CODEWITHSUNDEEP
iosswiftuitextview
Kimi Chiu
Kimi Chiu

Reputation: 2173

Prevent UITextView.typingattributes applying backgroundColor on linebreaks(\n) in Swift

I'm trying to make a RichTextEditor in my app.

The users can change both foreground color and background color when they're editing.

Here's how I set typingAttributes:

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {

    self.setTypingColor(foregroundColor: self.foregroundColor, backgroundColor: self.backgroundColor)

    return true
}

But I found that if the user inputs the \n, the editor will also apply background color to the whole lines.

enter image description here

Here's what I want it to be.

enter image description here

That is, I want it to apply these colors only on the characters, not the \n, \t nor \r.

Is there a way to do it without creating an AttributedString by my self?

Upvotes: 0

Views: 202

Answers (1)

Binary Pulsar
Binary Pulsar

Reputation: 1209

Something like this might work in the simple case. 

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
    if text == "\n" { // better matching required
        self.setTypingColor(foregroundColor: .clear, backgroundColor: .clear)
    } else {
        self.setTypingColor(foregroundColor: self.foregroundColor, backgroundColor: self.backgroundColor)
    }
    return true
}

But the problem will probably persist when the user pastes a string into your text view in which case I think you may have to start handling the attributed string.

Upvotes: 1

Related Questions