ios - 如何将警报弹出 View 与自定义警报弹出 View 切换？

Question

我正在尝试创建自定义 AlertView，一旦应用程序打开，它就会在主屏幕上弹出。在 Storyboard上使用自定义 XIB 或 View Controller 。我已经阅读了 UIKit，找到了一种方法将基础的警报 View 切换到我想要呈现的自定义 View ，但仍然没有骰子。

以下是我想要替换基本 AlertView 的自定义 xib Custom Alert

我的代码当前在主屏幕打开时显示AlertView，我只是不知道如何将基本警报 View 切换到自定义 View

---

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 View Controller View 添加到 HomeViewController 并为新 View 添加动画，如模态当前 View Controller 。

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 CustomAlertViewController View 。

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)
    }


}