NSOpenPanel 在 Objective-C 中获取文件名? [英] NSOpenPanel get filename in Objective-C?

问题描述

当我创建一个 NSOpenPanel 时，像这样:

When I create an NSOpenPanel, like this:

int i;

NSOpenPanel* openDlg = [NSOpenPanel openPanel];
[openDlg setCanChooseFiles:YES];
[openDlg setCanChooseDirectories:YES];

if ([openDlg runModalForDirectory:nil file:nil] == NSOKButton)
{
    NSArray* files = [openDlg filenames];

    for( i = 0; i < [files count]; i++ )
    {
        NSString* fileName = [files objectAtIndex:i];
        NSLog(fileName);
        NSString *catched = fileName;
        [self performSelector:@selector(decompresss2z:) withObject:catched];
    }
}

当我登录 fileName 时，它是正确的并打印我的文件完整目录，但是当我尝试将它与我的 void 一起使用时，它变得像超级奇怪的字母，就像 ÿ^0f 完全随机.为什么?

And when I log fileName, it is correct and prints my file full directory, but when I try to use it with my void, it gets like super weird letters, like ÿ^0f totally random. Why?

推荐答案

该代码没有任何问题.实际上，该代码有许多不太理想的地方，但没有什么可以使它不起作用.decompresss2z: 函数是什么样的?

There's nothing wrong with that code. Actually, there are a number of things that are less than ideal about that code, but nothing that will make it not work. What does the decompresss2z: function look like?

如果这是我的代码，我会进行以下更改:

If this were my code, I'd make the following changes:

1. runModalForDirectory:file: 已弃用；你应该使用 runModal 代替.
2. filenames 已弃用；您应该改用 URLs(您可以在每个 URL 上调用 path 以获取文件名).
3. NSLog 的参数需要是格式字符串，否则可能会发生奇怪的事情.
4. 您应该使用快速枚举(使用 in 关键字)，而不是循环遍历带有索引的容器.它不仅效率更高，而且代码更少(而且代码越少越好).
5. 没有理由在此处调用 performSelector:withObject:；只需正常调用该方法即可.

1. runModalForDirectory:file: is deprecated; you should use runModal instead.
2. filenames is deprecated; you should use URLs instead (you can call path on each URL to get the filename).
3. NSLog's parameter needs to be a format string, or else odd things can happen.
4. You should use fast enumeration (with the in keyword), rather than looping through a container with an index. It's not only more efficient, it's less code (and less code is better).
5. There's no reason to call performSelector:withObject: here; just call the method normally.

重写，看起来像这样:

NSOpenPanel* openDlg = [NSOpenPanel openPanel];
[openDlg setCanChooseFiles:YES];
[openDlg setCanChooseDirectories:YES];

if ( [openDlg runModal] == NSOKButton )  // See #1
{
    for( NSURL* URL in [openDlg URLs] )  // See #2, #4
    {
        NSLog( @"%@", [URL path] );      // See #3
        [self decompresss2z:[URL path]]; // See #5
    }
}   

同样，这些更改都不会改变您的实际问题.为了进一步提供帮助，我们需要查看更多代码.具体来说，我想看看 decompressss2z: 是什么样子.

Again, though, none of these changes will change your actual issue. In order to help further, we need to see more code. Specifically, I'd like to see what decompressss2z: looks like.

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