ios - 可编辑 UITextView 上的垂直对齐

Question

我想在我的 UITextView 上设置垂直对齐方式。 TextView 可编辑且滚动已禁用:

let textView = UITextView(frame: frame)
textView.backgroundColor = .clear
textView.attributedText = myAttributedString
textView.isUserInteractionEnabled = true
textView.isEditable = true
textView.allowsEditingTextAttributes = true
textView.isScrollEnabled = false
textView.textContainerInset = .zero
self.addSubview(textView)

所以，我想做这样的事情:

textView.verticalAlignment = .center

我已经尝试对 TextView 进行子类化并添加如下属性:

class MyTextView: UITextView {
    public var verticalAlignment: UIControl.ContentVerticalAlignment = .center {
        didSet {
            let topCorrection: CGFloat
            switch verticalAlignment {
            case .center:
                topCorrection = (bounds.size.height - contentSize.height * zoomScale) / 2.0
            case .bottom:
                topCorrection = (bounds.size.height - contentSize.height * zoomScale)
            case .top, .fill:
                topCorrection = 0
            @unknown default:
                topCorrection = 0
            }
            contentInset.top = max(0, topCorrection)
        }
    }
}

但它似乎不适用于将 isScrollEnabled 设置为 false。

我在互联网上找到的所有其他解决方案都不起作用，我有点绝望......你能帮助我吗？

谢谢

Answer 1

也许您打算使用 UITextField？

let field = UITextField()
field.contentVerticalAlignment = UIControlContentVerticalAlignment.center

或者将其设置为.bottom、.top等