How to determine which textfield is active swift

You can declare a UITextField property in your class, and assign the current text field to it in textFieldDidBeginEditing.Then you can just call this text field whenever you need to.

class ViewController : UIViewController, UITextFieldDelegate {   var activeTextField = UITextField()   // Assign the newly active text field to your activeTextField variable   func textFieldDidBeginEditing(textField: UITextField) {        self.activeTextField = textField   }   // Call activeTextField whenever you need to   func anotherMethod() {       // self.activeTextField.text is an optional, we safely unwrap it here       if let activeTextFieldText = self.activeTextField.text {             print("Active text field's text: \(activeTextFieldText)")             return;       }       print("Active text field is empty")   }}

In swift 4:

you can get the active UITextField like that

extension UIView {func getSelectedTextField() -> UITextField? {    let totalTextFields = getTextFieldsInView(view: self)    for textField in totalTextFields{        if textField.isFirstResponder{            return textField        }    }    return nil}func getTextFieldsInView(view: UIView) -> [UITextField] {    var totalTextFields = [UITextField]()    for subview in view.subviews as [UIView] {        if let textField = subview as? UITextField {            totalTextFields += [textField]        } else {            totalTextFields += getTextFieldsInView(view: subview)        }    }    return totalTextFields}}

and then you call it like that

let current = view.getSelectedTextField()

In order to improve @Reimond's answer Swift 4

extension UIView {    var textFieldsInView: [UITextField] {        return subviews            .filter ({ !($0 is UITextField) })            .reduce (( subviews.compactMap { $0 as? UITextField }), { summ, current in                return summ + current.textFieldsInView        })    }    var selectedTextField: UITextField? {        return textFieldsInView.filter { $0.isFirstResponder }.first    }}

usage:

view.selectedTextField