从NSDocumentDirectory iOS

Question

我想从某个特定的URL下载NSFileManager中的文件（pdf，doc，docx等）。稍后，当用户点击同一链接时，我想从NSFileManager中检索文件。以下是我已完成的代码：

    - (void)checkIfFileExist {

    NSString *path1;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    path1 = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Content-Directory"];
    path1 = [path1 stringByAppendingPathComponent:@"sample.pdf"];
    NSLog(@"The read path is %@", path1);
    if ([[NSFileManager defaultManager] fileExistsAtPath:path1])
    {
        //File exists
        NSData *file1 = [[NSData alloc] initWithContentsOfFile:path1];
        if (file1)
        {


        }
    }
    else
    {
        NSURL *url = [NSURL URLWithString:@"http://fzs.sve-mo.ba/sites/default/files/dokumenti-vijesti/sample.pdf"];
        NSData *urlData = [NSData dataWithContentsOfURL:url];
        NSString *path;
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Content-Directory"];
        path = [path stringByAppendingPathComponent:@"sample.pdf"];
        NSLog(@"The written path is %@", path);
        [[NSFileManager defaultManager] createFileAtPath:path
                                                contents:urlData
                                              attributes:nil];
    }
}

现在，每当我尝试从文件管理器获取文件时，文件存在的条件总是返回FALSE。我写和读文件的路径与我在控制台上检查过的路径相同。我做过的任何错误？

Answer 1

添加此

foo

之后

if (![[NSFileManager defaultManager] fileExistsAtPath:path]){[[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:NO attributes:nil error:nil];}

在你的其他部分

并替换

path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Content-Directory"];