在iOS Swift中不使用AWS SDK在Amazon S3存储桶中上传的背景图像（背景模式）

Question

我有一个捕获图像/图像的应用程序，获取文档上载策略的请求被激活，并开始上传图像/图像。当用户在前台时，图像/图像上传，但是当用户在后台时，图像/图像不会上传或无法上传。所以我想在应用程序处于后台时（背景模式）上传图像/图像。

背景（背景模式）上传图像/图像的正确路径是什么？

该应用程序是用Swift 2.3编写的

任何帮助，将不胜感激

谢谢

Answer 1

使用AWSS3TransferUtility处理后台上传

    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 }

别忘了在你的app 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)
}