Swift NSTask/bin/echo:/bin/echo:无法执行二进制文件
我正在制作一个需要运行shell脚本的OSX应用程序。这是我的swift代码:Swift NSTask/bin/echo:/bin/echo:无法执行二进制文件,swift,macos,nstask,Swift,Macos,Nstask,我正在制作一个需要运行shell脚本的OSX应用程序。这是我的swift代码: func runTask(arguments: [String]) { output.string = "" task = NSTask() task.launchPath = "/bin/bash" task.arguments = arguments; errorPipe = NSPipe() outputPipe = NSPipe() task.st
func runTask(arguments: [String]) {
output.string = ""
task = NSTask()
task.launchPath = "/bin/bash"
task.arguments = arguments;
errorPipe = NSPipe()
outputPipe = NSPipe()
task.standardError = errorPipe
task.standardOutput = outputPipe
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(didCompleteReadingFileHandle(_:)), name: NSFileHandleReadCompletionNotification, object: task.standardOutput!.fileHandleForReading)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(didCompleteReadingFileHandle(_:)), name: NSFileHandleReadCompletionNotification, object: task.standardError!.fileHandleForReading)
errorPipe.fileHandleForReading.readInBackgroundAndNotify()
outputPipe.fileHandleForReading.readInBackgroundAndNotify()
task.launch()
}
func didCompleteReadingFileHandle(sender: NSNotification) {
let data: NSData = sender.userInfo![NSFileHandleNotificationDataItem] as! NSData;
let string = NSString(data: data, encoding: NSUTF8StringEncoding)!
// The output property is a NSTextView object
output.string?.appendContentsOf(String(string))
}
现在我尝试调用runTask
方法:
runTask(["/bin/echo", "1234"])
它显示以下错误:
/bin/echo: /bin/echo: cannot execute binary file
现在我回到终端,输入了
echo 1234
,它运行得很好,没有任何问题,现在你怎么让它工作呢?谢谢。您正在执行的/bin/bash/bin/echo
在Terminal.app中也不起作用
删除/bin/bash
task.launchPath = "/bin/echo"
...
runTask(["1234"])
bash有三种主要的操作模式:
-c“some command string”
,它将执行该命令字符串- 如果您试图执行二进制文件(例如/bin/echo),只需直接执行即可,而无需使用bash:
task.launchPath = "/bin/echo" task.arguments = ["1234"]
- 如果您需要执行命令字符串(即,如果您需要shell在执行它之前对其进行解析,例如通配符得到扩展,或者有多个命令,或者…),请使用
:bash-c
task.launchPath = "/bin/bash" task.arguments = ["-c", "/bin/echo 1234; ls *"]
- 如果需要执行一个实际脚本,即其中包含shell命令的文件,则不要执行
,而是向其传递一个实际脚本:runTask
runTask(["/path/to/script", "scriptarg", "another argument"])