需要渲染UITextView的全部内容以PDF

Question

我有以下方法工作在我的@implementation的UIView（SaveToPdf）类精细

- (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; 
} 

我用这个方法来打印我的观点，以PDF和它工作得很好，除了一个问题。我的视图包含一个UITextView，而pdf仅打印该UITextView的可见区域。我需要PDF来呈现完整的内容（即可滚动文字）

我是iOS开发新手，如果有人能请我指出正确的方向，我将不胜感激。有一点需要注意，我还需要在UIView中打印其他子视图（标签，文本框等），并将其打印到该PDF中。这目前工作正常，布局保存在我的PDF只需使用[self.layer renderInContext：pdfContext];由于主视图将循环遍历所有的子视图..

谢谢

Answer 1

我知道的方法2 -

1. 我已经看到了一些代码，其中[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];正在做。当我尝试时，我看到它导致我松散的文本清晰。所以我不能使用这种方法。
2. 这是比较传统的方法。即您提取文本并绘制​​它。这段代码非常坚固，并且已经看到了一些用法。所以你需要做的就是从你的uitextview获得所有文本并将它传递到这里...

希望这有助于。

#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

我已经写了这段代码从UIView内容生成pdf。 愿这能帮助你。

#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]; 

} 

Answer 3

如果你罚款绘制尽可能多的文本页面上的适合和你有从你的UITextView是在PDF切断与文字的烦恼，要禁用的UITextView的滚动。无论是在Interface Builder或以编程方式：

textview.scrollEnabled = NO; 

当scrollEnabled设置为YES，文本得到了我的PDF切断。如果没有滚动，我会得到整个文本 - 无论如何至少可以放在一页上。

如果您需要在多个页面上生成文本，我认为您必须求助于将您的元素逐个绘制到PDF绘图上下文中，如其他答案所示。