How to align text inside textView vertically?

2019-03-26 01:24发布

I want to align vertically the text inside my UITextView (so it will be in the middle of it). How can i achieve that? I looked up and could not find any answer that could help me.

Thanks in advance.

2条回答
太酷不给撩
2楼-- · 2019-03-26 02:16

If you want to do this using the storyboard, you could add a view and inside of your textView. Then, set the constraints that you used for the textView to the new view. Finally, add the following constraints to your text view:

  • (right and left) O and point to the new view
  • using the alignment constraints, add a vertically constraint.

    enter image description here

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女痞
3楼-- · 2019-03-26 02:19

Link your textview to your viewcontroller and name it as you want (let's say textView).

In viewDidLayoutSubviews function put this line:

textView.centerVertically()

Then under the last curly bracket of your class put this extension:

  extension UITextView {

    func centerVertically() {
        let fittingSize = CGSize(width: bounds.width, height: CGFloat.greatestFiniteMagnitude)
        let size = sizeThatFits(fittingSize)
        let topOffset = (bounds.size.height - size.height * zoomScale) / 2
        let positiveTopOffset = max(1, topOffset)
        contentOffset.y = -positiveTopOffset
    }

}

To use this function for swift2 just change CGFloat.greatestFiniteMagnitude to CGFloat.max

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