我在Objective-C(使用可可)中编写一个应用程序.我有一个PDF模板,我需要将实际值替换为PDF中的占位符,然后将结果保存到新的PDF中.
我该怎么做？我应该使用哪个库？
解决方法
我找到了解决方案！它连接了quartz2d的功能和UIGraphics的简单性.
Nsstring *newFilePath = @"path/to/your/newfile.pdf";
Nsstring *templatePath = @"path/to/your/template.pdf";
//create empty pdf file;
UIGraphicsBeginPDFContextToFile(newFilePath,CGRectMake(0,792,612),nil);
CFURLRef url = CFURLCreateWithFileSystemPath (NULL,(CFStringRef)templatePath,kcfURLPOSIXPathStyle,0);
//open template file
CGPDFDocumentRef templateDocument = CGPDFDocumentCreateWithURL(url);
CFRelease(url);
//get amount of pages in template
size_t count = CGPDFDocumentGetNumberOfPages(templateDocument);
//for each page in template
for (size_t pageNumber = 1; pageNumber <= count; pageNumber++) {
//get bounds of template page
CGpdfpageRef templatePage = CGPDFDocumentGetPage(templateDocument,pageNumber);
CGRect templatePageBounds = CGpdfpageGetBoxRect(templatePage,kCGPDFCropBox);
//create empty page with corresponding bounds in new document
UIGraphicsBeginpdfpageWithInfo(templatePageBounds,nil);
CGContextRef context = UIGraphicsGetCurrentContext();
//flip context due to different origins
CGContextTranslateCTM(context,0.0,templatePageBounds.size.height);
CGContextScaleCTM(context,1.0,-1.0);
//copy content of template page on the corresponding page in new file
CGContextDrawpdfpage(context,templatePage);
//flip context back
CGContextTranslateCTM(context,-1.0);
/* Here you can do any drawings */
[@"Test" drawAtPoint:CGPointMake(200,300) withFont:[UIFont systemFontOfSize:20]];
}
CGPDFDocumentRelease(templateDocument);
UIGraphicsEndPDFContext();