Question

所以，我有一个UITableView显示app Documents文件夹的内容。在该文件夹中，我有9个文本文件，分别为1.txt，2.txt，3.txt等。我已设法获取所选行，但现在我需要加载与所选文件对应的txt。例如，如果我触摸2.txt，详细信息视图应该打开2.txt文件上的内容。这是我无法工作的部分。在此先感谢：）

Answer 1

当您选择行时，将调用表视图委托方法：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

在此方法中，您可以通过以下方式构建文件名：


NSString *fileName = [DocumentsFolder stringByAppendingPathComponent:[NSString stringWithFormat:@"%d.txt",indexPath.row+1]];

注意我是如何使用indexPath.row（即所选单元格的行号）来构建文件名的。我想在示例中第一行（索引为0）导致文件名1.txt

现在您可以加载此文件。

Answer 2

在didSelectRowAtIndexPath：方法中，您可以执行以下操作：

NSString *path = [[NSBundle mainBundle] pathForResource:@"file" ofType:@"txt"];  //< or getting the file from the documents folder
NSString *fileText = [NSString stringWithContentsOfFile:path]; //< this line actually reads the text in the file at the path provided
detailViewController.detailString = fileText;
[self.navigationController pushViewController:detailViewController animated:YES];

（如果在运行时创建文本文件，则使用documents文件夹;如果文件与应用程序打包，则使用NSBundle方法）

然后在viewDidLoad方法的detailViewController中你会输入如下内容：

detailLabel.text = self.detailString;

其中detailLabel是UILabel或UITextField，具体取决于您是否希望它可编辑等。

Answer 3

所以我混合了两个例子并设法在NSLog上看到文本的内容，但没有在DetailViewController上看到。这是我用来做的代码：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *fileName = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%d.txt",indexPath.row+1]];
    NSString *fileText = [NSString stringWithContentsOfFile:fileName]; //< this line actually reads the text in the file at the path provided
    DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
    detailViewController.labelName.text = NSString = [stringWithContentsOfFile:fileName];

    [self.navigationController pushViewController:detailViewController animated:YES];

    NSLog(@"didSelectRowAtIndexPath: row=%d", indexPath.row);
    NSLog(fileText);

    [tableView deselectRowAtIndexPath:indexPath animated:YES]; 
    [detailViewController release];
}

Answer 4

好的方法是：

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *fileName = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%d.txt",indexPath.row+1]];
        NSString *fileText = [NSString stringWithContentsOfFile:fileName]; //< this line actually reads the text in the file at the path provided
        DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
        detailViewController.strName = fileText;

        [self.navigationController pushViewController:detailViewController animated:YES];


        [tableView deselectRowAtIndexPath:indexPath animated:YES]; 

    [detailViewController release];
}

请注意我在这里更改了：

detailViewController.labelName = fileText;

要：

detailViewController.strName = fileText;

现在文件出现了：D 非常感谢！

点击UITableView时加载文本文件

4 个答案: