可可 NSTask 帮助
我需要一些有关 NSTask 的帮助。另外，我是 Cocoa / Obj-C 编程的新手，所以请耐心等待。我正在尝试制作一个目录。然后，将其移除。所以这是我到目前为止所得到的：
NSLog (@"START");
NSTask *task;
task = [[NSTask alloc] init];
[task setLaunchPath: @"/bin/mkdir"];
NSArray *arguments;
arguments = [NSArray arrayWithObjects: @"/tmp/TEMP", nil];
[task setArguments: arguments];
NSPipe *pipe;
pipe = [NSPipe pipe];
[task setStandardOutput: pipe];
[task setStandardError: pipe];
NSFileHandle *file;
file = [pipe fileHandleForReading];
NSLog (@"MKDIR");
[task launch];
[task waitUntilExit];
NSData *data;
data = [file readDataToEndOfFile];
string = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
NSLog (@"OUTPUT:\n%@", string);
[task release];
//EDIT: The following lines should be removed and [string release]; should be added.
[arguments release];
[pipe release];
[file release];
[data release];
我的问题是最后关于“发布”的部分是否正确？如果没有，有人可以帮我纠正吗？另外，如果我想做另一个“rmdir”的 NSTask，我会做“task = [[NSTask alloc] init];”对于我使用的每个变量等等，或者我需要创建新变量吗？多谢！
I need a bit of help with NSTask. Also, I am new to Cocoa / Obj-C programming, so please bear with me. I am trying to make a directory. Then, remove it. So here is what I have so far:
NSLog (@"START");
NSTask *task;
task = [[NSTask alloc] init];
[task setLaunchPath: @"/bin/mkdir"];
NSArray *arguments;
arguments = [NSArray arrayWithObjects: @"/tmp/TEMP", nil];
[task setArguments: arguments];
NSPipe *pipe;
pipe = [NSPipe pipe];
[task setStandardOutput: pipe];
[task setStandardError: pipe];
NSFileHandle *file;
file = [pipe fileHandleForReading];
NSLog (@"MKDIR");
[task launch];
[task waitUntilExit];
NSData *data;
data = [file readDataToEndOfFile];
string = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
NSLog (@"OUTPUT:\n%@", string);
[task release];
//EDIT: The following lines should be removed and [string release]; should be added.
[arguments release];
[pipe release];
[file release];
[data release];
My question is if the part towards the end about "release"-ing is correct? If not, can someone help me correct it? Also, if I wanted to do another NSTask of "rmdir", would I just do "task = [[NSTask alloc] init];" and so on for each variable I used or will I need to make new variables? THANKS A LOT!
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首先，不，您没有正确管理内存（提示：上面只有
task被正确处理）。 阅读本文，因为它解释了所有内容。其次，不需要使用 NSTask 实例来创建/删除目录。你应该使用 NSFileManager 来代替；再次 - 文档< /a> 解释了一切。
First, no, you aren't managing memory correctly (hint: only
taskis correctly handled above). Read this as it explains all.Secondly, there is no need to use an
NSTaskinstance to make/delete a directory. You should useNSFileManagerinstead; again -- the documentation explains all.