macos 如何获取 Mac OS X 上的默认临时目录？
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How do I get the default temporary directory on Mac OS X?
提问by Abizern
I'd like to create some directories of data for some unit tests and I'd like these directories to be in the default temporary directory for the user.
我想为某些单元测试创建一些数据目录，并且我希望这些目录位于用户的默认临时目录中。
I could just create a subdir under /tmp I suppose, but I don't want to make an assumption about how somebody has set up their own machine.
我想我可以在 /tmp 下创建一个子目录，但我不想假设有人如何设置自己的机器。
I'm planning on writing the test data on the fly, which is why I'd like to put this into a temporary directory.
我打算即时编写测试数据，这就是我想将其放入临时目录的原因。
采纳答案by Abizern
Looking back at this question there and the documentation for NSTemporaryDirectory(), if you are using 10.6 or above, then you are recommended to use the URLForDirectory:inDomain:appropriateForURL:create:error:method from NSFileManager for a more flexible method of creating directories.
回头看看这个问题和 NSTemporaryDirectory() 的文档，如果你使用的是 10.6 或更高版本，那么建议你使用NSFileManager 中的 URLForDirectory:inDomain:properForURL:create:error:方法以获得更灵活的创建目录的方法.
And it returns a URL instead of a string path, which is another thing we're recommended to use.
它返回一个 URL 而不是字符串路径，这是我们推荐使用的另一件事。
回答by Dave Dribin
Don't use tmpnam()or tempnam(). They are insecure (see the man pagefor details). Don't assume /tmp. Use NSTemporaryDirectory()in conjunction with mkdtemp(). NSTemporaryDirectory()will give you a better directory to use, however it can return nil. I've used code similar to this:
不要使用tmpnam()或tempnam()。它们是不安全的（有关详细信息，请参阅手册页）。不要假设/tmp。使用NSTemporaryDirectory()会同mkdtemp()。 NSTemporaryDirectory()会给你一个更好的目录来使用，但是它可以返回nil. 我使用过类似的代码：
NSString * tempDir = NSTemporaryDirectory();
if (tempDir == nil)
tempDir = @"/tmp";
NSString * template = [tempDir stringByAppendingPathComponent: @"temp.XXXXXX"];
NSLog(@"Template: %@", template);
const char * fsTemplate = [template fileSystemRepresentation];
NSMutableData * bufferData = [NSMutableData dataWithBytes: fsTemplate
length: strlen(fsTemplate)+1];
char * buffer = [bufferData mutableBytes];
NSLog(@"FS Template: %s", buffer);
char * result = mkdtemp(buffer);
NSString * temporaryDirectory = [[NSFileManager defaultManager]
stringWithFileSystemRepresentation: buffer
length: strlen(buffer)];
You can now create files inside temporaryDirectory. Remove the NSLogsfor production code.
您现在可以在temporaryDirectory. 删除NSLogsfor 生产代码。
回答by Abizern
In Objective-C you can use NSTemporaryDirectory().
在 Objective-C 中，您可以使用 NSTemporaryDirectory()。
回答by Jasper Bekkers
Use the tempnam(), tmpnam() or tmpfile()function.
