UIDocumentInteractionController文

NSString *urlStr = [[NSBundle mainBundle] pathForResource:@"iOS开发指南.pdf" ofType:nil];
NSURL *url = [NSURL fileURLWithPath:urlStr];

UIDocumentInteractionController *documentVc = [UIDocumentInteractionController interactionControllerWithURL:url];
documentVc.delegate = self;

[documentVc presentPreviewAnimated:YES];

UIDocumentInteractionController 代理方法

• (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{
  return self;
  }

• (UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller{
  return self.view;
  }

• (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller{
  return self.view.bounds;
  }