UITextView .isEmpty not working on keyboard send Swift

Question

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.

could be throwing it off for some reason but i dont know i tried checking for != "\n" — husharoonie, Mar 13 '18 at 08:15

hasan · Accepted Answer · 2018-03-13T08:39:52.447

2

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?.

edited Mar 13 '18 at 08:39

answered Mar 13 '18 at 08:14

hasan

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so how do I use the newLength message.text.character.count > newLength? – husharoonie Mar 13 '18 at 08:19
your not accounting for "\n" or return true – husharoonie Mar 13 '18 at 08:38
I edit it. we are taking \n in consideration by trimming whitespacesAndNewlines – hasan Mar 13 '18 at 08:40
we don't need to return true. because we are editing the text ourself. textView.text = insertedText – hasan Mar 13 '18 at 08:41
the functionality works. But when characters are entered it performs "\n" action rather then making it in – husharoonie Mar 14 '18 at 05:48
try it your self with a text view. and the return button – husharoonie Mar 14 '18 at 05:59
I did try it. it works fine and when I click the return button nothing happen. isn't that what you want? – hasan Mar 14 '18 at 07:06
I don't know why you are using textview anyway. you should be using textfield. – hasan Mar 14 '18 at 07:08

UITextView .isEmpty not working on keyboard send Swift

1 Answers1