tencent cloud

QCloudCOSXMLDownloadObjectRequest * request = [QCloudCOSXMLDownloadObjectRequest new];

// Bucket name in the format of BucketName-Appid, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
request.bucket = @"examplebucket-1250000000";

// Object key, i.e. the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"
request.object = @"exampleobject";

// Set the download URL. Once set, the file will be downloaded to the specified path
request.downloadingURL = [NSURL fileURLWithPath:@"Local File Path"];

// The size of the part of the file that has already been downloaded. Do not set this value for a new download operation
request.localCacheDownloadOffset = 100;

// Monitor the download result
[request setFinishBlock:^(id outputObject, NSError *error) {
    // `outputObject` contains all the HTTP response headers
    NSDictionary* info = (NSDictionary *) outputObject;
}];

// Monitor the download progress
[request setDownProcessBlock:^(int64_t bytesDownload,
                               int64_t totalBytesDownload,
                               int64_t totalBytesExpectedToDownload) {

    // bytesDownload                   Number of new bytes downloaded
    // totalBytesDownload              Total number of bytes received in the download
    // totalBytesExpectedToDownload    Target number of bytes expected to be downloaded
}];

[[QCloudCOSTransferMangerService defaultCOSTransferManager] DownloadObject:request];

let request : QCloudCOSXMLDownloadObjectRequest = QCloudCOSXMLDownloadObjectRequest();

// Bucket name in the format of BucketName-Appid, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
request.bucket = "examplebucket-1250000000";

// Object key, i.e. the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"
request.object = "exampleobject";

// Set the download URL. Once set, the file will be downloaded to the specified path
request.downloadingURL = NSURL.fileURL(withPath: "Local File Path") as URL?;

// The size of the part of the file that has already been downloaded. Do not set this value for a new download operation
request.localCacheDownloadOffset = 100;

// Monitor the download progress
request.sendProcessBlock = { (bytesDownload, totalBytesDownload,
    totalBytesExpectedToDownload) in

    // bytesDownload                   Number of new bytes downloaded
    // totalBytesDownload              Total number of bytes received in the download
    // totalBytesExpectedToDownload    Target number of bytes expected to be downloaded
}

// Monitor the download result
request.finishBlock = { (result, error) in
    if let result = result {
        // "result" contains response headers.
    } else {
        print(error!);
    }
}

QCloudCOSTransferMangerService.defaultCOSTransferManager().downloadObject(request);