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| 1 | +// |
| 2 | +// File.swift |
| 3 | +// |
| 4 | +// |
| 5 | +// Created by Burak Uzunboy on 25.08.20. |
| 6 | +// |
| 7 | + |
| 8 | +#if !os(macOS) && !os(watchOS) |
| 9 | +import UIKit |
| 10 | + |
| 11 | +/** |
| 12 | + Shows Loading Indicator View on top of the root view controller when needed. |
| 13 | + */ |
| 14 | +open class LoadingIndicator { |
| 15 | + |
| 16 | + /// Tint Color that will be applied to the activity indicator. |
| 17 | + public static var tintColor: UIColor = .red { |
| 18 | + didSet { |
| 19 | + LoadingIndicator.shared.activityIndicator.color = LoadingIndicator.tintColor |
| 20 | + }} |
| 21 | + |
| 22 | + /// Background color of the container view. |
| 23 | + public static var backgroundColor: UIColor = UIColor.gray.withAlphaComponent(0.5) { |
| 24 | + didSet { |
| 25 | + LoadingIndicator.shared.activityContainer.backgroundColor = LoadingIndicator.tintColor |
| 26 | + }} |
| 27 | + |
| 28 | + /// Singleton instance. |
| 29 | + private static let shared = LoadingIndicator() |
| 30 | + /// Activity indicator view. |
| 31 | + private var activityIndicator: UIActivityIndicatorView |
| 32 | + /// Container view of the activity indicator. |
| 33 | + private var activityContainer: UIView |
| 34 | + |
| 35 | + /// Private default initializer. |
| 36 | + private init() { |
| 37 | + self.activityContainer = UIView(frame: CGRect(x: 0, y: 0, width: 80, height: 80)) |
| 38 | + self.activityContainer.backgroundColor = LoadingIndicator.backgroundColor |
| 39 | + self.activityContainer.cornerRadius = 16 |
| 40 | + |
| 41 | + self.activityIndicator = UIActivityIndicatorView(style: .whiteLarge) |
| 42 | + self.activityIndicator.frame = CGRect(x: 0, y: 0, width: 60, height: 60) |
| 43 | + self.activityIndicator.color = LoadingIndicator.tintColor |
| 44 | + self.activityIndicator.autoresizingMask = [.flexibleBottomMargin, .flexibleTopMargin, .flexibleLeftMargin, .flexibleRightMargin] |
| 45 | + self.activityIndicator.alpha = 1.0 |
| 46 | + self.activityIndicator.hidesWhenStopped = false |
| 47 | + self.activityIndicator.startAnimating() |
| 48 | + |
| 49 | + self.activityContainer.addSubview(self.activityIndicator) |
| 50 | + self.activityContainer.bringSubviewToFront(self.activityIndicator) |
| 51 | + self.activityIndicator.center = self.activityContainer.center |
| 52 | + } |
| 53 | + |
| 54 | + /// Starts to show the loading indicator in top view controller. |
| 55 | + public class func show() { |
| 56 | + guard let topVC = UIApplication.topViewController() else { return } |
| 57 | + |
| 58 | + let instance = LoadingIndicator.shared |
| 59 | + instance.activityContainer.removeFromSuperview() |
| 60 | + |
| 61 | + instance.activityContainer.alpha = 0.0 |
| 62 | + |
| 63 | + topVC.view.addSubview(instance.activityContainer) |
| 64 | + topVC.view.bringSubviewToFront(instance.activityContainer) |
| 65 | + |
| 66 | + instance.activityContainer.center = topVC.view.center |
| 67 | + UIView.animate(withDuration: 0.3) { |
| 68 | + instance.activityContainer.alpha = 1.0 |
| 69 | + } |
| 70 | + } |
| 71 | + |
| 72 | + /// Stops and hides the loading indicator from the view even view is changed. |
| 73 | + public class func stop(animated: Bool = true) { |
| 74 | + let instance = LoadingIndicator.shared |
| 75 | + |
| 76 | + if animated { |
| 77 | + UIView.animate(withDuration: 0.3, animations: { |
| 78 | + instance.activityContainer.alpha = 0.0 |
| 79 | + }) { (_) in |
| 80 | + instance.activityContainer.removeFromSuperview() |
| 81 | + } |
| 82 | + } else { |
| 83 | + instance.activityContainer.removeFromSuperview() |
| 84 | + } |
| 85 | + } |
| 86 | + |
| 87 | +} |
| 88 | + |
| 89 | +#endif |
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