使用Swift将NSTask实时输出到NSTextView

您可以使用通知从管道异步读取。这是一个演示其工作原理的简单示例，希望可以帮助您入门：

let task = NSTask()task.launchPath = "/bin/sh"task.arguments = ["-c", "echo 1 ; sleep 1 ; echo 2 ; sleep 1 ; echo 3 ; sleep 1 ; echo 4"]let pipe = NSPipe()task.standardOutput = pipelet outHandle = pipe.fileHandleForReadingoutHandle.waitForDataInBackgroundAndNotify()var obs1 : NSObjectProtocol!obs1 = NSNotificationCenter.defaultCenter().addObserverForName(NSFileHandleDataAvailableNotification,    object: outHandle, queue: nil) {  notification -> Void in        let data = outHandle.availableData        if data.length > 0 { if let str = NSString(data: data, encoding: NSUTF8StringEncoding) {     print("got output: (str)") } outHandle.waitForDataInBackgroundAndNotify()        } else { print("EOF on stdout from process") NSNotificationCenter.defaultCenter().removeObserver(obs1)        }}var obs2 : NSObjectProtocol!obs2 = NSNotificationCenter.defaultCenter().addObserverForName(NSTaskDidTerminateNotification,    object: task, queue: nil) { notification -> Void in        print("terminated")        NSNotificationCenter.defaultCenter().removeObserver(obs2)}task.launch()

而是

print("got output: (str)")

上面的代码假定运行循环处于活动状态（在默认的Cocoa应用程序中就是这种情况）。