CODEWITHSUNDEEP
iosswiftcore-datauibutton
Stefan
Stefan

Reputation: 936

Handling no text in textField (swift 3)

I have a basic chat application and I want it so that when inputTextField.text == nil nothing no information gets sent from the textField. The solution I attempted was to disable the button if inputTextField.text == nil but that proved futile. Below is the both the instantiation of the button and the function that handles the send. I have included a screen shot of the build that shows what it looks like when inputTextField.text == nil.

screenshot

I do not want the chat bubbles to show.

Any suggestions?

lazy var sendButton: UIButton = {
    let button = UIButton(type: .system)
    button.setTitle("Send", for: UIControlState())
    let titleColor = UIColor(red: 0, green: 137/255, blue: 249/255, alpha: 1)
    button.setTitleColor(titleColor, for: UIControlState())
    button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
    button.addTarget(self, action: #selector(handleSend), for: .touchUpInside)
    return button
}()

func handleSend(){
    print(inputTextField)

    let delegate = UIApplication.shared.delegate as! AppDelegate
    let context = delegate.managedObjectContext

    if inputTextField.text == nil {
        sendButton.isEnabled = false
    }else{
        FriendsController.createMessageWithText(inputTextField.text!, friend: friend!, minutesAgo: 0, context: context, isSender: true)
    }

    do{

        try context.save()
        inputTextField.text = nil

    }catch let err {
        print(err)
    }

}

Upvotes: 0

Views: 1151

Answers (5)

Sunil Prajapati
Sunil Prajapati

Reputation: 473

Please set UITextField Delegate method shouldChangeCharactersInRange and you can handle when no text then disable and enable

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

    if textField.text?.characters.count == 0{
        sendButton.isEnabled = false
    }else{
        sendButton.isEnabled = true
    }
    return true
}

I hope it's working for you!.

Upvotes: 0

Devika S
Devika S

Reputation: 42

You can check if the textfield is empty on your handleSend() function. This will trim the extra spaces before and after the input string as well

let inputString = inputTextField.text
if(inputString.trimmingCharacters
   (in:CharacterSet.whitespacesAndNewlines) ?? "").isEmpty {
     print("String is nil or empty")
}else {
    //do your code for sending the data
}

Upvotes: 1

James Rochabrun
James Rochabrun

Reputation: 4377

If there is no text in the input text field it doesn't mean that is nil , is just blank, you can check for the textfield.text.characters.count and see that is bigger than 0

Upvotes: 0

Sree
Sree

Reputation: 539

You can achieve that by using sent event Editing Changed of UITextField.

@IBAction func textFieldDidChanged(_ sender: UITextField) {
     if sender.text == "" {
         sendButton.isEnabled = false
     } else {
         sendButton.isEnabled = true
     }
}

Hope this helps.

Upvotes: 0

Garima Saini
Garima Saini

Reputation: 173

This is not a big deal according to me.You can just check if inputTextField.text == "".And whenever there will be no text then your requirement will be fullfilled. Hope it will help you.

Upvotes: 0

Related Questions