14 at 04:39
@rmaddy, I simply do not understand ranges. I would like to know how to figure out ranges. That is what I do not understand, I want to be able to tell ranges from A TO B by looking at the string. — vzm, Jul 14 '14 at 04:40
Use the range because it is apple struct defined to perform task on string.With NSRange you can do more operation than only search. Read this link for more details: http://nshipster.com/nsrange/ — hahv, Jul 14 '14 at 04:44
@Rmaddy thank you, sorry for not being clear, but that is exactly what i wanted to know. — vzm, Jul 14 '14 at 04:45
I think this question is related with this question http://stackoverflow.com/questions/24729244/how-to-get-a-string-to-contain-one-font-for-one-part-and-another-font-for-part — Yogesh Suthar, Jul 14 '14 at 04:45

score 2 · Accepted Answer · edited Jul 14 '14 at 04:53

2

Check this out:

NSRange range = [alreadyHaveAccount rangeOfString:@"Log in"];

if (range.location == NSNotFound) {
    NSLog(@"The string (alreadyHaveAccount) does not contain 'Log in' as a substring");
}
else {
    NSLog(@"Found the range of the substring at (%d, %d)", range.location, range.location + range.length);        
}

edited Jul 14 '14 at 04:53

Kirit Modi

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answered Jul 14 '14 at 04:52

Usman Nisar

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score 1 · Answer 2 · edited Jul 14 '14 at 04:51

1

Use the NSString method - (NSRange)rangeOfString:(NSString *)aString.

In your case, the implementation would look like this.

NSString *alreadyHaveAccount = @"Already have an account? Log in";
NSRange rangeOfLogIn = [alreadyHaveAcount rangeOfString:@"Log in"];

Edit: If you wanted help creating your own method, you should have specified that.

edited Jul 14 '14 at 04:51

rmaddy

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answered Jul 14 '14 at 04:47

Brian Tracy

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how do i find the range of a string?

2 Answers2