Another Bronze Solution

[AJGolf]

Here is my crack at it… a little messy maybe, but at a quick glance it’s a little different than what’s been posted so far. But this code does work.

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    let invertedSet = NSCharacterSet(charactersIn:"0123456789").inverted
    let components = string.components(separatedBy: invertedSet)
    let filtered = components.joined(separator: "")
    
    if filtered == string {
        return true
    } else {
        if string == "." {       
            let numberofdots = textField.text!.components(separatedBy:".").count
            if numberofdots == 1 {
                return true
            } else {                  
                if numberofdots > 1 && string == "." {
                    return false                
                } else {            
                    return true
                }
            }
        } else {
          
            return false
        }
    }
}