Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Is there any easy way to get the string index in an NSString if I have the line number and column number?
For example:
myString =
abc
def
ghi
[myString getIndexFromLineNumber:2 columnNumber:1] should return the index of h in myString, so in this example it should be 10 (assuming new lines are 1 char long).
There is no default way to do this, so you’re going to have to write a category for NSString.
Take a look at NSScanner, it will help you quite a bit.
Tips:
Wrap the code in the method in a
while (![scanner isAtEnd])to keep scanning through the string in a loop.Use
[scanner scanUpToCharactersFromSet:[NSCharacterSet letterCharacterSet] intoString:NULL]and[scanner scanCharactersFromSet:[NSCharacterSet newlineCharacterSet] intoString:NULL]to skip a line (keep doing this until you’ve reached the line you want, then read the current line and return a given character).