iphone - NSMutableArray 没有添加所有项目，只是最后一个 - Iphone/IOS/xcode

Question

我正在使用以下方法将 XML 文件中的图标加载到 NSMutableArray 中:

NSArray *iconItems = [doc nodesForXPath:kName_icon error:nil];//Root node
    for (CXMLElement *iconItem in iconItems)
    {

        NSArray *iconTempArray = [iconItem elementsForName:kName_url];
        for(CXMLElement *urlTemp in iconTempArray) 
        {
            arryTableAllIcons = [[NSMutableArray alloc] init];
            [arryTableAllIcons addObject:[NSString stringWithFormat:@"%@", urlTemp.stringValue]];

            NSLog(@"Icon Found %@",urlTemp.stringValue);

       break;
        }

我试图通过以下方式在我的表中显示它:(这是在 -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath )

cell.textLabel.text = [arryTableAllIcons objectAtIndex:indexPath.row];

计数似乎有效，因为我有正确数量的单元格，但表格中的单元格为空，最后一个图标的 1 个单元格在

中找到文本

The count is just:  `return [arryTableAllIcons count];`

我的 NSLog 带回了正确的文本

2011-11-07 10:30:23.692 Del Search[2791:f203] Icon Found guideDogs_off.png
2011-11-07 10:30:23.692 Del Search[2791:f203] Icon Found WheelchairAssist_off.png
2011-11-07 10:30:23.739 Del Search[2791:f203] Icon Found walk_off.png
2011-11-07 10:30:23.740 Del Search[2791:f203] Icon Found DisabledWc_off.png
2011-11-07 10:30:23.741 Del Search[2791:f203] Icon Found hearingaid_off.png
2011-11-07 10:30:23.741 Del Search[2791:f203] Icon Found loop_off.png
2011-11-07 10:30:23.742 Del Search[2791:f203] Icon Found carpark_off.png
2011-11-07 10:30:23.742 Del Search[2791:f203] Icon Found dropcounter_off.png
2011-11-07 10:30:23.743 Del Search[2791:f203] Icon Found staff_off.png
2011-11-07 10:30:23.743 Del Search[2791:f203] Icon Found Buggy_off.png

所以我肯定只是添加了错误的数组!

任何帮助将不胜感激

Answer 1

你不断地创建新的、空的 NSMutableArrays

    for(CXMLElement *urlTemp in iconTempArray) 
    {
        arryTableAllIcons = [[NSMutableArray alloc] init];
        [arryTableAllIcons addObject:[NSString stringWithFormat:@"%@", urlTemp.stringValue]];

        NSLog(@"Icon Found %@",urlTemp.stringValue);

   break;
    }

要么预先分配/初始化 arryTableAllIcons，要么检查它不是 nil

    for(CXMLElement *urlTemp in iconTempArray) 
    {
        if (!arryTableAllIcons)
            arryTableAllIcons = [[NSMutableArray alloc] init];
        [arryTableAllIcons addObject:[NSString stringWithFormat:@"%@", urlTemp.stringValue]];

        NSLog(@"Icon Found %@",urlTemp.stringValue);

   break;
    }

此外，该 break 语句将在第一次传递时退出封闭的 for 循环，因此我认为它不应该存在

    for(CXMLElement *urlTemp in iconTempArray) 
    {
        if (!arryTableAllIcons)
            arryTableAllIcons = [[NSMutableArray alloc] init];
        [arryTableAllIcons addObject:[NSString stringWithFormat:@"%@", urlTemp.stringValue]];

        NSLog(@"Icon Found %@",urlTemp.stringValue);
    }