CODEWITHSUNDEEP
stringswiftappenduitextview
SNos
SNos

Reputation: 3470

Swift - Update UITextView with string using IBAction without deleting old string

I am trying to send and update strings inside a UITextView using and IBAction button.

the code below works fine however, every time i push the button the old text is replaced with the new one. What I am trying to do is to always append the text to the exiting one.

Any Idea?

@IBAction func equalPressed(sender: AnyObject) {

        var resultString:String = "new string"

        textView.text = resultString.stringByAppendingString("= " + resultLabel.text! + ";")

    }

Upvotes: 0

Views: 994

Answers (1)

andyvn22
andyvn22

Reputation: 14824

You already know how to append strings, but you're doing it two different ways. The stringByAppendingString(_:) method is fine, but Swift's + operator is clearer. I'd rewrite your existing method as follows:

@IBAction func equalPressed(sender: AnyObject) {
    let resultString = "new string"
    textView.text = resultString + "= " + resultLabel.text! + ";"
}

Then, to append the text rather than replace it, it's a simple change of including the old value in the new one:

textView.text = textView.text + resultString + "= " + resultLabel.text! + ";"

Or, using the += operator (x += y is short for x = x + y):

textView.text += resultString + "= " + resultLabel.text! + ";"

Upvotes: 1

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