Objective-C: Find numbers in string

Question

I have a string that contains words as well as a number. How can I extract that number from the string?

NSString *str = @\"This is my string. #1234\";


        

Answer 1

Swift extension for getting number from string

extension NSString {

func getNumFromString() -> String? {

    var numberString: NSString?
    let thisScanner = NSScanner(string: self as String)
    let numbers = NSCharacterSet(charactersInString: "0123456789")
    thisScanner.scanUpToCharactersFromSet(numbers, intoString: nil)
    thisScanner.scanCharactersFromSet(numbers, intoString: &numberString)
    return numberString as? String;
}
}