更新数据并在UITableView iOS上显示

Question

我有一个问题：更新UITableView中的数据。我想从服务器的响应parseXML中获取新数据，并将新数据更新到UITableView**我使用了以下代码，但它不会在表视图中显示新数据。我写了一个UpdateArray()函数来检查新数据，然后比较2 Array，如果[Array count]不同，那么我调用[tableview reloadData];

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
        return 1;
    }
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        return [temp count];
    }
    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        return 90;
    }

      - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
        {
        static NSString *CellIdentifier = @"Cell";
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil)
        {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

            UILabel *FileNameLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 100, 30)];
            FileNameLabel.backgroundColor = [UIColor clearColor];
            FileNameLabel.font = [UIFont fontWithName:@"Helvetica" size:16];
            FileNameLabel.font = [UIFont boldSystemFontOfSize:16];
            FileNameLabel.textColor = [UIColor blackColor];
            NSLog(@"Reseversed TEMP array %@",temp);
            FileNameLabel.text =[temp objectAtIndex:indexPath.row];
            [cell.contentView addSubview: FileNameLabel];
            [FileNameLabel release];
            UILabel *UploadTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, 300, 25)];
            UploadTimeLabel.backgroundColor = [UIColor clearColor];
            UploadTimeLabel.font = [UIFont fontWithName:@"Helvetica" size:14];
            UploadTimeLabel.textColor = [UIColor grayColor];
            UploadTimeLabel.text = [UploadTimeArray objectAtIndex:indexPath.row];
            [cell.contentView addSubview: UploadTimeLabel];
            [UploadTimeLabel release];
            UILabel *CompleteLabel = [[UILabel alloc] initWithFrame:CGRectMake(140, 12, 170, 25)];
            CompleteLabel.backgroundColor = [UIColor clearColor];
            CompleteLabel.font = [UIFont fontWithName:@"Helvetica" size:14];
            CompleteLabel.textColor = [UIColor darkGrayColor];
            CompleteLabel.text =@"Completed";
            CompleteLabel.textAlignment = NSTextAlignmentRight;
            [cell.contentView addSubview: CompleteLabel];
            [CompleteLabel release];
        }
            return cell;
    }

UpdateArray()

 -(void)updateArray{
   while (loop)
   {
        [NSThread sleepForTimeInterval:4.0];
        [FileCompletedArray removeAllObjects];
     // [temp removeAllObjects];
      ....
        AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:afRequest];
        [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
            NSLog(@"Success");
            NSString * parsexmlinput = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
            NSLog(@"Response in Loop CompleteView: %@", parsexmlinput); 
           // dispatch_async(dispatch_get_main_queue(), ^{
                [self parseXMLFile:parsexmlinput];
            NSLog(@"File Completed array: %@", FileCompletedArray);
            NSLog(@"File Temp out array: %@", temp);
            NSLog(@"File Completed count: %lu",(unsigned long)[ FileCompletedArray count]);
            NSLog(@"File Temp out count: %lu", (unsigned long)[temp count]);
            // NSLog(@"State: %@", state);
            if([FileCompletedArray count ] != [temp count])
            {
                [temp removeAllObjects];
                temp= [FileCompletedArray mutableCopy];
                [_tableView reloadData];
            }
            else
            {
               NSLog(@"2 array equal");
            }
   //});
        }
      failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                              NSLog(@"error: %@", error);
                                          }
         ];
        [httpClient enqueueHTTPRequestOperation:operation];
   }
}

你能帮我吗？提前谢谢。

Answer 1

我看不出您调用了reloadData。

编辑：

您必须检查

1-Temp有对象，我的意思是[Temp计数]没有返回零。

2-检查两个数组的if条件被触发。我的意思是，调用了重新加载数据。

3-你可以在单元格后面设置一个断点。查看addsubview并检查单元格现在包含什么？

Answer 2

调用之前

[_tableView reloadRowsAtIndexPaths:[_tableView indexPathsForVisibleRows]
                                 withRowAnimation:UITableViewRowAnimationNone];

你必须打电话给

[_tableView beginUpdates];
...
[_tableView endUpdates];

或致电

[_tableView reloadData];

Answer 3

如果刷新表视图，请尝试以下行&检查：

[[self mytableview] reloadData];

mytableview是表视图的obj，您在这里给出您的表视图对象。