CQDownloader

Base on the https://github.com/wibosco/BackgroundTransfer-Example

• Downloading
• Download with progress callback
• Download finish callback
• Pause/Resume (90% done)
• With TableView Design
• More Error Checking
• Fixed for background update disable and went to the background, need to pause and allow to resume

Usages

Nee to add following code in AppDelegate.swift

func application(_ application: UIApplication, handleEventsForBackgroundURLSession identifier: String, completionHandler: @escaping () -> Void) {
    CQDownloader.shared.backgroundCompletionHandler = completionHandler
}

let downloader = CQDownloader.shared

You can pass any string data to data model. Passing Title in the following example.

self.downloader.download(remoteURL: remoteURL, filePathURL: filepath, data: ["Title": number], onProgressHandler: { (downloadItem:CQDownloadItem) in

}) { (result:DataRequestResult<URL>) in

}

Can check the example at TableViewController.swift

Known Issues

Not working for redirect download

Currently key is using download URL. When resume, we cannot get back the originalRequest. So, I use the currentRequest. If URL is redirecting, current originalRequest and currentRequest may different.

Here is how I get the requesturl from download task.

var requestURL = downloadTask.originalRequest?.url
if requestURL == nil {
    requestURL = downloadTask.currentRequest?.url
}

Logs

30 Jul 2019

• Fixed for Xcode 10.3