Object Storage Service:iOS progress bar

Usage notes

• Before you run the sample code in this topic, you must create an OSSClient instance by using methods such as using a custom domain name or Security Token Service (STS). For more information, see Initialization.

  Note

  The region of the bucket is determined by the region of the endpoint specified for initialization.

• To download an object, you must have the ossGetObject permission. For more information, see Attach a custom policy to a RAM user.

Examples

The following sample code provides an example on how to display the progress of an object named exampleobject.txt that is being downloaded from a bucket named examplebucket:

OSSGetObjectRequest * request = [OSSGetObjectRequest new];
// Specify the name of the bucket. Example: examplebucket. 
request.bucketName = @"examplebucket";
// Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. 
request.objectKey = @"exampledir/exampleobject.txt";
// Configure the progress callback function to display the progress bar. 
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);
};

OSSTask * getTask = [client getObject:request];
[getTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        NSLog(@"download object success!");
    } else {
        NSLog(@"download object failed, error: %@" ,task.error);
    }
    return nil;
}];
// Implement synchronous blocking to wait for the task to complete. 
// [putTask waitUntilFinished]; 

References

For more information about how to initialize an OSSClient instance, see Initialization.