ios - 如何使用 Swift 创建自定义类加载 View

Question

我正在通过自定义类加载 View 实现加载概念。我需要通过使用简单的 self.show() 来使用这个自定义类和 self.dismiss功能。在这里，我通过使用 UIActivityController 实现了这个概念。在 UIAlertView 内但我需要使用自定义类来做到这一点。

下面是我使用 UIActivityController 实现的代码在 UIAlertView 内

func loadinHubShow() {
                let alert = UIAlertController(title: nil, message: "Please wait...", preferredStyle: .alert)
                let loadingIndicator = UIActivityIndicatorView(frame: CGRect(x: 10, y: 5, width: 50, height: 50))
                loadingIndicator.hidesWhenStopped = true
                loadingIndicator.style = UIActivityIndicatorView.Style.gray
                loadingIndicator.startAnimating();
                alert.view.addSubview(loadingIndicator)
                present(alert, animated: true, completion: nil)
    }

func loadinHubDismiss() {
     dismiss(animated: false, completion: nil)
}

如何将其更改为自定义类 loading view .我不想使用 UIActivityController在 UIAlertView 内, 或者需要创建相同的外观和感觉 UI design通过 UIView .

Answer 1

import Foundation
import UIKit

public class Indicator {

    public static let sharedInstance = Indicator()
    var blurImg = UIImageView()
    var indicator = UIActivityIndicatorView()

    private init()
    {
        blurImg.frame = UIScreen.main.bounds
        blurImg.backgroundColor = UIColor.black
        blurImg.isUserInteractionEnabled = true
        blurImg.alpha = 0.5
        indicator.style = .whiteLarge
        indicator.center = blurImg.center
        indicator.startAnimating()
        indicator.color = .red
    }

    func showIndicator(){
        DispatchQueue.main.async( execute: {

            UIApplication.shared.keyWindow?.addSubview(self.blurImg)
            UIApplication.shared.keyWindow?.addSubview(self.indicator)
        })
    }
    func hideIndicator(){

        DispatchQueue.main.async( execute:
            {
                self.blurImg.removeFromSuperview()
                self.indicator.removeFromSuperview()
        })
    }
}