如何用RXSwift实现UIDatePicker

# 在你的 Podfile 中添加
pod 'RxSwift', '~> 6.0'
pod 'RxCocoa', '~> 6.0'

import UIKit
import RxSwift
import RxCocoa

class ViewController: UIViewController {

    let datePicker = UIDatePicker()
    let disposeBag = DisposeBag()

    override func viewDidLoad() {
        super.viewDidLoad()

        // 设置 UIPickerView 的模式和初始值
        datePicker.datePickerMode = .dateAndTime
        datePicker.addTarget(self, action: #selector(datePickerValueChanged(_:)), for: .valueChanged)

        // 将目标-动作转换为 RxSwift 可观察序列
        datePicker.rx.valueChanged
            .subscribe(onNext: { [weak self] date in
                print("Selected date: \(date)")
                // 在这里处理日期变化
            })
            .disposed(by: disposeBag)

        // 将 UIPickerView 添加到视图中
        view.addSubview(datePicker)
        datePicker.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            datePicker.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            datePicker.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])
    }

    @objc func datePickerValueChanged(_ sender: UIDatePicker) {
        // 这个方法会被调用，但你不需要在这里做任何事情
        // 因为你已经通过 RXSwift 监听了值的变化
    }
}

override func onDestroy() {
    super.onDestroy()
    disposeBag.dispose()
}

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let dateString = dateFormatter.string(from: date)
print("Formatted date: \(dateString)")