问题描述
过去几天我一直在学习Swift，但我似乎遇到了麻烦.
I've been learning Swift the past couple days, and I seem to have hit a rock.
我正在尝试创建一个ViewController窗口，其中有一个按钮和一个NSViewText.当我按下按钮时，应用程序会向用户提示带有NSTextField的工作表.按下Enter键后，NSTextField字符串将保存在变量中，并且工作表将关闭，并执行终端命令.
I am trying to create a ViewController window where I have a button and an NSViewText. When I push the button, the app prompts the user with a sheet that has an NSTextField. When pressed enter, the NSTextField string is saved in a variable and the sheet is closed, and a terminal command is executed.
现在，我在AppDelegate中的execute命令方法使用NSPipe创建了一个管道:
Now, my execute command method in AppDelegate creates a pipe with NSPipe:
let cmd = NSTask()
...
let pipe = NSPipe()
cmd.standardOutput = pipe
cmd.launch()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output: String = NSString(data: data, encoding: NSUTF8StringEncoding)!
var consoleOutput = output
return output
consoleOutput在execute方法之外，所以我试图在ViewController中显示它，如下所示:
consoleOutput is outside the execute method, so I'm trying to display it in ViewController, like this:
更改了以前的代码，但仍然出现错误:
textView.string = myDelegate.consoleOutput
我希望终端输出实时显示在NSViewText(或NSTextField或NSScrollView，NSClipView?不确定)中.我无法做的是找到一种操作NSTextView内容的方法，因为当我运行它时，会出现以下错误:
I want the terminal output to be shown within the NSViewText (or NSTextField, or NSScrollView, NSClipView? not sure which), real time. What I cannot do is find a way to manipulate the NSTextView's content, because when I run it, I get the following error:
fatal error: unexpectedly found nil while unwrapping an Optional value
任何帮助将不胜感激.
推荐答案
如果完全可以分配闭包(例如代码块)，则必须将其放在声明中的'='后面，而不是:在LHS上.您基本上是在尝试将类型声明为静态代码块.我很惊讶编译器使您摆脱了所有抱怨IBOutlet方面本身的问题.
If assigning a closure (e.g. code block) would work at all, you'd have to put it after an '=' in the declaration, not after the : on the LHS. You're basically trying to declare the type as a static block of code. I'm surprised the compiler it lets you get away with that all complaining only about the IBOutlet aspect itself.
这篇关于在Swift中的NSScrollView和NSTextView中显示控制台输出的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！