本文介绍列举桶内的多版本对象的示例代码，每次最大返回 1000 个对象。
如下代码展示如何列举多版本对象。
// 从STS服务获取的临时访问密钥和安全令牌（AccessKey、SecretKey、SecurityToken） TOSCredential *credential = [[TOSCredential alloc] initWithAccessKey:@"accesskey" secretKey:@"secretkey" securityToken:@"securityToken"]; TOSEndpoint *tosEndpoint = [[TOSEndpoint alloc] initWithURLString:@"endpoint" withRegion:@"region"]; TOSClientConfiguration *config = [[TOSClientConfiguration alloc] initWithEndpoint:tosEndpoint credential:credential]; TOSClient *client = [[TOSClient alloc] initWithConfiguration:config]; TOSListObjectVersionsInput *listVersions = [[TOSListObjectVersionsInput alloc] init]; listVersions.tosBucket = @"bucket-name"; TOSTask *task = [client listObjectVersions:listVersions]; [task continueWithBlock:^id(TOSTask *task) { if (!task.error) { NSLog(@"List object versions success."); TOSListObjectVersionsOutput *output = task.result; } else { NSLog(@"List object versions failed, error: %@" ,task.error); } return nil; }];