iphone - 使用 XML 中的数据填充 UITableView

Question

在我的 iPhone 应用程序中，我想用从 Web 服务获取的 XML 文件中的数据填充我的 UITableView。我已经获得了正确的数据，并且我还可以使用 RaptureXML 解析它。我之前进行了一些数据库查询(登录/授权)，然后获取 Xml(包含消息的文件)。我的问题是 UITableView 没有获取任何数据。

这是我将数据填充到表中的方法:

if([responseString isEqualToString:@"true"])
    {
        NSLog(@"Iphone successfully registered !");

        NSURL *baseURL = [NSURL URLWithString:@"http://pathtomywebservice/"];



        AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
        [httpClient defaultValueForHeader:@"Accept"];
        [httpClient setDefaultHeader:@"Accept" value:@"text/xml"];

        NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                                udid, @"uuid",
                                nil];

        [httpClient postPath:@"getvMess" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
            // reponseObject will hold the data returned by the server.

            NSString *responseString = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
            NSLog(@"response: %@", responseString);

            RXMLElement *rxml = [RXMLElement elementFromXMLString:responseString encoding:NSUTF8StringEncoding];

            subjects = [[NSMutableArray alloc] init];
            senders = [[NSMutableArray alloc] init];
            texts = [[NSMutableArray alloc] init];
            times = [[NSMutableArray alloc] init];
            channels = [[NSMutableArray alloc] init];

            NSArray *apps = [rxml children:@"ifxMessage"];
            [rxml iterateElements:apps usingBlock:^(RXMLElement *appElement) {

                [subjects addObject:[appElement child:@"subject"].text];
                NSLog(@"%@",[appElement child:@"subject"].text);
                [times addObject:[appElement child:@"time"].text];
                [texts addObject:[appElement child:@"text"].text];
                [senders addObject:[appElement child:@"sender"].text];
                [channels addObject:[appElement child:@"receiver"].text];                                        


            }];


        }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"Error retrieving data: %@", error);
        }];

    }


}failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error retrieving data: %@", error);
}];

这里是填写表格的具体代码:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
    // Return the number of rows in the section.
    return [subjects count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    // Configure the cell...
    // A cell identifier which matches our identifier in IB
    static NSString *CellIdentifier = @"CellIdentifier";

    // Create or reuse a cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    // Get the cell label using its tag and set it
    UILabel *cellLabelSubject = (UILabel *)[cell viewWithTag:1];
    [cellLabelSubject setText:[subjects objectAtIndex:indexPath.row]];

    //Get the cell's channel and its tag and set it
    UILabel *cellLabelChannel = (UILabel *)[cell viewWithTag:3];
    [cellLabelChannel setText:[channels objectAtIndex:indexPath.row]];

    //Get the cell's text and its tag and set it
    UITextView *cellTextViewText = (UITextView *)[cell viewWithTag:4];
    [cellTextViewText setText:[texts objectAtIndex:indexPath.row]];

    //Get the cell's time and its tag and set it
    UILabel *cellLabelTime = (UILabel *)[cell viewWithTag:5];
    [cellLabelTime setText:[times objectAtIndex:indexPath.row]];

    //Get the cell's sender and its tag and set it
    UILabel *cellLabelSender = (UILabel *)[cell viewWithTag:6];
    [cellLabelSender setText:[senders objectAtIndex:indexPath.row]];



    // get the cell imageview using its tag and set it
    UIImageView *cellImage = (UIImageView *)[cell viewWithTag:2];
    [cellImage setImage:[UIImage imageNamed:[NSString stringWithFormat:@"%new_message.png", indexPath.row]]];

    return cell;
}

但是当我从本地 xml 文件填充表格时，它工作正常:

subjects = [[NSMutableArray alloc] init];
            senders = [[NSMutableArray alloc] init];
            texts = [[NSMutableArray alloc] init];
            times = [[NSMutableArray alloc] init];
            channels = [[NSMutableArray alloc] init];

            RXMLElement *rxml = [RXMLElement elementFromXMLFile:@"Messages.xml"];

            NSArray *apps = [rxml children:@"ifxMessage"];
            [rxml iterateElements:apps usingBlock:^(RXMLElement *appElement) {

                [subjects addObject:[appElement child:@"subject"].text];
                [times addObject:[appElement child:@"time"].text];
                [texts addObject:[appElement child:@"text"].text];
                [senders addObject:[appElement child:@"sender"].text];
                [channels addObject:[appElement child:@"receiver"].text];



            }];

Answer 1

因为您没有将标签、文本...等添加到单元格中...

[cell addSubview:cellLabelSubject];
[cell addSubview:cellLabelChannel];
[cell addSubview:cellTextViewText];
[cell addSubview:cellLabelTime];
[cell addSubview:cellLabelSender];
[cell addSubview:cellImage];