Question

我有以下方法在我的@implementation UIView（SaveToPdf）类中正常工作

- (NSData *) toPdfData
{
// Creates a mutable data object for updating with binary data, like a byte array
NSMutableData *pdfData = [NSMutableData data];

// Points the pdf converter to the mutable data object and to the UIView to be converted
UIGraphicsBeginPDFContextToData(pdfData, self.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();


// draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
[self.layer renderInContext:pdfContext];

// remove PDF rendering context
UIGraphicsEndPDFContext();

return pdfData;
}

我使用此方法将我的视图打印为PDF，除了一个问题外它工作正常。我的视图包含一个UITextView，而pdf只打印该UITextView的可见区域。我需要PDF来呈现完整的内容（即可滚动的文本）

我是iOS开发的新手，如果有人能指出我正确的方向，我将不胜感激。

*有一点需要注意，我在UIView中有其他子视图（标签，文本字段等），也需要打印到该PDF。这个目前工作正常，只需使用[self.layer renderInContext：pdfContext]就可以在我的PDF中保留布局;因为主视图将遍历它的所有子视图..

谢谢

Answer 1

我知道两种方法 -

我看到了[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];正在进行的一些代码。当我尝试时，我看到它导致我放松文字清晰度。所以我不能使用这种方法。
这是更传统的方法。即你提取文字并绘制它。这段代码坚如磐石，已经看到了一些用法。因此，您需要做的就是从uitextview获取所有文本并将其传递到此处...

希望这有帮助。

#define kBorderInset 25.0
#define kMarginInset 15.0

- (void) drawText
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0);

NSString *textToDraw = @"YOUR TEXT FROM UITEXTVIEW HERE";
UIFont *font = [UIFont systemFontOfSize:16.0];

CGSize stringSize = [textToDraw sizeWithFont:font
                           constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset) 
                               lineBreakMode:UILineBreakModeWordWrap];

CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset + 350.0, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height);

[textToDraw drawInRect:renderingRect 
              withFont:font
         lineBreakMode:UILineBreakModeWordWrap
             alignment:UITextAlignmentLeft];
return;
}

Answer 2

如果您可以在页面上绘制尽可能多的文本，并且您在UITextView中的文本被截断时遇到麻烦，则需要禁用UITextView的滚动。在Interface Builder中或以编程方式：

textview.scrollEnabled = NO;

当scrollEnabled设置为YES时，文本在我的PDF中被截断。在没有滚动的情况下，我得到了整个文本 - 至少在一页上都适合。

如果您需要在多个页面上生成文本，我认为您必须依靠其他答案显示单独绘制元素到PDF绘图上下文。

Answer 3

我已编写此代码以从UIView内容生成pdf。愿这对你有帮助。

#define kBorderInset            20.0
#define kBorderWidth            1.0
#define kMarginInset            10.0

//Line drawing
#define kLineWidth              1.0

    - (IBAction)generatePdfButtonPressed
{
 pageSize = CGSizeMake(612, 792);
 NSString *fileName = @"profileInfo.pdf";
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *pdfFileName = [documentsDirectory stringByAppendingPathComponent:fileName];

 [self generatePdfWithFilePath:pdfFileName];
}

- (void) generatePdfWithFilePath: (NSString *)thefilePath
{
 UIGraphicsBeginPDFContextToFile(thefilePath, CGRectZero, nil);

 NSInteger currentPage = 0;
 BOOL done = NO;
 do
 {
  // Mark the beginning of a new page.
  UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil);

  // Draw a page number at the bottom of each page.
  currentPage++;
  [self drawPageNumber:currentPage];

  //Draw a border for each page.
  [self drawBorder];

  //Draw text fo our header.
  [self drawHeader];

  //Draw a line below the header.
  [self drawLine];

  //Draw some text for the page.
  if (profileInfo!=nil) 
  {
   NSString *stringwithInfo=[NSString stringWithFormat:@"Headline: %@\nFirstname: %@\nLastName : %@\nSiteStandardProfileRequest:\n%@",[profileInfo valueForKey:@"headline"],[profileInfo valueForKey:@"firstName"],[profileInfo valueForKey:@"lastName"],[[profileInfo valueForKey:@"siteStandardProfileRequest"]valueForKey:@"url"]];


   [self drawText:stringwithInfo];
  }

  //Draw an image
  [self drawImage];
  done = YES;
 }
 while (!done);

 // Close the PDF context and write the contents out.
 UIGraphicsEndPDFContext();
}

- (void) drawBorder
{
 CGContextRef    currentContext = UIGraphicsGetCurrentContext();
 UIColor *borderColor = [UIColor brownColor];
 CGRect rectFrame = CGRectMake(kBorderInset, kBorderInset, pageSize.width-kBorderInset*2, pageSize.height-kBorderInset*2);
 CGContextSetStrokeColorWithColor(currentContext, borderColor.CGColor);
 CGContextSetLineWidth(currentContext, kBorderWidth);
 CGContextStrokeRect(currentContext, rectFrame);
}


- (void) drawLine
{
 CGContextRef    currentContext = UIGraphicsGetCurrentContext();

 CGContextSetLineWidth(currentContext, kLineWidth);

 CGContextSetStrokeColorWithColor(currentContext, [UIColor blueColor].CGColor);

 CGPoint startPoint = CGPointMake(kMarginInset + kBorderInset, kMarginInset + kBorderInset + 40.0);
 CGPoint endPoint = CGPointMake(pageSize.width - 2*kMarginInset -2*kBorderInset, kMarginInset + kBorderInset + 40.0);

 CGContextBeginPath(currentContext);
 CGContextMoveToPoint(currentContext, startPoint.x, startPoint.y);
 CGContextAddLineToPoint(currentContext, endPoint.x, endPoint.y);

 CGContextClosePath(currentContext);
 CGContextDrawPath(currentContext, kCGPathFillStroke);
}


- (void) drawText:(NSString*)txtTodraw
{
 CGContextRef    currentContext = UIGraphicsGetCurrentContext();
 CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0);

 UIFont *font = [UIFont systemFontOfSize:14.0];

 CGSize stringSize = [txtTodraw sizeWithFont:font
                            constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset)
                                lineBreakMode:UILineBreakModeWordWrap];

 CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset + 50.0, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height);

 [txtTodraw drawInRect:renderingRect
               withFont:font
          lineBreakMode:UILineBreakModeWordWrap
              alignment:UITextAlignmentLeft];
}


- (void) drawImage
{
 UIImage * demoImage = [UIImage imageNamed:@"demo.png"];
 [demoImage drawInRect:CGRectMake( (pageSize.width - demoImage.size.width/2)/2, 350, demoImage.size.width/2, demoImage.size.height/2)];
}


- (void) drawHeader
{
 CGContextRef    currentContext = UIGraphicsGetCurrentContext();
 CGContextSetRGBFillColor(currentContext, 0.3, 0.7, 0.2, 1.0);

 NSString *textToDraw = @"LinkedIn Profile Info";

 UIFont *font = [UIFont systemFontOfSize:24.0];

 CGSize stringSize = [textToDraw sizeWithFont:font constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset) lineBreakMode:UILineBreakModeWordWrap];

 CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height);

 [textToDraw drawInRect:renderingRect withFont:font lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentLeft];
}


- (void)drawPageNumber:(NSInteger)pageNumber
{
 NSString* pageNumberString = [NSString stringWithFormat:@"Page %d", pageNumber];
 UIFont* theFont = [UIFont systemFontOfSize:12];

 CGSize pageNumberStringSize = [pageNumberString sizeWithFont:theFont
                                            constrainedToSize:pageSize
                                                lineBreakMode:UILineBreakModeWordWrap];

 CGRect stringRenderingRect = CGRectMake(kBorderInset,
                                         pageSize.height - 40.0,
                                         pageSize.width - 2*kBorderInset,
                                         pageNumberStringSize.height);

 [pageNumberString drawInRect:stringRenderingRect withFont:theFont lineBreakMode:UILineBreakModeWordWrap alignment:UITextAlignmentCenter];
}

-(void)fillInformationInform:(NSDictionary*)dics
{
 headLineLabel.text=[dics valueForKey:@"headline"];
 NSURL *picUrl=[NSURL URLWithString:[dics valueForKey:@"pictureUrl"]];
 profileImageView.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:picUrl]];

 phoneNoLabel.text=[[[[dics valueForKey:@"phoneNumbers"] valueForKey:@"values"] objectAtIndex:0] valueForKey:@"phoneNumber"];

 cityLabel.text=[[dics valueForKey:@"location"] valueForKey:@"name"];
 emailAddressLabel.text=[dics valueForKey:@"emailAddress"];
 nameLabel.text=[NSString stringWithFormat:@"%@ %@",[dics valueForKey:@"firstName"],[dics valueForKey:@"lastName"]];

 dateOfBirthLabel.text=[NSString stringWithFormat:@"%@-%@-%@",[[dics valueForKey:@"dateOfBirth"]valueForKey:@"day"],[[dics valueForKey:@"dateOfBirth"]valueForKey:@"month"],[[dics valueForKey:@"dateOfBirth"]valueForKey:@"year"]];

 NSDictionary *eduDic=[[NSDictionary alloc] initWithDictionary:[[[dics valueForKey:@"educations"]valueForKey:@"values"]objectAtIndex:0]];

// NSLog(@"education dic is %@",eduDic);

 degreeLabel.text=[eduDic valueForKey:@"degree"];
 durationLabel.text=[NSString stringWithFormat:@"From %@ To %@",[[eduDic valueForKey:@"startDate"]valueForKey:@"year"],[[eduDic valueForKey:@"endDate"]valueForKey:@"year"]];
 fieldOfStudyLabel.text=[eduDic valueForKey:@"fieldOfStudy"];
 collegeLabel.text=[eduDic valueForKey:@"schoolName"];


 destinationLabel.text=[[[[dics valueForKey:@"positions"] valueForKey:@"values"] objectAtIndex:0] valueForKey:@"title"];

 NSArray *skillsArray=[[NSArray alloc] initWithArray:[[dics valueForKey:@"skills"]valueForKey:@"values"]];


 NSString *skillStr=[[NSString alloc] initWithFormat:@""];

 for (NSDictionary *skillDic in skillsArray) 
 {
  if (![skillStr isEqualToString:@""]) {
   skillStr=[skillStr stringByAppendingFormat:@","];
  }
  skillStr=[skillStr stringByAppendingFormat:@"%@",[[skillDic valueForKey:@"skill"]valueForKey:@"name"]];
 }

 NSLog(@"skill string is %@",skillStr);

 skillsLable.text=[NSString stringWithFormat:@"%@",skillStr];

}

需要将UITextView完整内容呈现为PDF

3 个答案: