将UIDatePicker选定日期文本颜色更改为深色模式(iOS 13)

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建UIDatePicker实例
        let datePicker = UIDatePicker()
        
        // 设置UIDatePicker的tintColor为深色
        datePicker.tintColor = UIColor.systemBlue
        
        // 将UIDatePicker添加到视图中
        view.addSubview(datePicker)
        
        // 设置UIDatePicker的约束
        datePicker.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            datePicker.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            datePicker.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])
    }
}