🖼 KFImageViewer

Customizable Kingfisher dependent Swift image slideshow with download progress, circular scrolling, timer and full screen viewer

📱 Example

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

🔧 Installation

CocoaPods

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

pod 'KFImageViewer', '~> 1.0.0'

Manually

Alternatively can also grab the whole KFImageViewer directory and copy it to your project.

🔨 How to use

Add KFImageViewer view to your view hiearchy either in Interface Builder or in code.

Loading images

Set images by using setImageInputs method on KFImageViewer instance with an array of InputSources. You can also create your own input source by implementing InputSource protocol.

Library	InputSource name	Pod
Kingfisher	KingfisherSource	pod "KFImageViewer/Kingfisher"

slideshow.setImageInputs([
  KingfisherSource(urlString: "https://images.unsplash.com/photo-1432679963831-2dab49187847?w=1080"),
])

Configuration

Behaviour is configurable by those properties:

• slideshowInterval - slideshow interval in seconds (default 0 – disabled)
• zoomEnabled - enables zooming (default false)
• circular - enables circular scrolling (default true)
• activityIndicator – allows to set custom activity indicator, see Activity indicator section
• pageIndicator – allows to set custom page indicator, see Page indicator section; assign nil to hide page indicator
• pageIndicatorPosition - configures position of the page indicator
• contentScaleMode - configures the scaling (default ScaleAspectFit)
• draggingEnabled - enables dragging (default true)
• currentPageChanged - closure called on page change
• willBeginDragging - closure called on scrollViewWillBeginDragging
• didEndDecelerating - closure called on scrollViewDidEndDecelerating
• preload - image preloading configuration (default all preloading, also fixed)

Page Indicator

Page indicator can be customized using the pageIndicator property on KFImageViewer. By defualt, a plain UIPageControl is used. If needed, page control can be customized:

let pageIndicator = UIPageControl()
pageIndicator.currentPageIndicatorTintColor = UIColor.lightGray
pageIndicator.pageIndicatorTintColor = UIColor.black
slideshow.pageIndicator = pageIndicator

Also, a simple label page indicator that shows pages in style "5/21" (fifth page from twenty one) is provided:

slideshow.pageIndicator = LabelPageIndicator()

You can also use your own page indicator by adopting the PageIndicatorView protocol.

Position of the page indicator can be configured by assigning a PageIndicatorPosition value to the pageIndicatorPosition property on KFImageViewer. You may specify the horizontal and vertical positioning separately.

Horizontal positioning options are: .left(padding: Int), .center, .right(padding: Int)

Vertical positioning options are: .top, .bottom, .under, customTop(padding: Int), customBottom(padding: Int), customUnder(padding: Int)

Example:

slideshow.pageIndicatorPosition = PageIndicatorPosition(horizontal: .left(padding: 20), vertical: .bottom)

Activity Indicator

By default activity indicator is not shown, but you can enable it by setting DefaultActivityIndicator instance to KFImageViewer :

slideshow.activityIndicator = DefaultActivityIndicator()

You can customize style and color of the indicator:

slideshow.activityIndicator = DefaultActivityIndicator(style: .white, color: nil)

There's also an option to use your own activity indicator. You just need to implement ActivityIndicatorView and ActivityIndicatorFactory protocols. See ActivityIndicator.swift for more information.

Full Screen view

There is also a possibility to open full-screen image view using attached FullScreenSlideshowViewController. The simplest way is to call:

override func viewDidLoad() {
  let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.didTap))
  slideshow.addGestureRecognizer(gestureRecognizer)
}

func didTap() {
  slideshow.presentFullScreenController(from: self)
}

FullScreenSlideshowViewController can also be instantiated and configured manually if more advanced behavior is needed.

👤 Author

Faisal Azeez faisalazeez7@gmail.com

📄 License

KFImageViewer is available under the MIT license. See the LICENSE file for more info.