CODEWITHSUNDEEP
iosswiftuitextview
Gokulraj Rajan
Gokulraj Rajan

Reputation: 57

limit TextView to certain number of lines in swift 2

I need to restrict my textview to only 6 lines. How do I limit my textview to 6 lines? I have put some character limit of 50 characters anyways.

Upvotes: 4

Views: 5901

Answers (2)

Ben Shabat
Ben Shabat

Reputation: 387

for swift 4 this one worked for without any bugs:

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
    let existingLines = textView.text.components(separatedBy: CharacterSet.newlines)
    let newLines = text.components(separatedBy: CharacterSet.newlines)
    let linesAfterChange = existingLines.count + newLines.count - 1
    return linesAfterChange <= textView.textContainer.maximumNumberOfLines
}

and if you want to limit characters also:

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
        let existingLines = textView.text.components(separatedBy: CharacterSet.newlines)
        let newLines = text.components(separatedBy: CharacterSet.newlines)
        let linesAfterChange = existingLines.count + newLines.count - 1
        if(text == "\n") {
            return linesAfterChange <= textView.textContainer.maximumNumberOfLines
        }

        let newText = (textView.text as NSString).replacingCharacters(in: range, with: text)
        let numberOfChars = newText.count
        return numberOfChars <= 30 // 30 characters limit
    }
}

don't forget to add how many lines you want the limit to be in viewDidLoad:

txtView.textContainer.maximumNumberOfLines = 2

Upvotes: 0

Vishnu gondlekar
Vishnu gondlekar

Reputation: 3956

That is rarely simple to achieve. Try out following code

inputTextView.textContainer.maximumNumberOfLines = 6
inputTextView.textContainer.lineBreakMode = .ByWordWrapping

Upvotes: 11

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