How to display an activity indicator with text on iOS 8 with Swift?

Question

I wanna show, programmatically, an activity indicator with text, like the one in the Photos app (after editing and saving a picture). How can I do this?

Answer 1

For activity indicator, its better you create one custom class.

Instead of creating UIActivityIndicator in each UIViewController.Subclass UIView and use from any UIViewController.

Updated for Swift 5.0:

import UIKit
import Foundation
class ProgressIndicator: UIView {

var indicatorColor:UIColor
var loadingViewColor:UIColor
var loadingMessage:String
var messageFrame = UIView()
var activityIndicator = UIActivityIndicatorView()

init(inview:UIView,loadingViewColor:UIColor,indicatorColor:UIColor,msg:String){

    self.indicatorColor = indicatorColor
    self.loadingViewColor = loadingViewColor
    self.loadingMessage = msg
    super.init(frame: CGRect(x: inview.frame.midX - 90, y: inview.frame.midY - 250 , width: 180, height: 50))
    initalizeCustomIndicator()

}
convenience init(inview:UIView) {

    self.init(inview: inview,loadingViewColor: UIColor.brown,indicatorColor:UIColor.black, msg: "Loading..")
}
convenience init(inview:UIView,messsage:String) {

    self.init(inview: inview,loadingViewColor: UIColor.brown,indicatorColor:UIColor.black, msg: messsage)
}

required init?(coder aDecoder: NSCoder) {

    fatalError("init(coder:) has not been implemented")
}

func initalizeCustomIndicator(){

    messageFrame.frame = self.bounds
    activityIndicator = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.medium)
    activityIndicator.tintColor = indicatorColor
    activityIndicator.hidesWhenStopped = true
    activityIndicator.frame = CGRect(x: self.bounds.origin.x + 6, y: 0, width: 20, height: 50)
    print(activityIndicator.frame)
    let strLabel = UILabel(frame:CGRect(x: self.bounds.origin.x + 30, y: 0, width: self.bounds.width - (self.bounds.origin.x + 30) , height: 50))
    strLabel.text = loadingMessage
    strLabel.adjustsFontSizeToFitWidth = true
    strLabel.textColor = UIColor.white
    messageFrame.layer.cornerRadius = 15
    messageFrame.backgroundColor = loadingViewColor
    messageFrame.alpha = 0.8
    messageFrame.addSubview(activityIndicator)
    messageFrame.addSubview(strLabel)


}

func  start(){
    //check if view is already there or not..if again started
    if !self.subviews.contains(messageFrame){

        activityIndicator.startAnimating()
        self.addSubview(messageFrame)

    }
}

func stop(){

    if self.subviews.contains(messageFrame){

        activityIndicator.stopAnimating()
        messageFrame.removeFromSuperview()

    }
}
}

Put this class in your project and then call from any ViewController as

var indicator:ProgressIndicator?
override func viewDidLoad() {
    super.viewDidLoad()

    //indicator = ProgressIndicator(inview: self.view,messsage: "Hello from Nepal..")
    //self.view.addSubview(indicator!)
    //OR
    indicator = ProgressIndicator(inview:self.view,loadingViewColor: UIColor.grayColor(), indicatorColor: UIColor.blackColor(), msg: "Landing within minutes,Please hold tight..")
    self.view.addSubview(indicator!)

}

@IBAction func startBtn(sender: AnyObject) {
    indicator!.start()
}


@IBAction func stopBtn(sender: AnyObject) {
    indicator!.stop()
}