Kingfisher download image and caching in memory. can be show progress bar downloading

loadimage_kingfisher.swift

// https://github.com/onevcat/Kingfisher/wiki/Installation-Guide
// https://github.com/onevcat/Kingfisher/wiki/Cheat-Sheet

import UIKit
import Kingfisher

class example {
  func viewDidLoad {
    // Apply KingFisher
        let resource = ImageResource(downloadURL: imgUrl!)
        let placeholder = UIImage(named: "non-avatar")
        let processor = RoundCornerImageProcessor(cornerRadius: 20)
        cell.avatar.kf.indicatorType = .activity
        cell.avatar.kf.setImage(with: resource, placeholder: placeholder, options: [.processor(processor)], progressBlock: { receivedSize, totalSize in
                                    let percentage = (Float(receivedSize) / Float(totalSize)) * 100.0
                                    print("downloading progress: \(percentage)%")
        }) { (result) in
            self.handle(result)
        }
  }
  
  func handle(_ result: Result<RetrieveImageResult, KingfisherError>) {
        switch result {
        case .success(let retrieveImageResult):
            print("sucess")
            let image = retrieveImageResult.image
            let cacheType = retrieveImageResult.cacheType
            let source = retrieveImageResult.source
            let originalSource = retrieveImageResult.originalSource
            let message = """
                Image Size:
                \(image.size)

                Cache:
                \(cacheType)

                Source:
                \(source)

                Original source:
                \(originalSource)
            """
            print(message)
        case.failure(let kingfisherError):
            print(kingfisherError)
        }
    }
}

ouput.text

sucess
    Image Size:
    (460.0, 460.0)

    Cache:
    disk

    Source:
    network(Kingfisher.ImageResource(cacheKey: "https://avatars0.githubusercontent.com/u/5936?v=4", downloadURL: https://avatars0.githubusercontent.com/u/5936?v=4))

    Original source:
    network(Kingfisher.ImageResource(cacheKey: "https://avatars0.githubusercontent.com/u/5936?v=4", downloadURL: https://avatars0.githubusercontent.com/u/5936?v=4))