从视图生成 PDF 以发送电子邮件 [英] Generate a PDF from a view for emailing

问题描述

我是 Objective C 的新手，所以请帮帮我.

I'm super new to Objective C, so please help me out.

我有一个包含多个标签和文本视图的视图.我正在尝试为该页面/视图生成一个 PDF 文件并附加到电子邮件中.

I have a view with several labels and text views. I am trying to generate a PDF file for that page/view and attach to an email.

首先，我尝试了这种方法，但似乎文件未创建或未附加到电子邮件中.这是我的代码:

First, I tried this approach and it seems either the file is not created or not attached to the email. Here are my codes:

NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, self.view.bounds, nil);
UIGraphicsBeginPDFPage();

[self.view drawRect:self.view.bounds];

UIGraphicsEndPDFContext();

MFMailComposeViewController *mailComposer = [[[MFMailComposeViewController alloc] init] autorelease];
mailComposer.mailComposeDelegate = self;



[pdfData writeToFile:file atomically:YES];



[mailComposer addAttachmentData:pdfData mimeType:@"application/pdf" fileName:file];

[self presentModalViewController:mailComposer animated:YES];

由于这不起作用，我尝试了另一种方法，先单独创建 PDF，然后将其附加到电子邮件中.然后我看到在那个目录下创建了PDF文件，但是是空的！！！

And since that didn't work, I tried a different approach by creating the PDF separately first, then attach it to the email. Then I saw that the PDF file is created at that directory, but it is empty!!!

这是我修改后的代码:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *file = [documentsDirectory stringByAppendingFormat:@"/tempFile.pdf"];

UIGraphicsBeginPDFContextToFile(file, self.view.bounds, nil);
UIGraphicsBeginPDFPage();

[self.view drawRect:self.view.bounds];

UIGraphicsEndPDFContext();

MFMailComposeViewController *mailComposer = [[[MFMailComposeViewController alloc] init] autorelease];
mailComposer.mailComposeDelegate = self;



[pdfData writeToFile:file atomically:YES];



[mailComposer addAttachmentData:pdfData mimeType:@"application/pdf" fileName:file];


[self presentModalViewController:mailComposer animated:YES];

• 能否请您帮助我从视图成功创建 PDF，然后将其附加到电子邮件中?

我尝试了多种方法，但无法弄清楚我做错了什么.非常感谢！！！

I have tried several ways but can't figure out what I am doing wrong. Thanks so much!!!

推荐答案

NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, self.view.bounds, nil);
UIGraphicsBeginPDFPage();

[self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; 

UIGraphicsEndPDFContext();

MFMailComposeViewController *mailComposer = [[[MFMailComposeViewController alloc] init] autorelease];

mailComposer.mailComposeDelegate = self;

[mailComposer addAttachmentData:pdfData mimeType:@"pdf" fileName:@"file.pdf"];

[self presentModalViewController:mailComposer animated:YES];

注意:不知道 draw rect 适用于视图.对我来说它不起作用！不需要往文件里写数据，直接写邮件就可以了

Note : Don't know the draw rect works for views.For me its not working! No need to write data into a file.you can directly do it while the mail is composed as

[mailComposer addAttachmentData:pdfData mimeType:@"pdf" fileName:@"file.pdf"];

试试这个.mime 类型只需要字符串 pdf.还包括文件名 file.pdf 的扩展名.

try this .The mime type requires only the string pdf.Also include the extension to the file name file.pdf.

快乐编码:)

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