Finding a substring in an NSString object

Question

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

For example, my line is: “The dog ate the cat”, I want the program to find the word “ate” and create a substring that will be “cat”.

Can someone help me or give me an example?

Thank,

Sagiftw

Answer 1

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

Answer 2

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

If you want to trim spaces, you can do it separately.

Answer 3

How about this? It is almost the same. But maybe the meaning of NSRange is easier for beginners to understand if he writes like this.

Finally, this is the same jtbandes solution

  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]; 

Answer 4

Try it.

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

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

Answer 5

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

You can find the string and then get the search string in another string ...

Answer 6

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

Answer 7

You can use either of the two methods provided in the NSString class, for example substringToIndex: and substringFromIndex: Pass it NSRange as the length and location, and you will get the desired result.