如何更改UIPickerView和UIDatePicker的字体颜色？

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    let pickerView = UIPickerView()
    let datePicker = UIDatePicker()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置UIPickerView
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 设置UIDatePicker
        datePicker.datePickerMode = .date
        datePicker.addTarget(self, action: #selector(datePickerValueChanged), for: .valueChanged)
        
        // 设置字体颜色
        let textColor = UIColor.red
        
        // 设置UIPickerView的字体颜色
        let pickerViewComponentsCount = 1 // UIPickerView的列数
        let pickerViewRowsCount = 5 // UIPickerView的行数
        
        for component in 0..<pickerViewComponentsCount {
            for row in 0..<pickerViewRowsCount {
                let attributedString = NSAttributedString(string: "Row \(row)", attributes: [NSAttributedString.Key.foregroundColor: textColor])
                pickerView.delegate?.pickerView?(pickerView, attributedTitleForRow: row, forComponent: component)
            }
        }
        
        // 设置UIDatePicker的字体颜色
        if let datePickerView = datePicker.subviews.first(where: { $0 is UILabel }) as? UILabel {
            datePickerView.textColor = textColor
        }
    }
    
    // UIPickerView的数据源方法
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return 5
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return "Row \(row)"
    }
    
    // UIDatePicker值改变的处理方法
    @objc func datePickerValueChanged() {
        let selectedDate = datePicker.date
        // 处理选中的日期
    }
}