Finding a substring in a NSString object

Question

I have an NSString object and I want to make a substring from it, by locating a word.

For example, my string is: "The dog ate the cat", I want the program to locate the word "ate" and make a substring that will be "the cat".

Can someone help me out or give me an example?

Thanks,

Sagiftw

score 83 · Accepted Answer · answered Aug 31 '10 at 22:11

83

NSRange range = [string rangeOfString:@"ate"];
NSString *substring = [[string substringFromIndex:NSMaxRange(range)] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

answered Aug 31 '10 at 22:11

Joost

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I know this topic is old, but FWIW, you can also use rangeOfString:options: where in options you use NSCaseInsensitiveSearch if case is an issue. That is, if a user could enter a string in any case, and you just want to know whether a pattern is there, regardless of case, you would use the case-insensitive search. – GTAE86 Nov 15 '13 at 21:56

score 16 · Answer 2 · answered Aug 31 '10 at 22:11

16

NSString *str = @"The dog ate the cat";
NSString *search = @"ate";
NSString *sub = [str substringFromIndex:NSMaxRange([str rangeOfString:search])];

If you want to trim whitespace you can do that separately.

answered Aug 31 '10 at 22:11

jtbandes

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score 8 · Answer 3 · answered Feb 05 '13 at 13:08

What about this way? It's nearly the same. But maybe meaning of NSRange easier to understand for beginners, if it's written this way.

At last, it's the same solution of jtbandes

    NSString *szHaystack= @"The dog ate the cat";
    NSString *szNeedle= @"ate";
    NSRange range = [szHaystack rangeOfString:szNeedle];
    NSInteger idx = range.location + range.length;
    NSString *szResult = [szHaystack substringFromIndex:idx];

score 3 · Answer 4 · edited Sep 04 '15 at 16:10

3

Try this one..

BOOL isValid=[yourString containsString:@"X"];

This method return true or false. If your string contains this character it return true, and otherwise it returns false.

edited Sep 04 '15 at 16:10

josliber

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answered Sep 04 '15 at 13:26

Sumit Sharma

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Be aware that this will work only on iOS 8.0 and higher. – Werewolf May 17 '16 at 11:41

score 2 · Answer 5 · edited Jun 02 '12 at 15:20

2

NSString *theNewString = [receivedString substringFromIndex:[receivedString rangeOfString:@"Ur String"].location];

You can search for a string and then get the searched string into another string...

edited Jun 02 '12 at 15:20

Garoal

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answered May 11 '12 at 07:00

Pradeep Reddy Kypa

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score 1 · Answer 6 · edited Dec 17 '13 at 07:05

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-(BOOL)Contains:(NSString *)StrSearchTerm on:(NSString *)StrText
{
   return  [StrText rangeOfString:StrSearchTerm options:NSCaseInsensitiveSearch].location==NSNotFound?FALSE:TRUE;
}

edited Dec 17 '13 at 07:05

Nazik

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answered Dec 17 '13 at 06:39

Sandeep Singh

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score 0 · Answer 7 · edited Sep 09 '16 at 20:42

0

You can use any of the two methods provided in NSString class, like substringToIndex: and substringFromIndex:. Pass a NSRange to it as your length and location, and you will have the desired output.

edited Sep 09 '16 at 20:42

Aviram

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answered Sep 04 '15 at 17:59

Abhishek Bhardwaj

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Finding a substring in a NSString object

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