xcode NSOpenPanel 在 Objective-C 中获取文件名？
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NSOpenPanel get filename in Objective-C?
提问by user1568364
When I create an NSOpenPanel, like this:
当我创建一个 NSOpenPanel 时，像这样：
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];
}
}
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 ?^0f totally random. Why?
当我登录时fileName，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 ?^0f 完全随机。为什么？
回答by zpasternack
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?
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？
If this were my code, I'd make the following changes:
如果这是我的代码，我会进行以下更改：
runModalForDirectory:file:is deprecated; you should userunModalinstead.filenamesis deprecated; you should useURLsinstead (you can callpathon each URL to get the filename).NSLog's parameter needs to be a format string, or else odd things can happen.- You should use fast enumeration (with the
inkeyword), rather than looping through a container with an index. It's not only more efficient, it's less code (and less code is better). - There's no reason to call
performSelector:withObject:here; just call the method normally.
runModalForDirectory:file:已弃用；你应该runModal改用。filenames已弃用；您应该URLs改用（您可以调用path每个 URL 来获取文件名）。NSLog的参数必须是格式字符串，否则可能会发生奇怪的事情。- 您应该使用快速枚举（使用
in关键字），而不是遍历带有索引的容器。它不仅效率更高，而且代码更少（代码越少越好）。 - 没有理由在
performSelector:withObject:这里打电话；只需正常调用该方法。
Rewritten, it would look like this:
重写后，它看起来像这样：
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
}
}
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.
不过，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: 是什么样的。
