iPhone：以编程方式更改键盘语言

iPhone：以编程方式更改键盘语言

swift
import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    @IBAction func changeKeyboardLanguage(_ sender: UIButton) {
        let alertController = UIAlertController(title: "Change Keyboard Language", message: "Select a language", preferredStyle: .actionSheet)
        let englishAction = UIAlertAction(title: "English", style: .default) { (action) in
            self.changeLanguage(to: "en-US")
        }
        alertController.addAction(englishAction)
        let chineseAction = UIAlertAction(title: "Chinese", style: .default) { (action) in
            self.changeLanguage(to: "zh-Hans")
        }
        alertController.addAction(chineseAction)
        let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
        alertController.addAction(cancelAction)
        present(alertController, animated: true, completion: nil)
    }
    func changeLanguage(to languageCode: String) {
        let textInputMode = UITextInputMode(activeInputModes: [languageCode])
        UITextInputMode.setCurrent(textInputMode, animated: false)
    }
}