ios - 在 Swift 中获取 UIPrintInteractionController 的作业状态

Question

我有一个问题:我想知道打印作业的状态。我正在打印一个临时存储在云驱动器中的 PDF 文件。我想在打印作业完成后删除该文件。我怎样才能 swift 意识到这一点？这是我的代码片段:

 // 1
    let printController = UIPrintInteractionController.sharedPrintController()
    // 2
    let printInfo = UIPrintInfo(dictionary:nil)
    printInfo.outputType = UIPrintInfoOutputType.General
    printController.showsNumberOfCopies = false
    printController.showsPageRange = false
    printInfo.jobName = "PDF ID: " + pdfObjectID
    printController.printInfo = printInfo

    // 3
    //let formatter = UIMarkupTextPrintFormatter(markupText: "Test")
    let formatter = pdf.viewPrintFormatter()
    formatter.contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    printController.printFormatter = formatter

    // show PrintController
    printController.presentAnimated(true, completionHandler: nil)

您有什么建议吗？谢谢:)

Answer 1

我自己没有测试过，但是根据文档，你可以传递 UIPrintInteractionCompletionHandler作为 completionHandler: 参数:

When a print job concludes, you can reset any state set up for printing and do related housekeeping tasks.

一个简单的例子:

    printController.presentAnimated(true) { (controller, success, error) -> Void in
        if success {
            // Printed successfully
            // Remove file here ...
        } else {
            // Printing failed, report error ...
        }
    }