Replacing one character in a string in Objective-C

objective-c ios string nsstring
RanLearns picture RanLearns · Mar 7, 2011 · Viewed 59.1k times · Source

Hoping somebody can help me out - I would like to replace a certain character in a string and am wondering what is the best way to do this?

I know the location of the character, so for example, if I want to change the 3rd character in a string from A to B - how would I code that?

Answer

theChrisKent picture theChrisKent · Mar 7, 2011

If it is always the same character you can use:

stringByReplacingOccurrencesOfString:withString:

If it is the same string in the same location you can use:

stringByReplacingOccurrencesOfString:withString:options:range:

If is just a specific location you can use:

stringByReplacingCharactersInRange:withString:

Documentation here: https://developer.apple.com/documentation/foundation/nsstring

So for example:

NSString *someText = @"Goat";
NSRange range = NSMakeRange(0,1);
NSString *newText = [someText stringByReplacingCharactersInRange:range withString:@"B"];

newText would equal "Boat"

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