如何从命令行编译 Swift

Question

我有这 3 个文件：

索引.swift

import Cocoa

print("Init")
let app = NSApplication.shared()
let delegate = AppDelegate()  // alloc main app's delegate class
app.delegate = delegate      // set as app's delegate
app.run()
print("End")

src/delegate.swift

import Cocoa

class AppDelegate: NSObject, NSApplicationDelegate {
    var newWindow: NSWindow?
    var controller: ViewController?

    override init() {
        print("App")
        super.init()
        mainView()
    }

    func mainView() {
        print("View")
        newWindow   = NSWindow(contentRect: NSMakeRect(10, 10, 200, 200), styleMask: [.titled, .resizable, .closable], backing: .buffered, defer: false)
        let content = newWindow!.contentView! as NSView
        controller  = ViewController()
        //controller?.loadView()
        let view = controller!.view
        content.addSubview(view)
        newWindow!.makeKeyAndOrderFront(nil)
    }

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        print("Launch")  // Not showing this?
    }

    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
        print("Bye")
        return true
    }
}

src/controller.swift

import Cocoa

class ViewController : NSViewController {
    var name = "Main"
    var button: NSButton?

    @IBAction func onClick(_: Any) {
        print("Click")
    }

    override func loadView() {
        print("Load")
        let view = NSView(frame: NSMakeRect(0,0,200,200))
        view.wantsLayer = true
        view.layer?.borderWidth = 2
        view.layer?.borderColor = NSColor.red.cgColor
        button = NSButton(frame: NSMakeRect(20, 20, 100, 32))
        button?.title = "Click Me"
        button?.target = self
        button?.action = #selector(onClick)
        view.addSubview(button!)
        self.view = view
    }
}

我尝试像这样编译它：

swift index.swift src/delegate.swift src/controller.swift

但出现此错误：

index.swift:7:16: error: use of unresolved identifier 'AppDelegate'
let delegate = AppDelegate()  // alloc main app's delegate class
               ^~~~~~~~~~~
Foundation.PortDelegate:1:17: note: did you mean 'PortDelegate'?
public protocol PortDelegate : NSObjectProtocol {
                ^
CoreText.CTRunDelegate:1:14: note: did you mean 'CTRunDelegate'?
public class CTRunDelegate {
             ^
<unknown>:0: warning: 'cacheParamsComputed' is deprecated
<unknown>:0: warning: 'cacheAlphaComputed' is deprecated
<unknown>:0: warning: 'keepCacheWindow' is deprecated
<unknown>:0: error: 'memoryless' is unavailable
Metal.MTLCommandBufferError:55:14: note: 'memoryless' has been explicitly marked unavailable here
        case memoryless
             ^

想知道如何进行此编译。基本上，我只需要知道如何从当前定义到 index.swift 范围的位置要求/导入这些类 AppDelegate 和 ViewController 。如果我将所有代码放入 1 个文件 index.swift，那么它可以正常编译。但我想像在 XCode 中那样模块化它，但不调用 XCode。想知道是否可以通过某种 plist 来解决这个问题。我尝试swift -F指定swift -I导入目录，但没有成功。

Answer 1

正如@MartinR所说，swiftc是编译器。您的swift命令调用解释器，而不是编译器。我认为解释器只能运行单个文件。

我只浏览了以下几页，但它们可能会帮助您运行由多个文件组成的 Swift 程序。

1. 使用一个简单的 shell 脚本将所有文件合并为一个，并通过解释器运行合并的文件swift：

• http://sgeos.github.io/swift/2016/02/09/getting-started-with-multi-file-command-line-swift.html

2. 使用内置 Swift 工具：

• 创建一个项目swift package init --type executable
• 用于swift build将项目编译为单个可执行文件
• https://medium.com/quick-code/lets-build-a-command-line-app-in-swift-328ce274f1cc

我通过搜索找到了这些（以及许多类似的）页面：swift command line run multiple files