Swift: a button to change the text in the UItextView?

Question

I am trying to implement a button to trigger the original text I have in the UItextView. I have looked at this post: Trigger button to change text in UITextView in swift3 xcode 8 ios 10

and followed it I realized it only worked for UItextField. Since I need to wrap the my text, I am wondering is that possible to do the similar action with UItextView?

Currently, I have:

@IBOutlet var Textfield: UITextView!
@IBOutlet var ChangingText: [UIButton]!


@IBAction func ChangingTextTapped(_ sender: Any) {
        Textfield.text = "Changing text here"
    }

But I got the following error:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM setText:]: unrecognized selector sent to instance 0x282d15b90'

Thanks in advance!

Solution: It works well following the suggestion from Dejan Atanasov:

 @IBOutlet var Textfield: UITextView!
    @IBOutlet var ChangingText: UIButton!


    @IBAction func ChangingTextTapped(_ btn: UIbutton) {
            Textfield.text = "Changing text here"
        }`

score 3 · Accepted Answer · answered Jun 07 '20 at 18:02

3

For changing the UITextView text by pressing on a button you will need the following code:

@IBOutlet fileprivate weak var textView: UITextView!
@IBOutlet fileprivate weak var changeTextBtn: UIButton!


@IBAction func onChangeTextButton(_ btn: UIButton){
    textView.text = "Change text to something else!"
}

Connect the @IBAction with the button in the Interface Builder and make sure you select the Touch Up Inside event (see screenshot). That's it!

This is the result when I click on the button:

answered Jun 07 '20 at 18:02

Dejan Atanasov

1,202
10
13

It works very well! Thank you! I think changing _btn: UIbutton is the key! – swiftlearneer Jun 07 '20 at 20:20
Could I can ask you a follow up question? If I have multiple text line that I want to change using the same button, could I add more lines of textView.text = "Change1!", textView.text = "Change2!" like this? Would it be possible? – swiftlearneer Jun 07 '20 at 20:22
No, you can't call textVew.text twice, it will just overwrite the previous value. If you want to add text in a new line, you should use textView.text = "Change1!\nChange2!". – Dejan Atanasov Jun 08 '20 at 05:50

score 1 · Answer 2 · answered Jun 07 '20 at 18:23

1

No need to add array of buttons.

@IBOutlet weak var textViewDemo: UITextView!

@IBAction func upgradeBtnTapped(_ sender: Any) {

textViewDemo.text = "Set Something else"
}

answered Jun 07 '20 at 18:23

Jaykant

349
4
11

score 0 · Answer 3 · answered Jun 07 '20 at 18:08

0

The Issue with your code was the following line:

@IBOutlet var ChangingText: [UIButton]!

Your have declared your button as an array of UIButtons by enclosing UIButton in Brackets...[UIButton]. Simply remove the brackets.

answered Jun 07 '20 at 18:08

Martin Muldoon

3,388
4
24
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Swift: a button to change the text in the UItextView?

3 Answers3