__block BOSDeleteObjectResponse* response = nil;
BCETask* task = [client deleteObject:@"<bucketname>" objectKey:@"<objectname>"];
task.then(^(BCEOutput* output) {
    if (output.response) {
        response = (BOSDeleteObjectResponse*)output.response;
        NSLog(@"delete obj success!");
    }

    if (output.error) {
        NSLog(@"delete obj failure");
    }
});
[task waitUtilFinished];

#import <BaiduBCEBasic/BaiduBCEBasic.h>
#import <BaiduBCEBOS/BaiduBCEBOS.h>

void example(void) {
    // 初始化
    BCECredentials* credentials = [[BCECredentials alloc] init];
    credentials.accessKey = @"<access key>";
    credentials.secretKey = @"<secret key>";
    BOSClientConfiguration* configuration = [[BOSClientConfiguration alloc] init];
    configuration.credentials = credentials;

    BOSClient* client = [[BOSClient alloc] initWithConfiguration:configuration];

    __block BOSDeleteObjectResponse* response = nil;
    BCETask* task = [client deleteObject:@"<bucketname>" objectKey:@"<objectname>"];
    task.then(^(BCEOutput* output) {
      if (output.response) {
          response = (BOSDeleteObjectResponse*)output.response;
          NSLog(@"delete obj success!");
      }

      if (output.error) {
          NSLog(@"delete obj failure");
      }
    });
    [task waitUtilFinished];
}