在AWS S3上停止/取消上传

Question

我正在使用AWSLocal内容上传方法上传文件.我需要取消从其他屏幕上传.

这是上传功能:

private func uploadLocalContent(localContent: AWSLocalContent) {
    localContent.uploadWithPinOnCompletion(false, progressBlock: {[weak self](content: AWSLocalContent?, progress: NSProgress?) -> Void in
        guard let strongSelf = self else { return }
        dispatch_async(dispatch_get_main_queue()) {
            // Update the upload UI if it is a new upload and the table is not yet updated
            if(strongSelf.tableView.numberOfRowsInSection(0) == 0 || strongSelf.tableView.numberOfRowsInSection(0) < strongSelf.manager.uploadingContents.count) {
                strongSelf.updateUploadUI()
            } else {

                for uploadContent in strongSelf.manager.uploadingContents {
                    if uploadContent.key == content?.key {
                        let index = strongSelf.manager.uploadingContents.indexOf(uploadContent)!
                        let indexPath = NSIndexPath(forRow: index, inSection: 0)
                        strongSelf.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .None)
                    }
                }
            }
        }
        }, completionHandler: {[weak self](content: AWSContent?, error: NSError?) -> Void in
            guard let strongSelf = self else { return }
            strongSelf.updateUploadUI()
            if let error = error {
                print("Failed to upload an object. \(error)")
                strongSelf.showSimpleAlertWithTitle("Error", message: "Failed to upload an object.", cancelButtonTitle: "OK")
            } else {
                strongSelf.refreshContents()
            }
        })
    updateUploadUI()
}

Answer 1

不幸的是，当调用时无法取消上传， AWSLocalContent因为无法访问AWTask.

查看AWSS3TransferManager（http://docs.aws.amazon.com/AWSiOSSDK/latest/Classes/AWSS3TransferManager.html#//api/name/upload :) 为每个操作创建一个AWTask，它可以上传或下载，可以被取消/暂停/恢复。另外，您还可以获得方便的方法AWSS3TransferManager，可以立即取消/暂停/恢复所有任务。

您必须创建上传AWTask，将其保存在可以从其他屏幕访问的位置，然后您才能取消它。