你能改变UITextView中的光标颜色吗？

import UIKit

class CustomTextView: UITextView {
    override func caretRect(for position: UITextPosition) -> CGRect {
        let originalRect = super.caretRect(for: position)
        return CGRect(x: originalRect.origin.x, y: originalRect.origin.y, width: 2, height: originalRect.size.height)
    }

    override func draw(_ rect: CGRect) {
        super.draw(rect)
        if let caretRect = self.caretRect(for: selectedTextRange?.start),
            let context = UIGraphicsGetCurrentContext() {
            context.setFillColor(UIColor.red.cgColor)
            context.fill(caretRect)
        }
    }
}