如何使用自定义警报弹出视图切换警报弹出视图？

Question

我正在尝试创建自定义 AlertView，一旦应用打开，它就会在主屏幕上弹出。在故事板上使用自定义 XIB 或视图控制器。我已经阅读了 UIKit 以找到一种将基础的警报视图切换到我想要呈现但仍然没有骰子的自定义视图的方法。

这是我要替换基本 AlertView Custom Alert 的自定义 xib

我的代码目前在主屏幕打开时显示 AlertView，我只是不知道如何将基本警报视图切换到自定义视图

---

import UIKit

class HomeViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
}

override func viewDidAppear(_ animated: Bool) {
    createAlert(title: "Are you 21 years of Age or Over?", message: "")
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}
func createAlert (title: String, message: String) {
    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.actionSheet)

    // CREATING ON BUTTON
    alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: { (action) in
        alert.dismiss(animated: true, completion: nil)
        print("Yes")
    }))

    alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: { (action) in
        alert.dismiss(animated: true, completion: nil)
        print("No")
    }))

    self.present(alert, animated: true, completion: nil)
}

}

Answer 1

您可以将视图控制器视图添加到 HomeViewController 并像模态当前视图控制器一样为新视图设置动画。

class HomeViewController: UIViewController {

    var alert: CustomAlertViewController!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    override func viewDidAppear(_ animated: Bool) {
        //Make below code as a seperate method and call from as per your conveience

        alert = CustomAlertViewController(nibName: "CustomAlertViewController", bundle: Bundle.main)
        alert.delegate = self
        //animate view like presenting modal view controller
        var rect = alert.view.frame
        rect.origin.y = rect.height
        alert.view.frame = rect

        self.view.addSubview(alert.view)

        UIView.animate(withDuration: TimeInterval(0.5)) {
            rect.origin.y = 0
            self.alert.view.frame = rect
        }
    }


}

extension HomeViewController: CustomAlertProtocol {
    func dismissAlert(isYes: Bool) {
        //capture yes no answer from isYes variable

        self.alert.view.removeFromSuperview()
    }


}

根据需要在 nib 文件中设计您的 CustomAlertViewController 视图。

protocol CustomAlertProtocol: class {
    func dismissAlert(isYes: Bool)
}

class CustomAlertViewController: UIViewController {

    weak var delegate: CustomAlertProtocol?
    override func viewDidLoad() {
        super.viewDidLoad()


        self.view.backgroundColor = UIColor.clear
    }

    @IBAction func yes(id: Any) {
        delegate?.dismissAlert(isYes: true)
    }

    @IBAction func no(id: Any) {
        delegate?.dismissAlert(isYes: false)
    }


}