CODEWITHSUNDEEP
iosswiftuitextview
husharoonie
husharoonie

Reputation: 441

UITextView .isEmpty not working on keyboard send Swift

Have a UITextView that is submitting character input through the "Send" Button on the keyboard. I have tried all of these below, yet it still makes it through with no characters.

func textView(_ textView: UITextView, shouldChangeTextIn  range: NSRange, replacementText text: String) -> Bool {
    if (text == "\n") {

        if(textView.text != "" || !textView.text.isEmpty){

          print("still printing")
         //**I dont want it to make it here but it does with no characters in textView after clicking send on keyBoard
        //It still makes it here when send button is pressed and textView is null.
            return false
        }

    }
    return true
}

I have tried these and more...

if(textView.text != "" || !textView.text.isEmpty || textView.text == nil)


if textView!.text.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines).isEmpty {
    [...]
}

if (self.textView.text.characters.count > 0) { }

1.) if (text == "\n") means "Send" button has been pressed

2.) if(textView.text != "") checking if textView is null

The textView is null but still makes it through the if statements I have tried above.

Upvotes: 2

Views: 311

Answers (1)

hasan
hasan

Reputation: 24185

To get the new text length you need to use the range and text parameter values as the following:

func textView(_ textView: UITextView, shouldChangeTextIn  range: NSRange, replacementText text: String) -> Bool {
    let insertedText = text.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
    if insertedText.count == 1 {
        textView.text = insertedText
    }

    return false
}

Details: The shouldChangeTextIn is triggered before the text change on the UITextView. That makes sense because the decision for applying the change is taken in this function shouldChangeTextIn?.

Upvotes: 2

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