如何在iOS 4.2中打印？

Question

我想将打印功能集成到我的应用程序中。

我要打印的文档为 .doc 或 .txt 格式。 我对iPhone开发还不是很有经验，所以发现按照Apple文档来实现它很困难。

如果有人可以通过发布一些示例代码来帮助我，那将是一个很大的帮助。

Answer 1

查看iOS 绘图和打印指南 -- 我链接到打印部分。那里有示例代码和指向更多示例代码的良好链接。

编辑：我现在看到您表示您发现文档难以理解。

Word 文档很复杂——您需要解析数据，这是相当困难的。

文本和 HTML 更容易。我采用了 Apple 的 HTML 示例，并将其更改为纯文本：

- (IBAction)printContent:(id)sender {
    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
    pic.delegate = self;

    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = self.documentName;
    pic.printInfo = printInfo;

    UISimpleTextPrintFormatter *textFormatter = [[UISimpleTextPrintFormatter alloc]
                                                 initWithText:yourNSStringWithContextOfTextFileHere];
    textFormatter.startPage = 0;
    textFormatter.contentInsets = UIEdgeInsetsMake(72.0, 72.0, 72.0, 72.0); // 1 inch margins
    textFormatter.maximumContentWidth = 6 * 72.0;
    pic.printFormatter = textFormatter;
    [textFormatter release];
    pic.showsPageRange = YES;

    void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =
    ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
        if (!completed && error) {
            NSLog(@"Printing could not complete because of error: %@", error);
        }
    };
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        [pic presentFromBarButtonItem:sender animated:YES completionHandler:completionHandler];
    } else {
        [pic presentAnimated:YES completionHandler:completionHandler];
    }
}

Answer 2

首先添加UIPrintInteractionControllerDelegate并创建变量

    UIPrintInteractionController *printController;

下面的代码打印所有图像，文档，excel，powerpoint，pdf文件对我有用：

[self printItem:SomeData withFilePath:YourFilePath];

在上面的代码中，您提供您的NSData文档/图像和 URL (filePath) 以及下面的 printItem:withFilePath: 方法的进一步代码

-(void)printItem :(NSData*)data withFilePath:(NSString*)filePath{
printController = [UIPrintInteractionController sharedPrintController];
printController.delegate = self;

UIPrintInfo *printInfo = [UIPrintInfo printInfo];
printInfo.outputType = UIPrintInfoOutputGeneral;
printInfo.jobName = [NSString stringWithFormat:@""];
printInfo.duplex = UIPrintInfoDuplexLongEdge;
printController.printInfo = printInfo;
printController.showsPageRange = YES;


//If NSData contains data of image/PDF
if(printController && [UIPrintInteractionController canPrintData:data]) {
    printController.printingItem = data;

}else{
    UIWebView* webView = [UIWebView new];
    printInfo.jobName = webView.request.URL.absoluteString;
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:filePath]]];

    printController.printFormatter = webView.viewPrintFormatter;

}

    void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
        if (!completed && error) {
            //NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);
        }
    };

    // Check wether device is iPad/iPhone , because UIPrintInteractionControllerDelegate has different methods for both devices
    if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
        [printController presentFromRect:self.view.frame inView:self.view animated:YES completionHandler:completionHandler];
    }
    else {
        [printController presentAnimated:YES completionHandler:completionHandler];
    }
}

我希望它会有所帮助。谢谢

// 对于 Swift，如果你只想打印图像
首先为图像创建 IBoutlet

@IBOutlet var qrImage : UIImageView?

，然后单击打印按钮，只需添加以下代码

//In your view controller
@IBAction func printButton(sender: AnyObject) {

    let printInfo = UIPrintInfo(dictionary:nil)
    printInfo.outputType = UIPrintInfoOutputType.general
    printInfo.jobName = "My Print Job"

    // Set up print controller
    let printController = UIPrintInteractionController.shared
    printController.printInfo = printInfo

    // Assign a UIImage version of my UIView as a printing iten
    printController.printingItem = self.qrImage?.image

    // Do it
    printController.present(from: self.view.frame, in: self.view, animated: true, completionHandler: nil)
}

Answer 3

您好，这可能会帮助您尝试一下，如果有任何疑问，请发布。

-(IBAction)printFromIphone:(id)sender {

    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
    pic.delegate = self;

    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = self.documentName;
    pic.printInfo = printInfo;

    UISimpleTextPrintFormatter *textFormatter = [[UISimpleTextPrintFormatter alloc]
                                                 initWithText:yourNSStringWithContextOfTextFileHere];
    textFormatter.startPage = 0;
    textFormatter.contentInsets = UIEdgeInsetsMake(72.0, 72.0, 72.0, 72.0); // 1 inch margins
    textFormatter.maximumContentWidth = 6 * 72.0;
    pic.printFormatter = textFormatter;
    [textFormatter release];
    pic.showsPageRange = YES;

    void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =
    ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
        if (!completed && error) {
            NSLog(@"Printing could not complete because of error: %@", error);
        }
    };
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        [pic presentFromBarButtonItem:sender animated:YES completionHandler:completionHandler];
    } else {
        [pic presentAnimated:YES completionHandler:completionHandler];
    }
}