Overlays

Complete API reference

A library for displaying an empty list message or a loading indicator. You can show any custom view atop of a view controller content.

Requirements

• iOS 9+
• Swift 5
• XCode 10.3+

Installation

Overlays is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'Overlays'

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Prepare the overlay view

Create a custom class for the overlay view. Implement the OverlayView protocol.

import Overlays

class CustomOverlay: UIView, OverlayView {
}

Creating overlay views with template

You can use OverlayTemplate class to make overlays.

import Overlays
...
let overlay = OverlayTemplate(alignment: .center)
overlay.addImage(named: "Empty")
overlay.addSeparator(30)
overlay.addHeadline("No results :(")
overlay.addSeparator(8)
overlay.addSubhead("Please try again later.")
overlay.addSeparator(20)
overlay.addButton("Retry", listener: { [unowned self] in self.reload() })
showOverlay(overlay)
...

You can integrate custom progress indicators as well.

import Overlays
import MBProgressHUD
...
let hudContainer = UIView()
MBProgressHUD.showAdded(to: hudContainer, animated: false)

let overlay = OverlayTemplate(alignment: .center)
overlay.addView(hudContainer)
showOverlay(overlay)
...

Displaying inside a View Controller

import Overlays

class CustomOverlayViewController: UIViewController {
    @IBOutlet var overlay: CustomOverlay!

    func show() {
        showOverlay(overlay)
    }

    func hide() {
        hideOverlay()
    }
...
}

Displaying atop of a View

import Overlays
...
@IBOutlet var overlay: CustomOverlay!
@IBOutlet weak var containerView: UIView!

func show() {
    containerView.showOverlay(overlay)
}

func hide() {
    containerView.hideOverlay()
}
...

Displaying above the keyboard

import Overlays

class CustomOverlayViewController: UIViewController {
    @IBOutlet var overlay: CustomOverlay!

    private lazy var keyboardAwareOverlays = KeyboardAwareOverlays(controller: self)

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        keyboardAwareOverlays.startListeningKeyboardEvents()
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        keyboardAwareOverlays.stopListeningKeyboardEvents()
    }

    func show() {
        keyboardAwareOverlays.showOverlay(overlay)
    }

    func hide() {
        keyboardAwareOverlays.hideOverlay()
    }
...
}

Author

Evgeniy Safronov, [email protected], https://ios-dev.ru

License

Overlays is available under the MIT license. See the LICENSE file for more info. The MBProgressHUD library, used in the example project, is available under the MIT license.