如何从uiwebview中保存目标c中的pdf
问题描述:
我想在应用程序中将pdf保存为UIWebView中的ibook,UIWebView中的html可以是多页。
我尝试使用如何从uiwebview中保存目标c中的pdf
NSString *page = [self.lowWebview stringByEvaluatingJavaScriptFromString:@"document.body.outerHTML"];
NSString *path = [self exportHTMLContentToPDF:page];
NSURL *targetURL = [NSURL fileURLWithPath:path];
self.docController = [UIDocumentInteractionController interactionControllerWithURL:targetURL];
if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"itms-books:"]])
{
[self.docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
NSLog(@"iBooks installed");
} else {
NSLog(@"iBooks not installed");
}
exportHTMLContentToPDF:
CustomPrintPageRenderer *printPageRenderer = [[CustomPrintPageRenderer alloc] init];
UIMarkupTextPrintFormatter *printFormatter = [[UIMarkupTextPrintFormatter alloc] initWithMarkupText:HTMLContent];
[printPageRenderer addPrintFormatter:printFormatter startingAtPageAtIndex:0];//.addPrintFormatter(printFormatter, startingAtPageAtIndex: 0)
NSData *pdfData = [self drawPDFUsingPrintPageRenderer:printPageRenderer];
NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *fileName = [docDirPath stringByAppendingPathComponent:@"ticket.pdf"];
[pdfData writeToFile:fileName atomically:true];//.writeToFile(fileName, atomically: true)
NSLog(@"%@", fileName);
return fileName;
问题是exportHTMLContentToPDF只创建一个页面,如果UIWebView中包含多个页面,并在一段时间的输出格式不能很好地在PDF
打印在此先感谢。
答
从UIWebView中加载的任何微软文档创建PDF
#define kPaperSizeA4 CGSizeMake(595.2,841.8)
首先实现UIPrintPageRenderer协议
@interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
@end
@implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, self.paperRect, nil);
[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
CGRect bounds = UIGraphicsGetPDFContextBounds();
for (int i = 0 ; i < self.numberOfPages ; i++)
{
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}
@end
然后,拨打以下方法文档完成了UIWebView
-(void)createPDF:(UIWebView *)webView {
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:webView.viewPrintFormatter startingAtPageAtIndex:0];
float padding = 10.0f;
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
CGRect printableRect = CGRectMake(padding, padding, kPaperSizeA4.width-(padding * 2), kPaperSizeA4.height-(padding * 2));
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:@"paperRect"];
[render setValue:[NSValue valueWithCGRect:printableRect] forKey:@"printableRect"];
NSData *pdfData = [render printToPDF];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (pdfData) {
[pdfData writeToFile:directoryPath atomically: YES];
}
else
{
NSLog(@"PDF couldnot be created");
}
});}
样之后,
摘自PDF Creation in iOS - Create PDF from any Microsoft Document loaded in UIWebview。原作者为Mansi Panchal。您可以在contributor page上找到署名详情。信息来源根据CC BY-SA 3.0获得许可,可在Documentation archive中找到。参考主题ID:2416和实例ID:28437.
应用程序在此行中挂“[自我prepareForDrawingPages:NSMakeRange(0,self.numberOfPages) ];”并没有错误或崩溃在xcode显示,只是挂 –
尝试注释掉该行并运行代码。 –