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

Based on "MirekE" answer here is a code that i tested now and its working:

var activityIndicator: UIActivityIndicatorView!

var viewActivityIndicator: UIView!

override func viewDidLoad()
{
    super.viewDidLoad()

    let width: CGFloat = 200.0
    let height: CGFloat = 50.0
    let x = self.view.frame.width/2.0 - width/2.0
    let y = self.view.frame.height/2.0 - height/2.0

    self.viewActivityIndicator = UIView(frame: CGRect(x: x, y: y, width: width, height: height))
    self.viewActivityIndicator.backgroundColor = UIColor(red: 255.0/255.0, green: 204.0/255.0, blue: 51.0/255.0, alpha: 0.5)
    self.viewActivityIndicator.layer.cornerRadius = 10

    self.activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
    self.activityIndicator.color = UIColor.blackColor()
    self.activityIndicator.hidesWhenStopped = false

    let titleLabel = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
    titleLabel.text = "Processing..."

    self.viewActivityIndicator.addSubview(self.activityIndicator)
    self.viewActivityIndicator.addSubview(titleLabel)

    self.view.addSubview(self.viewActivityIndicator)
}

func doSometing()
{
    self.activityIndicator.startAnimating()
    UIApplication.sharedApplication().beginIgnoringInteractionEvents()

    //do something here that will taking time

    self.activityIndicator.stopAnimating()
    UIApplication.sharedApplication().endIgnoringInteractionEvents()
    self.viewActivityIndicator.removeFromSuperview()
}

Answer 2

import UIKit

class ViewControllerUtils {

    let containerView: UIView = {

        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = UIColor(white: 0, alpha: 0.3)
        return view
    }()

    let loadingView: UIView = {

        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = UIColor(white: 0, alpha: 0.7)
        view.clipsToBounds = true
        view.layer.cornerRadius = 10
        return view
    }()

    let activityIndicatorView: UIActivityIndicatorView = {

        let aiv = UIActivityIndicatorView()
        aiv.translatesAutoresizingMaskIntoConstraints = false
        aiv.style = UIActivityIndicatorView.Style.whiteLarge
        return aiv
    }()

    let loadingLabel: UILabel = {

        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.text = "Loading..."
        label.textAlignment = .center
        label.textColor = .white
        label.font = .systemFont(ofSize: 15, weight: UIFont.Weight.medium)
        return label
    }()

    func showLoader() {

        guard let window = UIApplication.shared.keyWindow else { return }

        window.addSubview(containerView)
        containerView.addSubview(loadingView)
        loadingView.addSubview(activityIndicatorView)
        loadingView.addSubview(loadingLabel)

        containerView.leftAnchor.constraint(equalTo: window.leftAnchor).isActive = true
        containerView.rightAnchor.constraint(equalTo: window.rightAnchor).isActive = true
        containerView.topAnchor.constraint(equalTo: window.topAnchor).isActive = true
        containerView.bottomAnchor.constraint(equalTo: window.bottomAnchor).isActive = true

        loadingView.centerXAnchor.constraint(equalTo: window.centerXAnchor).isActive = true
        loadingView.centerYAnchor.constraint(equalTo: window.centerYAnchor).isActive = true
        loadingView.widthAnchor.constraint(equalToConstant: 120).isActive = true
        loadingView.heightAnchor.constraint(equalToConstant: 120).isActive = true

        activityIndicatorView.centerXAnchor.constraint(equalTo: window.centerXAnchor).isActive = true
        activityIndicatorView.centerYAnchor.constraint(equalTo: window.centerYAnchor).isActive = true
        activityIndicatorView.widthAnchor.constraint(equalToConstant: 60).isActive = true
        activityIndicatorView.heightAnchor.constraint(equalToConstant: 60).isActive = true

        loadingLabel.leftAnchor.constraint(equalTo: loadingView.leftAnchor).isActive = true
        loadingLabel.rightAnchor.constraint(equalTo: loadingView.rightAnchor).isActive = true
        loadingLabel.bottomAnchor.constraint(equalTo: loadingView.bottomAnchor).isActive = true
        loadingLabel.heightAnchor.constraint(equalToConstant: 40).isActive = true

        DispatchQueue.main.async {

            self.activityIndicatorView.startAnimating()
        }
    }

    func hideLoader() {

        DispatchQueue.main.async {

            self.activityIndicatorView.stopAnimating()
            self.activityIndicatorView.removeFromSuperview()
            self.loadingLabel.removeFromSuperview()
            self.loadingView.removeFromSuperview()
            self.containerView.removeFromSuperview()
        }
    }
}

//// In order to show the activity indicator, call the function from your view controller
// let viewControllerUtils = ViewControllerUtils()
// viewControllerUtils.showLoader()

//// In order to hide the activity indicator, call the function from your view controller
// viewControllerUtils.hideLoader()

class ViewControllerUtils2 {

    var container: UIView = UIView()
    var loadingView: UIView = UIView()
    var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    let loadingLabel = UILabel()

    func showLoader(_ uiView: UIView) {

        container.frame = uiView.frame
        container.center = uiView.center
        container.backgroundColor = UIColor(white: 0, alpha: 0.3)

        loadingView.frame = CGRect(x: 0, y: 0, width: 120, height: 120)
        loadingView.center = uiView.center
        loadingView.backgroundColor = UIColor(white: 0, alpha: 0.7)
        loadingView.clipsToBounds = true
        loadingView.layer.cornerRadius = 10

        activityIndicator.frame = CGRect(x: 0, y: 0, width: 60, height: 60)
        activityIndicator.style = UIActivityIndicatorView.Style.whiteLarge
        activityIndicator.center = CGPoint(x: loadingView.frame.size.width / 2, y: loadingView.frame.size.height / 2)

        loadingLabel.frame = CGRect(x: 0, y: 80, width: 120, height: 40)
        loadingLabel.text = "Loading..."
        loadingLabel.textAlignment = .center
        loadingLabel.textColor = .white
        loadingLabel.font = .systemFont(ofSize: 15, weight: UIFont.Weight.medium)

        uiView.addSubview(container)
        container.addSubview(loadingView)
        loadingView.addSubview(activityIndicator)
        loadingView.addSubview(loadingLabel)

        DispatchQueue.main.async {

            self.activityIndicator.startAnimating()
        }
    }

    func hideLoader() {

        DispatchQueue.main.async {

            self.activityIndicator.stopAnimating()
            self.activityIndicator.removeFromSuperview()
            self.loadingLabel.removeFromSuperview()
            self.loadingView.removeFromSuperview()
            self.container.removeFromSuperview()
        }
    }
}

Answer 3

This code work in SWIFT 2.0.

Must Declare a variable for initialize UIActivityIndicatorView

let actInd: UIActivityIndicatorView = UIActivityIndicatorView() 

After initialize put this code in your controller.

actInd.center = ImageView.center
actInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.WhiteLarge
view.addSubview(actInd)
actInd.startAnimating()

after your download process complete then hide a animation.

self.actInd.stopAnimating()

Answer 4

For Swift 3

Usage

class LoginTVC: UITableViewController {
    var loadingView : LoadingView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // CASE 1: To Show loadingView on load

        loadingView = LoadingView(uiView: view, message: "Sending you verification code")
    }

    // CASE 2: To show loadingView on click of a button

    @IBAction func showLoadingView(_ sender: UIButton) {
        if let loaderView = loadingView{ // If loadingView already exists
            if loaderView.isHidden() {
                loaderView.show()  // To show activity indicator
            }
        }
        else{
            loadingView = LoadingView(uiView: view, message: "Sending you verification code")
         }
    }
}

    // CASE 3: To hide LoadingView on click of a button

    @IBAction func hideLoadingView(_ sender: UIButton) {
        if let loaderView = loadingView{ // If loadingView already exists 
            self.loadingView.hide()   
        }
    }
}

LoadingView Class

class LoadingView {

    let uiView          :   UIView
    let message         :   String
    let messageLabel    =   UILabel()

    let loadingSV       =   UIStackView()
    let loadingView     =   UIView()
    let activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)

    init(uiView: UIView, message: String) {
        self.uiView     =   uiView
        self.message    =   message
        self.setup()
    }

    func setup(){
        let viewWidth   = uiView.bounds.width
        let viewHeight  = uiView.bounds.height

        // Configuring the message label
        messageLabel.text             = message
        messageLabel.textColor        = UIColor.darkGray
        messageLabel.textAlignment    = .center
        messageLabel.numberOfLines    = 3
        messageLabel.lineBreakMode    = .byWordWrapping

        // Creating stackView to center and align Label and Activity Indicator
        loadingSV.axis          = .vertical
        loadingSV.distribution  = .equalSpacing
        loadingSV.alignment     = .center
        loadingSV.addArrangedSubview(activityIndicator)
        loadingSV.addArrangedSubview(messageLabel)

        // Creating loadingView, this acts as a background for label and activityIndicator
        loadingView.frame           = uiView.frame
        loadingView.center          = uiView.center
        loadingView.backgroundColor = UIColor.darkGray.withAlphaComponent(0.3)
        loadingView.clipsToBounds   = true

        // Disabling auto constraints
        loadingSV.translatesAutoresizingMaskIntoConstraints = false

        // Adding subviews
        loadingView.addSubview(loadingSV)
        uiView.addSubview(loadingView)
        activityIndicator.startAnimating()

        // Views dictionary
        let views = [
            "loadingSV": loadingSV
        ]

        // Constraints for loadingSV
        uiView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-[loadingSV(300)]-|", options: [], metrics: nil, views: views))
        uiView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-\(viewHeight / 3)-[loadingSV(50)]-|", options: [], metrics: nil, views: views))
    }

    // Call this method to hide loadingView
    func show() {
        loadingView.isHidden = false
    }

    // Call this method to show loadingView
    func hide(){
        loadingView.isHidden = true
    }

    // Call this method to check if loading view already exists
    func isHidden() -> Bool{
        if loadingView.isHidden == false{
            return false
        }
        else{
            return true
        }
    }
}

Answer 5

Heres how this code looks:

Heres my drag and drop code:

var boxView = UIView()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    view.backgroundColor = UIColor.blackColor()
    addSavingPhotoView()

    //Custom button to test this app
    var button = UIButton(frame: CGRect(x: 20, y: 20, width: 20, height: 20))
    button.backgroundColor = UIColor.redColor()
    button.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)

    view.addSubview(button)
}

func addSavingPhotoView() {
    // You only need to adjust this frame to move it anywhere you want
    boxView = UIView(frame: CGRect(x: view.frame.midX - 90, y: view.frame.midY - 25, width: 180, height: 50))
    boxView.backgroundColor = UIColor.whiteColor()
    boxView.alpha = 0.8
    boxView.layer.cornerRadius = 10

    //Here the spinnier is initialized
    var activityView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.Gray)
    activityView.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
    activityView.startAnimating()

    var textLabel = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
    textLabel.textColor = UIColor.grayColor()
    textLabel.text = "Saving Photo"

    boxView.addSubview(activityView)
    boxView.addSubview(textLabel)

    view.addSubview(boxView)
}

func buttonAction(sender:UIButton!) {
    //When button is pressed it removes the boxView from screen
    boxView.removeFromSuperview()
}

Here is an open source version of this: https://github.com/goktugyil/CozyLoadingActivity

Answer 6

With auto width and theme support also detects rotate while busy (Swift 3 version)

Use it like below:

var progressView: ProgressView?
override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    self.progressView = ProgressView(message: "Work in progress!",
                                         theme: .dark,
                                         isModal: true)
}

@IBAction func onPause(_ sender: AnyObject) {
    self.progressView.show()      
}

@IBAction func onResume(_ sender: AnyObject) {
    self.progressView.hide()       
}

ProgressView.swift

import UIKit

class ProgressView: UIView {

    enum Theme {
        case light
        case dark
    }

    var theme: Theme
    var container: UIStackView
    var activityIndicator: UIActivityIndicatorView
    var label: UILabel
    var glass: UIView


    private var message: String
    private var isModal: Bool

    init(message: String, theme: theme, isModal: Bool) {
        // Init
        self.message = message
        self.theme = theme
        self.isModal = isModal

        self.container = UIStackView()
        self.activityIndicator = UIActivityIndicatorView()
        self.label = UILabel()
        self.glass = UIView()

        // Get proper width by text message
        let fontName = self.label.font.fontName
        let fontSize = self.label.font.pointSize
        if let font = UIFont(name: fontName, size: fontSize) {
            let fontAttributes = [NSFontAttributeName: font]
            let size = (message as NSString).size(attributes: fontAttributes)
            super.init(frame: CGRect(x: 0, y: 0, width: size.width + 50, height: 50))
        } else {
            super.init(frame: CGRect(x: 0, y: 0, width: 200, height: 50))
        }

        // Detect rotation
        NotificationCenter.default.addObserver(self, selector: #selector(onRotate), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)

        // Style
        self.layer.cornerRadius = 3
        if (self.theme == .dark) {
            self.backgroundColor = .darkGray
        } else {
            self.backgroundColor = .lightGray
        }

        // Label
        if self.theme == .dark {
            self.label.textColor = .white
        }else{
            self.label.textColor = .black
        }
        self.label.text = self.message
        // Container
        self.container.frame = self.frame
        self.container.spacing = 5
        self.container.layoutMargins = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
        self.container.isLayoutMarginsRelativeArrangement = true
        // Activity indicator
        if (self.theme == .dark) {
            self.activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
            self.activityIndicator.color = .white
        } else {
            self.activityIndicator = UIActivityIndicatorView(activityIndicatorStyle:.whiteLarge)
            self.activityIndicator.color = .black
        }
        self.activityIndicator.startAnimating()
        // Add them to container

        // First glass
        if let superview = UIApplication.shared.keyWindow {
            if (self.isModal) {
                // glass
                self.glass.frame = superview.frame;
                if (self.theme == .dark) {
                    self.glass.backgroundColor = UIColor.black.withAlphaComponent(0.5)
                } else {
                    self.glass.backgroundColor = UIColor.white.withAlphaComponent(0.5)
                }
                superview.addSubview(glass)
            }
        }
        // Then activity indicator and label
        container.addArrangedSubview(self.activityIndicator)
        container.addArrangedSubview(self.label)
        // Last attach it to container (StackView)
        self.addSubview(container)
        if let superview = UIApplication.shared.keyWindow {
            self.center = superview.center
            superview.addSubview(self)
        }
        //Do not show until show() is called
        self.hide()
    }

    required init(coder: NSCoder) {
        self.theme = .dark
        self.Message = "Not set!"
        self.isModal = true
        self.container = UIStackView()
        self.activityIndicator = UIActivityIndicatorView()
        self.label = UILabel()
        self.glass = UIView()
        super.init(coder: coder)!
    }

    func onRotate() {
        if let superview = self.superview {
            self.glass.frame = superview.frame
            self.center = superview.center
//            superview.addSubview(self)
        }
    }

    public func show() {
        self.glass.isHidden = false
        self.isHidden = false
    }

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