iOS-activity-indicator.swift

import UIKit

public class ActivityIndicator {
    
    private init(){}
    
    public static let shared = ActivityIndicator()
    
    var activityLabel: UILabel!
    var activityIndicator:UIActivityIndicatorView!
    var activityView: UIVisualEffectView!
    
    func startAnimating(with title: String, in vc: UIViewController){
        
        // Acitivty Label..............
        activityLabel = UILabel(frame: CGRect(x: 50,
                                              y: 0,
                                              width: 200,
                                              height: 50))
        activityLabel.text = title
        activityLabel.textColor = UIColor.black
        activityLabel.alpha = 0.8
        
        // Activity Indicator.................
        activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .gray)
        activityIndicator.frame =  CGRect(x: 0,
                                          y: 0,
                                          width: 50,
                                          height: 50)
        activityIndicator.startAnimating()
        
        // Activity View....................
        if #available(iOS 10.0, *) {
            let effect = UIBlurEffect(style: .prominent)
            activityView = UIVisualEffectView(effect: effect)
        } else {
            activityView = UIVisualEffectView()
            activityView.backgroundColor = UIColor.darkGray
            // Fallback on earlier versions
        }
        activityView.frame =  CGRect(x: vc.view.frame.midX - activityLabel.frame.width/2,
                                     y: vc.view.frame.midY - activityLabel.frame.height/2,
                                     width: 200,
                                     height: 50)
        activityView.layer.cornerRadius = 10
        activityView.layer.masksToBounds = true
        
        // Attaching View...................
        activityView.contentView.addSubview(activityIndicator)
        activityView.contentView.addSubview(activityLabel)
        vc.view.addSubview(activityView)
    }
    
    func stopAnimating(){
        activityView.removeFromSuperview()
    }
}