将使用Kingfisher下载的图像保存到文档目录

import Kingfisher

let url = URL(string: "https://example.com/image.jpg")
let destination: DownloadRequest.Destination = { _, _ in
    let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
    let fileURL = documentsURL.appendingPathComponent("image.jpg")
    return (fileURL, [.removePreviousFile, .createIntermediateDirectories])
}

ImageDownloader.default.downloadImage(with: url, options: [], progressBlock: nil) { result in
    switch result {
    case .success(let value):
        print("Image downloaded successfully: \(value.image)")
        // 图像已下载成功，可以将其保存到文档目录中
        let fileURL = try! value.fileURL?.asURL()
        // 这里可以使用fileURL来处理图像，例如保存到文档目录中
    case .failure(let error):
        print("Image download failed: \(error)")
        // 图像下载失败，可以进行错误处理
    }
}

if let fileURL = fileURL {
    let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
    let destinationURL = documentsURL.appendingPathComponent("image.jpg")
    
    do {
        try FileManager.default.moveItem(at: fileURL, to: destinationURL)
        print("Image saved to document directory: \(destinationURL)")
    } catch {
        print("Failed to save image: \(error)")
    }
}