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Dead Simple HUD implementation in swift with a title and an Acitivity indicator
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| import UIKit | |
| class HUD: UIView { | |
| private lazy var backView: UIView = UIView(frame: bounds) | |
| private let activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView(style: .whiteLarge) | |
| private lazy var titleLabel: UILabel = { | |
| let title = UILabel() | |
| title.font = UIFont.boldSystemFont(ofSize: 16) | |
| title.textColor = headerColor | |
| title.textAlignment = .center | |
| return title | |
| }() | |
| private var headerColor = UIColor.white | |
| private var backColor = UIColor.black | |
| private var loaderColor = UIColor.white | |
| // MARK: Public Methods | |
| public static func showInView(_ view: UIView, title: String? = nil) { | |
| hideInView(view) // prevents adding more than one | |
| guard let window = view.window else { | |
| return | |
| } | |
| DispatchQueue.main.async { | |
| let hud = HUD() | |
| hud.frame = UIScreen.main.bounds | |
| hud.setupOverlay() | |
| hud.setupActivityIndicator() | |
| if let title = title { | |
| hud.setupTitle(text: title) | |
| } | |
| window.addSubview(hud) | |
| } | |
| } | |
| // Removes all HUDs from the window | |
| public static func hideInView(_ view: UIView) { | |
| guard let window = view.window else { | |
| return | |
| } | |
| DispatchQueue.main.async { | |
| window.subviews | |
| .filter({ $0 is HUD }) | |
| .forEach({ $0.removeFromSuperview() }) | |
| } | |
| } | |
| // MARK: - Set view properties | |
| private func setupOverlay() { | |
| if let old = backView.viewWithTag(1001) as UIView? { | |
| old.removeFromSuperview() | |
| } | |
| let translucentView = UIView(frame: backView.bounds) | |
| translucentView.backgroundColor = backColor | |
| translucentView.alpha = 0.75 | |
| translucentView.tag = 1001 | |
| backView.addSubview(translucentView) | |
| addSubview(backView) | |
| } | |
| private func setupActivityIndicator() { | |
| activityIndicator.style = .whiteLarge | |
| activityIndicator.color = loaderColor | |
| activityIndicator.backgroundColor = UIColor.clear | |
| activityIndicator.startAnimating() | |
| activityIndicator.center = center | |
| addSubview(activityIndicator) | |
| } | |
| private func setupTitle(text: String) { | |
| titleLabel.text = text | |
| titleLabel.sizeToFit() | |
| titleLabel.adjustsFontSizeToFitWidth = true | |
| let xPos = bounds.midX - titleLabel.bounds.midX | |
| let yPos = activityIndicator.frame.maxY + 5 | |
| titleLabel.frame.origin = CGPoint(x: xPos, y: yPos) | |
| addSubview(titleLabel) | |
| } | |
| } |
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