UITextField 中插入符号/光标的奇怪行为

Question

(Xcode10.1 ,Swift, iOS 11&12)
问题：如何增加 UITextField 中插入符号/光标的高度

到目前为止我所做的尝试：
我已经这样做了，问题解决了。

class BPTextField: UITextField {
    override func caretRect(for position: UITextPosition) -> CGRect {
        //CGRect rect = [super caretRectForPosition:position];
        var rect = super.caretRect(for: position)
        let h = self.frame.height - 5
        let y_ = (self.frame.height - h)/2
        rect.origin.y = y_
        rect.size.height = h;
        return rect;
    }
}

但是，当我更改键盘语言（从英文-印度到日文-假名）并键入单个字符时，插入符号/光标在 TextField 中移动到上方。

请帮帮我

我浏览了这些链接，
How to make the height of the cursor same with the height of text in UITextField?
UITextView lineSpacing make cursor height not same

编辑 我正在使用YYText 库，我将这个BPTextField 插入YYLabel 作为NSAttributedStringAttachment

这里是 NSAttributedString，

let main = NSMutableAttributedString(string: text_)
        main.yy_color = .darkGray
        main.yy_font = questionFont
        main.yy_lineSpacing = 5.0
        main.yy_lineBreakMode = .byWordWrapping

//附件

let attachment = NSMutableAttributedString.yy_attachmentString(withContent: self.tf, contentMode: UIView.ContentMode.center, attachmentSize: self.tf.frame.size, alignTo: questionFont, alignment: YYTextVerticalAlignment.bottom)
        attachment.yy_baselineOffset = -5.0
        root.append(attachment)

//BPTextField

self.tf = BPTextField(frame: CGRect(origin: CGPoint.init(x: 0, y: 13), size: CGSize(width: tfWidth.width + 7.5, height: tfWidth.height + 13.0)))
        self.tf.borderStyle = UITextField.BorderStyle.none
        self.tf.tag = 0
        self.tf.font = questionFont
        self.tf.autocorrectionType = UITextAutocorrectionType.no
        self.tf.textColor = .darkGray
        self.tf.setRoundedCorners(corners: UIRectCorner.allCorners, withRadius: 4.0)
//        self.tf.setLeftPaddingPoints(5.0)
//        self.tf.setRightPaddingPoints(0.0)
        self.tf.backgroundColor = #colorLiteral(red: 0.9058823529, green: 0.9529411765, blue: 1, alpha: 1)
        self.tf.tintColor = #colorLiteral(red: 0.2196078431, green: 0.6156862745, blue: 1, alpha: 1)
        self.tf.returnKeyType = .done
        self.tf.delegate = self

Answer 1

你可以计算origin y如下，

override func caretRect(for position: UITextPosition) -> CGRect {
    var rect = super.caretRect(for: position)
    let size = CGSize(width: rect.size.width, height: self.frame.height - 5)
    // Calculating center y
    let y = rect.origin.y - (size.height - rect.size.height)/2
    rect = CGRect(origin: CGPoint(x: rect.origin.x, y: y), size: size)
    return rect
}