Replacing one character in a string in Objective-C
Objective CIosStringNsstringObjective C Problem Overview
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?
Objective C Solutions
Solution 1 - Objective C
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"
Solution 2 - Objective C
NSString *str = @"123*abc";
str = [str stringByReplacingOccurrencesOfString:@"*" withString:@""];
//str now 123abc
Solution 3 - Objective C
Here is the code:
[aString stringByReplacingCharactersInRange:NSMakeRange(3,1) withString:@"B"];
Solution 4 - Objective C
Use the replaceCharactersInRange: withString: message on a NSMutableString object.