如何在 iPhone 中读取文件？

Question

我正在尝试从我的文档目录中以 NSString 的形式读取 .txt 文件。知道如何将文件读入 NSString 吗？

谢谢...

Answer 1

使用 NSString 的 stringWithContentsOfFile: 方法。

NSString *fileContents = [NSString stringWithContentsOfFile:@"some/file.txt"];

Answer 2

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];

无论如何，这对我有用

，谢谢大家..

Answer 3

希望这就是您想要的：

NSString *myString  = [[NSString alloc] initWithContentsOfFile:@"pathToFile"];

我通常在应用程序文档目录中查找它。

Answer 4

希望这会有所帮助...

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,  YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileContents=[documentsDirectory stringByAppendingPathComponent:@"file.txt"];

编码快乐...

Answer 5

我认为这是从 DocumentDirectory 读取 .txt 文件的最佳方法。

 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"txtFile.txt"];
    NSString *content = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];

我希望这对你有用！