使用Swift快速打印文本视图的内容 [英] AirPrint the contents of a Text View using Swift

问题描述

我有一个UITextView，我需要使用Swift来AirPrint内容。我试图尽可能地适应Object-C代码，但是我不知道Object-C（或如何将其转换为Swift），因此这是一个很大的挑战。这是我到目前为止所拥有的：

I have a UITextView and I need to AirPrint the contents using Swift. I've tried to adapt Object-C code as much as possible, but I don't know Object-C (or how to convert it to Swift) so it has been quite a challenge. Here is what I have so far:

    var pic:UIPrintInteractionController = .sharedPrintController()
    var viewpf:UIViewPrintFormatter = myTextView.viewPrintFormatter()
    var myData:NSData = (myTextView.text as NSString).dataUsingEncoding(NSUTF8StringEncoding)
    pic.delegate = self
    pic.showsPageRange = true
    pic.printFormatter = viewpf
    pic.printingItem = myData;
    //if (UIPrintInteractionController.canPrintData(myData)) {
        pic.presentAnimated(true, completionHandler: nil)
    //}

如果我激活 if语句，它当然会失败并且不会尝试打印。但是，如果我现在就注释掉并强制进行打印，则会弹出打印机选择对话框，从中选择启用了AirPrint的打印机。我点击了print，它与打印机通信，将其发送（告诉它）到打印机并退出...但是什么都没打印。

If I activate the "if" statement of course it fails and doesn't attempt to print. But if I comment it out as it is now and force the print attempt, it brings up the printer selection dialog where I choose my AirPrint enabled printer. I hit print and it communicates with the printer, sends it (so it says) to the printer and exits... but nothing prints.

如果有帮助的话，在这里而是打印机模拟器的结果：

If it helps any, here are the results from the printer simulator instead:

[25 / Jul / 2014：16：16：51 -0400] [客户端1]加密连接。
[25 / Jul / 2014：16：16：51 -0400] [客户端1]来自
[v1.fe80 :: 6676：baff：feb2：5e42 + en0]的连接现已加密。 p>

[25/Jul/2014:16:16:51 -0400] [Client 1] Encrypting connection. [25/Jul/2014:16:16:51 -0400] [Client 1] Connection from [v1.fe80::6676:baff:feb2:5e42+en0] now encrypted.

该输出在我选择打印机时发生，但在选择打印时不再显示。

That output happens when I choose the printer, but nothing more appears there when I choose print.

以下是一些其他信息，AppCode向我显示了这是否有帮助：

Here is some additional information AppCode shows me if this is of any help:

2014-07-25 16:16 ：50.823 LotteryOddsBoost5 [2255：23613]-[PKPaperList
matchPaper：preferBorderless：withDuplexMode：didMatch：]
paperToMatch = result = matchType = 0

2014-07-25 16:16:50.823 LotteryOddsBoost5[2255:23613] -[PKPaperList matchedPaper:preferBorderless:withDuplexMode:didMatch:] paperToMatch= result= matchType=0

2014-07-25 16：16：51.740 LotteryOddsBoost5 [2255：23613]-[PKPaperList
matchingPaper：preferBorderless：withDuplexMode：didMatch：]
paperToMatch = result = matchType = 0

2014-07-25 16:16:51.740 LotteryOddsBoost5[2255:23613] -[PKPaperList matchedPaper:preferBorderless:withDuplexMode:didMatch:] paperToMatch= result= matchType=0

2014-07-25 16：16：57.249 LotteryOddsBoost5 [2255：23613]-[PKPaperList
matchPaper：preferBorderless：withDuplexMode：didMatch：]
paperToMatch = result = matchType = 0

2014-07-25 16:16:57.249 LotteryOddsBoost5[2255:23613] -[PKPaperList matchedPaper:preferBorderless:withDuplexMode:didMatch:] paperToMatch= result= matchType=0

任何帮助都会非常感谢！我已经解决了创建该程序的很多问题，但是缺少Swift特定的文档和示例代码只是让我大吃一惊！

Any help would be GREATLY appreciated! I've worked through a ton of issues getting this program created, but the lack of Swift specific documentation and sample code are just kicking my butt on this!

非常感谢！

推荐答案

我认为您通过提供视图格式化程序和要打印的数据而感到困惑。尝试：

I think you're confusing it by offering both the view formatter and data to print. Try:

var pic:UIPrintInteractionController = .sharedPrintController()
var viewpf:UIViewPrintFormatter = myTextView.viewPrintFormatter()

pic.delegate = self
pic.showsPageRange = true
pic.printFormatter = viewpf
pic.presentAnimated(true, completionHandler: nil)

这篇关于使用Swift快速打印文本视图的内容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IT屋！