Step : 1 Create a swift class that can be used as reusable

[java]

import UIKit

class ProgressHUD: UIVisualEffectView {

var text: String? {
didSet {
label.text = text
}
}

let activityIndictor: UIActivityIndicatorView = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.gray)
let label: UILabel = UILabel()
let blurEffect = UIBlurEffect(style: .light)
let vibrancyView: UIVisualEffectView

init(text: String) {
self.text = text
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
super.init(effect: blurEffect)
self.setup()
}

required init?(coder aDecoder: NSCoder) {
self.text = ""
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
super.init(coder: aDecoder)
self.setup()
}

func setup() {
contentView.addSubview(vibrancyView)
contentView.addSubview(activityIndictor)
contentView.addSubview(label)
activityIndictor.startAnimating()
}

override func didMoveToSuperview() {
super.didMoveToSuperview()

if let superview = self.superview {

let width = superview.frame.size.width / 2.3
let height: CGFloat = 50.0
self.frame = CGRect(x: superview.frame.size.width / 2 – width / 2,
y: superview.frame.height / 2 – height / 2,
width: width,
height: height)
vibrancyView.frame = self.bounds

let activityIndicatorSize: CGFloat = 40
activityIndictor.frame = CGRect(x: 5,
y: height / 2 – activityIndicatorSize / 2,
width: activityIndicatorSize,
height: activityIndicatorSize)

layer.cornerRadius = 8.0
layer.masksToBounds = true
label.text = text
label.textAlignment = NSTextAlignment.center
label.frame = CGRect(x: activityIndicatorSize + 5,
y: 0,
width: width – activityIndicatorSize – 15,
height: height)
label.textColor = UIColor.gray
label.font = UIFont.boldSystemFont(ofSize: 16)
}
}

func show() {
self.isHidden = false
}

func hide() {
self.isHidden = true
}
}

[/java]

Step 2 : Now call the class and method from Controller Class .

– show the progress dialog

[java]
let progressHUD = ProgressHUD(text: "Please wait")
self.view.addSubview(progressHUD)
progressHUD.show()
[/java]

– hide the progress dialog

[java]
progressHUD.show()
[/java]