how do i find the range of a string? [duplicate]

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
– rmaddy, Commented Jul 14, 2014 at 4:35
@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
– vzm, Commented Jul 14, 2014 at 4:36
so you want to know how to build your own implementation of searching substrings? — Andrey Chernukha
– Andrey Chernukha, Commented Jul 14, 2014 at 4:37
@vzm Your question is unclear. What exactly don't you understand? What are you trying to do? — rmaddy
– rmaddy, Commented Jul 14, 2014 at 4:38

Kirit Modi · Accepted Answer · 2014-07-14 04:53:45Z

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, 2014 at 4:53

Kirit Modi

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answered Jul 14, 2014 at 4:52

Usman Nisar

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Comments

rmaddy · Accepted Answer · 2014-07-14 04:51:52Z

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, 2014 at 4:51

rmaddy

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answered Jul 14, 2014 at 4:47

Brian Tracy

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