iOS 应用程序的 android.widget.Toast 等效项是什么

Swift
func showToast(message: String, duration: Double) {
    let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
    alert.view.alpha = 0.6
    alert.view.layer.cornerRadius = 15
    
    present(alert, animated: true, completion: nil)
    
    let timer = Timer(timeInterval: duration, target: self, selector: #selector(dismissToast), userInfo: alert, repeats: false)
    RunLoop.mAIn.add(timer, forMode: .common)
}
@objc func dismissToast(timer: Timer) {
    if let alert = timer.userInfo as? UIAlertController {
        alert.dismiss(animated: true, completion: nil)
    }
}

Swift
showToast(message: "Hello, IOS!", duration: 2.0)