Swift nsprintoperation-检查用户选择了什么

使用此代码，我可以打印pdf文件：

let dictDocuments = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
let completePath = dictDocuments.appendingPathComponent("test.pdf")
let pdfDocument = PDFDocument(url: completePath!)

let printInfoDict = NSMutableDictionary(dictionary: NSPrintInfo.shared().dictionary())
printInfoDict.setObject(NSPrintSpoolJob, forKey: NSPrintJobDisposition as NSCopying)
let printInfo = NSPrintInfo(dictionary: printInfoDict as! [String : Any])
printInfo.isHorizontallyCentered = true
printInfo.isVerticallyCentered = true
printInfo.scalingFactor = 1.5


let printOp = pdfDocument!.printOperation(for: printInfo, scalingMode: .pageScaleNone, autoRotate: true)!
printOp.runModal(for: self.view.window!, delegate: self, didRun: nil, contextInfo: nil)

我可以检查用户在打印面板中选择了哪个按钮吗？（取消或打印）

从

didRunSelector

参数指定的方法必须具有以下签名：

func printOperationDidRun(_ printOperation NSPrintOperation, success: Bool, contextInfo: UnsafeMutableRawPointer?)

如果打印操作运行到完成时没有取消或错误，则成功的值为

true

，否则为

false

如果将参数为

true

的

canspawneSeparateThread

发送到

NSPrintOperation

对象，则在随后调用

runOperationModalForWindow:delegate:didRunSelector:contextInfo:

时指定的委托可能会在生成的非主线程中发送消息

对于swift 5.1：

// prepare printOp
...

{
        //was: printOp.run()

        if let w = NSApp.mainWindow{
            let selector = #selector(printOperationDidRun(printOperation: success: contextInfo:))
            printOp.runModal(for: w, delegate: self,
                             didRun: selector,
                             contextInfo: nil)
        }
    }

    // apple docs:
    // - (void)printOperationDidRun:(NSPrintOperation *)printOperation  success:(BOOL)success  contextInfo:(void *)contextInfo

     @objc func printOperationDidRun( printOperation: NSPrintOperation,
                                      success: Bool,
                                      contextInfo: UnsafeMutableRawPointer?){
        // use callback..

    }

---

是的，我是这个医生。但是我不知道如何使用它：（而不是

…didRun:nil…

传递一个

选择器
…didRun:#选择器（printOperationDidRun（u:success:contextInfo:）
并实现该方法。啊，好的，谢谢。我尝试了
didRun:printOperation…
但是“选择器方式”对我来说是新的