打印UITextView(使用蓝牙打印机)不会保留换行符 [英] Printing a UITextView (with a bluetooth printer) does not preserve line breaks

问题描述

在我的应用中，我有一个UITextView实例和一个UIButton实例拖到我的View Controller中.

In my app, I have a UITextView instance and a UIButton instance dragged onto my View Controller.

每当按下按钮时，它都会在TextView中获取文本，并将数据发送到打印机进行打印.

Whenever the Button is pressed, it takes the text in the TextView, and sends the data to a printer to be printed.

在ViewDidLoad()方法中，我正在编译一个字符串并将其加载到TextView中.

In my ViewDidLoad() method, I am compiling a string and loading that into my TextView.

我的全班同学看起来像这样:

My full class looks like this:

class CSTSummaryViewController: UIViewController {

    @IBOutlet weak var summaryReport: UITextView!

    @IBAction func Print(sender: AnyObject) {
        let printController = UIPrintInteractionController.sharedPrintController()
        let printInfo = UIPrintInfo(dictionary: nil)
        printInfo.outputType = UIPrintInfoOutputType.General
        printInfo.jobName = "Print Summary"
        printController.printInfo = printInfo

        let format = UIMarkupTextPrintFormatter(markupText: summaryReport.text)
        format.contentInsets = UIEdgeInsets(top: 72, left: 72, bottom: 72, right: 72)
        printController.printFormatter = format
        printController.presentAnimated(true, completionHandler: nil)
    }


    override func viewDidLoad() {
        super.viewDidLoad()

        let reportString: String = "Property Owner: John Smith\n\nProperty ID: Main Street Residence\n\nReviewed By: Joe Schmoe\n\nNotes: These are some notes.\n\n"

        summaryReport.text = reportString
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

除了所有功能都打印在一行上，而不是保留我准备的字符串中包含的\ n换行符之外，打印功能可以正常工作.

The print function works just fine, except for the fact that it all prints out on one single line, rather than preserving the \n newline characters that I have included in my prepared string.

万一有人想知道，我尝试将结果显示到NSLog中，并且当我这样做时，将换行符保留在那里.只有当我发送到打印机时，它们才会被删除.

In case anybody is wondering, I have tried displaying the results into NSLog, and when I do, the line breaks ARE preserved there. Only when I send to a printer do they get removed.

任何帮助将不胜感激.

提前谢谢！

推荐答案

要解决此问题，我只是做了一个字符串函数，将所有换行符( \ n )替换为HTML换行符(< br/> )

To solve this issue, I simply did a string function that replaced any newline character (\n) to an HTML line break (<br/>)

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