怎样可以在一个block里addobject to dataSource

[y9du]

Hi,

我想把AWS dynamoDB里的data 加入到dataSource里， 在block里可以添加，可是离开了block， dataSource就是空的了。我知道是因为block在return [dataSource copy]之后在complete，请问有什么解决方法吗？谢谢

• (NSArray *)newDataSource {

  // __block NSMutableArray *dataSource = [[NSMutableArray alloc] init];

  __block NSMutableArray *dataSource = nil;
  dataSource = [[NSMutableArray alloc] init];

  NSDictionary *nameStyle = @{@"body":[UIFont fontWithName:@"HelveticaNeue" size:16],
  @"userName":[WPAttributedStyleAction styledActionWithAction:^{
  [[[UIAlertView alloc] initWithTitle:@"提示" message:@"点击了" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil] show];
  }],
  @"link": [UIColor blueColor]};

  listViewItem *listItem = [[listViewItem alloc] init];
  AWSDynamoDBObjectMapper *dynamoDBObjectMapper = [AWSDynamoDBObjectMapper defaultDynamoDBObjectMapper];
  AWSDynamoDBScanExpression *scanExpression = [AWSDynamoDBScanExpression new];
  scanExpression.limit = @20;
  NSDate *today = [NSDate date];
  NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
  [dateFormat setDateFormat:@"yyyy-MM-dd"];
  NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
  [timeFormat setDateFormat:@"HH:mm:00"];
  NSString *currentDate = [dateFormat stringFromDate:today];
  //NSString *currentTime = [timeFormat stringFromDate:today];
  [[dynamoDBObjectMapper scan:[Event class]
  expression:scanExpression]
  continueWithExecutor:[AWSExecutor mainThreadExecutor] withSuccessBlock:^id(AWSTask *task) {

          if (task.error) {
              NSLog(@"Scan Error: [%@]", task.error);
          }else
          {
              AWSDynamoDBPaginatedOutput *paginatedOutput = task.result;
              for (Event *item in paginatedOutput.items) {
                  if ([item.StartDate isEqualToString:currentDate]) {
                      listItem.likeCount = @"1125";
                      listItem.attrbutedComment = [item.Address attributedStringWithStyleBook:nameStyle];
                   [dataSource addObject:listItem];
                      NSLog(@"block dataSource array has %@",dataSource);
                  }
              }
  
          NSLog(@"Scan Succeeded");
          }
          return nil;}
    ];
  

  NSLog(@"dataSource array has %@",dataSource);
  return [dataSource copy];
  }