Check if an NSString is just made out of spaces

Question

I want to check if a particular string is just made up of spaces. It could be any number of spaces, including zero. What is the best way to determine that?

Answer 1

Try this:

[mystring stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

or

[mystring stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];