How to get all the textfields from a view in swift - ios

Question

I have a view which has more than 15 UITextFields. I have to set bottomBorder(extension) for all the UITextFields. I can set it one by one for all the UITextFields and its working too. I want to set the bottom border for all the UITextFields at once. Here is the code I am trying but it seems like that for loop is not executing. I have even tried it in viewDidLayoutSubViews but for loop not executing there too.
override func viewDidLoad()
{
super.viewDidLoad()
/** setting bottom border of textfield**/
for case let textField as UITextField in self.view.subviews {
textField.setBottomBorder()
}
}

Answer 1

Swift: This function will return all text-fields in a view. No matter if field exists in any subview. ;-)
func getAllTextFields(fromView view: UIView)-> [UITextField] {
return view.subviews.flatMap { (view) -> [UITextField] in
if view is UITextField {
return [(view as! UITextField)]
} else {
return getAllTextFields(fromView: view)
}
}.flatMap({$0})
}
Usage:
getAllTextFields(fromView : self.view).forEach{($0.text = "Hey dude!")}
Generic Way:
func getAllSubviews<T: UIView>(fromView view: UIView)-> [T] {
return view.subviews.map { (view) -> [T] in
if let view = view as? T {
return [view]
} else {
return getAllSubviews(fromView: view)
}
}.flatMap({$0})
}
Usage:
let textFields: [UITextField] = getAllSubviews(fromView: self.view)

Answer 2

I made it working, but still need the explanation why the code in question is not working
I got it from somewhere on the forum, not exactle able to credit the answer.
/** extract all the textfield from view **/
func getTextfield(view: UIView) -> [UITextField] {
var results = [UITextField]()
for subview in view.subviews as [UIView] {
if let textField = subview as? UITextField {
results += [textField]
} else {
results += getTextfield(view: subview)
}
}
return results
Call the above function in viewDidLoad or viewDidLayoutSubviews.
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
/** setting bottom border to the textfield **/
let allTextField = getTextfield(view: self.view)
for txtField in allTextField
{
txtField.setBottomBorder()
}
}

Answer 3

extension:
extension UIView {
func viewOfType<T:UIView>(type:T.Type, process: (_ view:T) -> Void)
{
if let view = self as? T
{
process(view)
}
else {
for subView in subviews
{
subView.viewOfType(type:type, process:process)
}
}
}
}
Usage:
view.viewOfType(type:UITextField.self) {
view in
view.text = "123"
}

Answer 4

try this
for aSubView: Any in self.view.subviews {
if (aSubView is UITextField) {
var textField = (aSubView as! UITextField)
textField. setBottomBorder()
}
}
or try this
for view in self.view.subviews {
if (view is UITextField) {
var textField = view as! UITextField
textField. setBottomBorder()
}
}

Answer 5

Try this :)
for view in self.view.subviews as! [UIView] {
if let textField = view as? UITextField {
textField.setBottomBorder()
}
}

Answer 6

This worked for me.
var textFieldsArray = [UITextField]()
for view in self.view.subviews {
if view is UITextField {
textFieldsArray.append(view as! UITextField)
}
}
textFieldsArray.forEach { $0.setBottomBorder() }
If you want to get the result of the function applied in a new array, use map() instead.

Answer 7

func getTextFields() {
for textField in view.subviews where view is UITextField {
(textField as? UITextField).setBottomBorder()
}
}

Answer 8

Swift 5
A Very simple answer you can understand easyly
: - You can handle all kind of Objects like UILable, UITextfields, UIButtons, UIView, UIImages . any kind of objecs etc.
for subviews in self.view.subviews {
if subviews is UITextField
{
//MARK: - if the sub view is UITextField you can handle here
funtextfieldsetting(textfield: subviews as! UITextField)
}
if subviews is UIButton
{
//MARK: - if the sub view is UIButton you can handle here
funbuttonsetting(button: subviews as! UIButton)
}
if subviews is UILabel
{
//MARK: - if the sub view is UILabel you can handle here
//Any thing you can do it with label or textfield etc
}
}