Check if string contains number or whitespace

StringContainsNumber.swift

import Foundation


    extension String {
        
        func containsNumbers() -> Bool {
            
            // check if there's a range for a number
            let range = self.rangeOfCharacterFromSet(.decimalDigitCharacterSet())
            
            // range will be nil if no whitespace is found
            if let _ = range {
                return true
            } else {
                return false
            }
            
        }
        
        func containsWhiteSpace() -> Bool {
            
            // check if there's a range for a whitespace
            let range = self.rangeOfCharacterFromSet(.whitespaceCharacterSet())
            
            // range will be nil if no whitespace is found
            if let _ = range {
                return true
            } else {
                return false
            }
        }
    }

let string = "h21312312al112312lo"
print(string.containsNumbers())

Why not change those methods to dynamic vars?

And make them just:

return rangeOfCharacterFromSet(.whatevercharaterset()) != nil