读取文档文件夹中的文本文件 - Iphone SDK

时间:2010-04-25 19:54:16

标签: ios iphone objective-c cocoa documents

我的代码如下:

    NSString *fileName = [[NSUserDefaults standardUserDefaults] objectForKey:@"recentDownload"];
    NSString *fullPath = [NSBundle pathForResource:fileName ofType:@"txt" inDirectory:[NSHomeDirectory() stringByAppendingString:@"/Documents/"]];
    NSError *error = nil;

    [textViewerDownload setText:[NSString stringWithContentsOfFile:fullPath encoding: NSUTF8StringEncoding error:&error]];
  • textviewerdownloadtextview,显示文件中的文字。实际文件名存储在名为NSUserDefault的{​​{1}}。

  • 当我构建此内容时,我会点击它所在的recentDownload和我的应用button

  • 语法或简单错误有什么问题吗?

3 个答案:

答案 0 :(得分:9)

NSBundle类用于查找应用程序包中的内容,但Documents目录位于包外,因此生成路径的方式不起作用。试试这个:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                     NSUserDomainMask,
                                                     YES);

NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:@"recentDownload.txt"]; 

答案 1 :(得分:6)

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *myPathDocs =  [documentsDirectory stringByAppendingPathComponent:@"myfile.txt"];

    if (![[NSFileManager defaultManager] fileExistsAtPath:myPathDocs])
    {
        NSString *myPathInfo = [[NSBundle mainBundle] pathForResource:@"myfile" ofType:@"txt"];
        NSFileManager *fileManager = [NSFileManager defaultManager];
        [fileManager copyItemAtPath:myPathInfo toPath:myPathDocs error:NULL];
    }       

    //Load from File
NSString *myString = [[NSString alloc] initWithContentsOfFile:myPathDocs encoding:NSUTF8StringEncoding error:NULL];

这对我有用

无论如何,谢谢大家..

答案 2 :(得分:2)

对于文本文件的读/写,请检查此url