Question

How can I replace newline (\n) sequences with one space.

I.e the user has entered a double newline (“\n\n”) I want that replaced with one space (” “). Or the user has entered triple newlines (“\n\n\n”) I want that replaced with also one space (” “).

Answer 1

Try this:

NSArray *split = [orig componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
split = [split filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"length > 0"]];
NSString *res = [split componentsJoinedByString:@" "];

This is how it works:

• First line splits by newline characters
• Second line removes empty items inserted for multiple separators in a row
• Third line joins the strings back using a single space as the new separator