ios - 在 iOS Swift 中不使用 AWS SDK 在 Amazon S3 存储桶中上传背景图像(后台模式)

Question

我有一个捕获图像的应用程序，触发获取文档上传策略的请求，并开始上传图像。当用户在前台时，图像会上传，但当用户在后台时，图像不会上传或上传失败。所以我想在应用程序处于后台(后台模式)时上传图像。

在后台(后台模式)上传图片的正确路径是什么？

应用程序是用 Swift 2.3 编写的

任何帮助将不胜感激

谢谢

Answer 1

使用处理后台上传的 AWSS3TransferUtility

    import AWSS3

    let transferUtility = AWSS3TransferUtility.default()
    //In order to customize the header information, we use the AWSS3TransferUtilityUploadExpression class
    let expression = AWSS3TransferUtilityUploadExpression()

    //We want our file to be publicly available by default
    expression.setValue("public-read", forRequestParameter: "x-amz-acl")

    //Copy the custom Meta information into the expression
    transferUtility.uploadFile(uploadRequest.body, bucket: uploadRequest.bucket ?? "", key: uploadRequest.key ?? "", contentType: uploadRequest.contentType ?? "", expression: expression) { (task, error) in }

不要忘记在您的应用委托(delegate)中添加以下代码

func application(_ application: UIApplication, handleEventsForBackgroundURLSession identifier: String, completionHandler: @escaping () -> Void) {
    /*
     Store the completion handler.
     */
    AWSS3TransferUtility.interceptApplication(application, handleEventsForBackgroundURLSession: identifier, completionHandler: completionHandler)
}