This topic describes how to perform simple download.

You can download an object to a local file or as NSData:

OSSGetObjectRequest * request = [OSSGetObjectRequest new];

// Configure required fields. 
request.bucketName = @"<bucketName>";
request.objectKey = @"<objectKey>";

// Configure optional fields. 
request.downloadProgress = ^(int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite) {
    // Specify the number of bytes that are being downloaded, the number of bytes that are downloaded, and the total number of bytes that you want to download. 
    NSLog(@"%lld, %lld, %lld", bytesWritten, totalBytesWritten, totalBytesExpectedToWrite);
// request.range = [[OSSRange alloc] initWithStart:0 withEnd:99]; // bytes=0-99. Specify that the download range is from byte 0 to byte 99. 
// request.downloadToFileURL = [NSURL fileURLWithPath:@"<filepath>"]; // If you need to directly download the object to a file, specify the path of the file. 

OSSTask * getTask = [client getObject:request];

[getTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        NSLog(@"download object success!");
        OSSGetObjectResult * getResult = task.result;
        NSLog(@"download result: %@", getResult.downloadedData);
    } else {
        NSLog(@"download object failed, error: %@" ,task.error);
    return nil;

// [getTask waitUntilFinished];

// [request cancel];