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标题: ios - 如何将webview内容创建为pdf文件ios sdk [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-12 12:04
标题: ios - 如何将webview内容创建为pdf文件ios sdk

这个问题在这里已经有了答案:

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Best Answer-推荐答案

使用 UIWebView 中的 UIPrintPageRenderer 执行以下步骤:

添加UIPrintPageRenderer的Category获取PDF数据

@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

为 A4 尺寸添加这些定义

#define kPaperSizeA4 CGSizeMake(595.2,841.8)

现在在 UIWebView's webViewDidFinishLoad delegate 使用 UIPrintPageRenderer property 的 UIWebView.

- (void)webViewDidFinishLoadUIWebView *)awebView
{
  if (awebView.isLoading)
    return;

  UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
  [render addPrintFormatter:awebView.viewPrintFormatter startingAtPageAtIndex:0];
  //increase these values according to your requirement
  float topPadding = 10.0f;
  float bottomPadding = 10.0f;
  float leftPadding = 10.0f;
  float rightPadding = 10.0f;
  CGRect printableRect = CGRectMake(leftPadding,
                                  topPadding,
                                  kPaperSizeA4.width-leftPadding-rightPadding,
                                  kPaperSizeA4.height-topPadding-bottomPadding);
  CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
  [render setValue:[NSValue valueWithCGRect:paperRect] forKey"paperRect"];
  [render setValue:[NSValue valueWithCGRect:printableRect] forKey"printableRect"];
  NSData *pdfData = [render printToPDF];
  if (pdfData) {
    [pdfData writeToFile:[NSString stringWithFormat"%@/tmp.pdf",NSTemporaryDirectory()] atomically: YES];
  }
  else
  {
    NSLog(@"DF couldnot be created");
  }
}

关于ios - 如何将webview内容创建为pdf文件ios sdk，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26272717/

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