Object ACLs, similar to bucket ACLs, support pre-defined access control policies and direct configuration. For details, see Managing Bucket ACLs.

An object ACL can be configured in two modes:

1. Specify a pre-defined access control policy during object upload.
2. Call OBSSetObjectACLRequest to set the ACL directly.

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
NSString *SK = @"*** Provide your Secret Key ***";
NSString *AK = @"*** Provide your Access Key ***";
    
// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Upload a file.
OBSPutObjectWithFileRequest *request = [[OBSPutObjectWithFileRequest alloc]initWithBucketName:@"bucketname" objectKey:@"objectname" uploadFilePath:_imagePath];
    
//Set the access control policy of the object to public-read-write.
request.objectACLPolicy = OBSACLPolicyPublicRead;
    
    
request.uploadProgressBlock = ^(int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend) {
    NSLog(@"%0.1f%%",(float)floor(totalBytesSent*10000/totalBytesExpectedToSend)/100);
};
    
[client putObject:request completionHandler:^(OBSPutObjectResponse *response, NSError *error){
    NSLog(@"%@",response.etag);
}];

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
NSString *SK = @"*** Provide your Secret Key ***";
NSString *AK = @"*** Provide your Access Key ***";
    
// Initialize identity authentication.
 OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
//Set the object ACL directly.
// Initialize an instance of OBSUser.
OBSUser *owner = [[OBSUser alloc] initWithID:@"owner id"];
// Grantees
OBSACLGranteeUser *grantee = [[OBSACLGranteeUser alloc]initWithID:@"grantee id"];
//Object ACL
OBSACLGrant *grant = [[OBSACLGrant alloc]initWithGrantee:grantee permission:OBSACLFull_Control];
OBSAccessControlPolicy *policy = [OBSAccessControlPolicy new];
policy.owner = owner;
[policy.accessControlList addObject:grant];
for(int i=0;i<=20;i++){
    [policy.accessControlList addObject:grant];
}
    
// Set the object ACL.
OBSSetObjectACLRequest *request = [[OBSSetObjectACLRequest alloc]initWithBucketName:@"bucketname" objectKey:@"objectname" accessControlPolicy:policy];
[client setObjectACL:request completionHandler:^(OBSSetObjectACLResponse *response, NSError *error){
    NSLog(@"%@",response);
}];

The owner or grantee ID needed in the ACL indicates the account ID, which can be viewed on the My Credentials page of OBS Console.

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
NSString *SK = @"*** Provide your Secret Key ***";
NSString *AK = @"*** Provide your Access Key ***";
    
// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Obtain the ACL of an object.
OBSGetObjectACLRequest *request = [[OBSGetObjectACLRequest alloc]initWithBucketName:@"bucketname" objectKey:@"objectname"];
[client getObjectACL:request completionHandler:^(OBSGetObjectACLResponse *response, NSError *error){
    NSLog(@"%@",response);
}];