CODEWITHSUNDEEP
swifttextbox
Gokhan Dilek
Gokhan Dilek

Reputation: 4402

How to check if a text field is empty or not in swift

I am working on the code below to check the textField1 and textField2 text fields whether there is any input in them or not.

The IF statement is not doing anything when I press the button.

 @IBOutlet var textField1 : UITextField = UITextField()
 @IBOutlet var textField2 : UITextField = UITextField()
 @IBAction func Button(sender : AnyObject) 
  {

    if textField1 == "" || textField2 == "" 
      {

  //then do something

      }  
  }

Upvotes: 62

Views: 168428

Answers (17)

abdallah eslah
abdallah eslah

Reputation: 209

best practice for nil or empty spaces TextField validation

  • actually you can by this code check after removing white spaces text is still empty or not + plus check textField text is nil or not
guard let theHabitTextField = habitNameTextField.text, !theHabitTextField.isEmpty,!theHabitTextField.trimmingCharacters(in: .whitespaces).isEmpty
        else{
            Helper.showAlert(title: "Empty Field !", message: "Please Type Your Habit..", in: self)
            return
        }

Upvotes: -1

Dan Alboteanu
Dan Alboteanu

Reputation: 10252

use this extension 

extension String {
    func isBlankOrEmpty() -> Bool {

      // Check empty string
      if self.isEmpty {
          return true
      }
      // Trim and check empty string
      return (self.trimmingCharacters(in: .whitespaces) == "")
   }
}

like so 

// Disable the Save button if the text field is empty.
let text = nameTextField.text ?? ""
saveButton.isEnabled = !text.isBlankOrEmpty()

Upvotes: 5

Rana Ali Waseem
Rana Ali Waseem

Reputation: 130

Swift 4.2

You can use a general function for your every textField just add the following function in your base controller

// White space validation.
func checkTextFieldIsNotEmpty(text:String) -> Bool
{
    if (text.trimmingCharacters(in: .whitespaces).isEmpty)
    {
        return false

    }else{
        return true
    }
}

Upvotes: 3

laplace
laplace

Reputation: 876

Swift 4/xcode 9

IBAction func button(_ sender: UIButton) {
        if (textField1.text?.isEmpty)! || (textfield2.text?.isEmpty)!{
                ..............
        }
}

Upvotes: 0

Hemang
Hemang

Reputation: 27072

Swift 4.x Solution

@IBOutlet var yourTextField: UITextField!

 override func viewDidLoad() {
     ....
     yourTextField.addTarget(self, action: #selector(actionTextFieldIsEditingChanged), for: UIControlEvents.editingChanged)
  }

 @objc func actionTextFieldIsEditingChanged(sender: UITextField) {
     if sender.text.isEmpty {
       // textfield is empty
     } else {
       // text field is not empty
     }
  }

Upvotes: 2

Leszek Szary
Leszek Szary

Reputation: 10346

As now in swift 3 / xcode 8 text property is optional you can do it like this:

if ((textField.text ?? "").isEmpty) {
    // is empty
}

or:

if (textField.text?.isEmpty ?? true) {
    // is empty
}

Alternatively you could make an extenstion such as below and use it instead:

extension UITextField {
    var isEmpty: Bool {
        return text?.isEmpty ?? true
    }
}

...

if (textField.isEmpty) {
    // is empty
}

Upvotes: 6

Alexandre G.
Alexandre G.

Reputation: 1779

if let ... where ... {

Swift 3:

if let _text = theTextField.text, _text.isEmpty {
    // _text is not empty here
}

Swift 2:

if let theText = theTextField.text where !theTextField.text!.isEmpty {
    // theText is not empty here
}

guard ... where ... else {

You can also use the keyword guard :

Swift 3:

guard let theText = theTextField.text where theText.isEmpty else {
    // theText is empty
    return // or throw
}

// you can use theText outside the guard scope !
print("user wrote \(theText)")

Swift 2:

guard let theText = theTextField.text where !theTextField.text!.isEmpty else {
    // the text is empty
    return
}

// you can use theText outside the guard scope !
print("user wrote \(theText)")

This is particularly great for validation chains, in forms for instance. You can write a guard let for each validation and return or throw an exception if there's a critical error.

Upvotes: 6

Alex Brashear
Alex Brashear

Reputation: 864

I used UIKeyInput's built in feature hasText: docs

For Swift 2.3 I had to use it as a method instead of a property (as it is referenced in the docs):

if textField1.hasText() && textField2.hasText() {
    // both textfields have some text
}

Upvotes: 2

Brian Tracy
Brian Tracy

Reputation: 6831

Simply comparing the textfield object to the empty string "" is not the right way to go about this. You have to compare the textfield's text property, as it is a compatible type and holds the information you are looking for.

@IBAction func Button(sender: AnyObject) {
    if textField1.text == "" || textField2.text == "" {
        // either textfield 1 or 2's text is empty
    }
}

Swift 2.0:

Guard:

guard let text = descriptionLabel.text where !text.isEmpty else {
    return
}
text.characters.count  //do something if it's not empty

if:

if let text = descriptionLabel.text where !text.isEmpty
{
    //do something if it's not empty  
    text.characters.count  
}

Swift 3.0:

Guard:

guard let text = descriptionLabel.text, !text.isEmpty else {
    return
}
text.characters.count  //do something if it's not empty

if:

if let text = descriptionLabel.text, !text.isEmpty
{
    //do something if it's not empty  
    text.characters.count  
}

Upvotes: 182

Corey Kennedy
Corey Kennedy

Reputation: 67

Okay, this might be late, but in Xcode 8 I have a solution:

if(textbox.stringValue.isEmpty) {
    // some code
} else {
    //some code
}

Upvotes: 2

joel prithivi
joel prithivi

Reputation: 340

It's too late and its working fine in Xcode 7.3.1

if _txtfield1.text!.isEmpty || _txtfield2.text!.isEmpty {
        //is empty
    }

Upvotes: 0

Ali Asgher Lakkadshaw
Ali Asgher Lakkadshaw

Reputation: 1

Easy way to Check 

if TextField.stringValue.isEmpty {

}

Upvotes: -1

Edison
Edison

Reputation: 11987

A compact little gem for Swift 2 / Xcode 7

@IBAction func SubmitAgeButton(sender: AnyObject) {

    let newAge = String(inputField.text!)        

if ((textField.text?.isEmpty) != false) {
        label.text = "Enter a number!"
    }
    else {
        label.text = "Oh, you're \(newAge)"

        return
    }

    }

Upvotes: 4

raphael
raphael

Reputation: 807

another way to check in realtime textField source :

 @IBOutlet var textField1 : UITextField = UITextField()

 override func viewDidLoad() 
 {
    ....
    self.textField1.addTarget(self, action: Selector("yourNameFunction:"), forControlEvents: UIControlEvents.EditingChanged)
 }

 func yourNameFunction(sender: UITextField) {

    if sender.text.isEmpty {
      // textfield is empty
    } else {
      // text field is not empty
    }
  }

Upvotes: 12

Naveed Ahmad
Naveed Ahmad

Reputation: 6747

I just tried to show you the solution in a simple code

@IBAction func Button(sender : AnyObject) {
 if textField1.text != "" {
   // either textfield 1 is not empty then do this task
 }else{
   //show error here that textfield1 is empty
 }
}

Upvotes: 0

jfredsilva
jfredsilva

Reputation: 1450

Maybe i'm a little too late, but can't we check like this:

   @IBAction func Button(sender: AnyObject) {
       if textField1.text.utf16Count == 0 || textField2.text.utf16Count == 0 {

       }
    }

Upvotes: 2

UnRewa
UnRewa

Reputation: 2472

Better and more beautiful use 

 @IBAction func Button(sender: AnyObject) {
    if textField1.text.isEmpty || textField2.text.isEmpty {

    }
}

Upvotes: 51

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