QCloudServiceConfiguration* configuration = [QCloudServiceConfiguration new];
QCloudCOSXMLEndPoint* endpoint = [[QCloudCOSXMLEndPoint alloc] init];

// Replace with your region. The region to which the created bucket belongs can be viewed in the console at https://console.tencentcloud.com/cos5/bucket
// For a list of all regions supported by COS, see https://www.tencentcloud.com/document/product/436/6224?from_cn_redirect=1
endpoint.regionName = @"COS_REGION";
// Use HTTPS
endpoint.useHTTPS = true;
configuration.endpoint = endpoint;

// Configure the client p12 certificate.
NSString *path = [[NSBundle mainBundle] pathForResource:@"client" ofType:@"p12"];
NSData *p12Data = [NSData dataWithContentsOfFile:path];
configuration.clientCertificateData = p12Data;
// Configure the certificate password
configuration.password = @"123456";

// Example of initializing the COS service
[QCloudCOSXMLService registerDefaultCOSXMLWithConfiguration:configuration];
[QCloudCOSTransferMangerService registerDefaultCOSTransferMangerWithConfiguration:
        configuration];

// 1. Use server-side encryption (SSE-COS) with COS-managed encryption keys to protect data
QCloudCOSXMLUploadObjectRequest *request = [QCloudCOSXMLUploadObjectRequest new];
[request setCOSServerSideEncyption];

// 2. Use server-side encryption (SSE-C) with customer-provided encryption keys to protect data
QCloudCOSXMLUploadObjectRequest *request = [QCloudCOSXMLUploadObjectRequest new];
NSString *customKey = @"123456qwertyuioplkjhgfdsazxcvbnm";
[request setCOSServerSideEncyptionWithCustomerKey:customKey];

// 3. Use server-side encryption (SSE-KMS) with KMS-managed encryption keys to protect data
QCloudCOSXMLUploadObjectRequest *request = [QCloudCOSXMLUploadObjectRequest new];
NSString *customKey = @"123456qwertyuioplkjhgfdsazxcvbnm";
NSString *arrJsonStr = @"{\\"key\\":\\"value\\"}";
[request setCOSServerSideEncyptionWithKMSCustomKey:customKey jsonStr:arrJsonStr];

QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
NSURL* url = [NSURL fileURLWithPath:@"File URL"];
// Bucket name, which consists of BucketName-Appid, can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
put.bucket = @"examplebucket-1250000000";
// Object key, which is the full path of the object on COS. If including a directory, the format should be "video/xxx/movie.mp4"
put.object = @"exampleobject";
// The content of the object to be uploaded. You can pass in a variable of type NSData* or NSURL*
put.body =  url;
// Monitor upload progress
[put setSendProcessBlock:^(int64_t bytesSent,
                           int64_t totalBytesSent,
                           int64_t totalBytesExpectedToSend) {
    //      bytesSent                 The number of bytes to be sent this time (a large file may need to be sent in multiple parts)
    //      totalBytesSent            The number of bytes sent
    //      totalBytesExpectedToSend  The total number of bytes to be sent in this upload (which is the size of a single file)
}];
// Monitor upload result
[put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the uploaded file from result.location in the upload result
    NSString * fileUrl = result.location;
    // Obtain the file crc64
    NSString * crc64 = [[result __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
}];
[put setInitMultipleUploadFinishBlock:^(QCloudInitiateMultipartUploadResult *
                                        multipleUploadInitResult,
                                        QCloudCOSXMLUploadObjectResumeData resumeData) {
    // After the multipart upload initialization is completed, this block will be called back, where you can obtain resumeData and uploadid
    NSString* uploadId = multipleUploadInitResult.uploadId;
}];
[[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];

QCloudCOSXMLDownloadObjectRequest * request = [QCloudCOSXMLDownloadObjectRequest new];

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

// Object key, which is the full path of the object on COS. If including a directory, the format should be "video/xxx/movie.mp4"
request.object = @"exampleobject";

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

// The size of the locally downloaded object. If downloading from the beginning, do not specify this value.
request.localCacheDownloadOffset = 100;

// Monitor download result
[request setFinishBlock:^(id outputObject, NSError *error) {
    // outputObject contains all the response http headers
    NSDictionary* info = (NSDictionary *) outputObject;
    
    // If no download path is specified, obtain the downloaded NSData in the following manner.
    NSData * data = [outputObject __originHTTPResponseData__];
}];

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

    // bytesDownload                   Bytes added
    // totalBytesDownload              Total bytes received during this download
    // totalBytesExpectedToDownload    Target bytes for this download
}];

[[QCloudCOSTransferMangerService defaultCOSTransferManager] DownloadObject:request];