用awk与NSTask [英] Using awk with NSTask

问题描述

我将如何使用此awk命令：

How would I use this awk command:

awk 'NR>1{print $1}' string-to-modify

与NSTask？我已经尝试设置的/ usr / bin中/ AWK作为启动路径，'NR大于1 {打印$ 1} 作为参数，则该字符串修改为另一种说法，但我得到的是这样的：

with NSTask? I already tried setting /usr/bin/awk as the launch path, 'NR>1{print $1}' as an argument, then the string to modify as another argument but all I get is this:

/usr/bin/awk: syntax error at source line 1
 context is
     >>> ' <<< 
/usr/bin/awk: bailing out at source line 1

任何帮助将是AP preciated：）

Any help would be appreciated :)

推荐答案

首先，删除单引号： NSTask 不invoque壳可能跨preT他们。这是你的错误的原因。

First, remove single quotes: NSTask doesn't invoque a shell which could interpret them. This is the cause of the error you get.

二， AWK 一个文件名作为最后一个参数，而不是字符串。如果你真的需要NSTask和awk，shell命令将回声串| AWK ... ，这将包括两个NSTask和NSPipe。

Second, awk takes a filename as last argument, not a string. If you really need NSTask and awk, the shell command would be echo string | awk ..., which would involve two NSTask and a NSPipe.

最后，对于字符串manupulation，使用的NSString代替，如提到的dreamlax.

Finally, for string manupulation, use NSString instead, as mentioned by dreamlax.

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