Add Annotations to PDF ​

// Init Methods
- (instancetype)initWithDocument:(CPDFDocument *)document {
  CPDFDocument *myDocument = document;
  [self createTestAnnots:myDocument];
}

// Create all type annotation using API
- (void)createTestAnnots:(CPDFDocument *)oldDocument {
  NSString *commandLineStr = @"" 
  
  // Get Sandbox path for saving the PDFFile
  NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
  NSString *writeDirectoryPath = [NSString stringWithFormat:@"%@/%@", path, @"Annoation"];

  if (![[NSFileManager defaultManager] fileExistsAtPath:writeDirectoryPath])
      [[NSFileManager defaultManager] createDirectoryAtURL:[NSURL fileURLWithPath:writeDirectoryPath] withIntermediateDirectories:YES attributes:nil error:nil];
  NSString *writeFilePath = [NSString stringWithFormat:@"%@/%@.pdf",writeDirectoryPath,@"CreateAnnotationTest"];

  // Save the document in the test PDF file
  NSURL *anntationURL = [NSURL fileURLWithPath:writeFilePath];
  [oldDocument writeToURL:anntationURL];

  // Create a new document for test PDF file
  CPDFDocument *document = [[CPDFDocument alloc] initWithURL:anntationURL];

  //-----------------------------------------------------------------------------------------
  // Test of a free text annotation and ink annotation.
  CPDFPage *page1 = [document pageAtIndex:0];

  {
      //  Create a freetext annotation
      CPDFFreeTextAnnotation *freeText1 = [[CPDFFreeTextAnnotation alloc] initWithDocument:document];
      freeText1.contents = @"\n\nSome swift brown fox snatched a gray hare out of the air by freezing it with an angry glare."
      "\n\nAha!\n\nAnd there was much rejoicing!";
      freeText1.bounds = CGRectMake(10, 200, 160, 570);
      freeText1.font = [UIFont fontWithName:@"Helvetica" size:12];
      freeText1.fontColor = [UIColor redColor];
      freeText1.alignment = NSTextAlignmentLeft;
      //  add a freetext annotation for page
      [page1 addAnnotation:freeText1];
  }

  {
      // Create a ink annotation
      CPDFInkAnnotation *ink = [[CPDFInkAnnotation alloc] initWithDocument:document];
      CGPoint startPoint = CGPointMake(220, 505);
      CGPoint point1 = CGPointMake(100, 490);
      CGPoint point2 = CGPointMake(120, 410);
      CGPoint point3 = CGPointMake(100, 400);
      CGPoint point4 = CGPointMake(180, 490);
      CGPoint endPoint = CGPointMake(140, 440);
      ink.color = [UIColor redColor];
      ink.opacity = 0.5;
      ink.borderWidth = 2.0;
      ink.paths = @[@[[NSValue valueWithCGPoint:startPoint],[NSValue valueWithCGPoint:point1],[NSValue valueWithCGPoint:point2],[NSValue valueWithCGPoint:point3],[NSValue valueWithCGPoint:point4],[NSValue valueWithCGPoint:endPoint]]];
      [page1 addAnnotation:ink];
  }

  //-----------------------------------------------------------------------------------------
  // Test of line annotaiton
  // Set line with and Dotted line
  CPDFBorder *border1 = [[CPDFBorder alloc] initWithStyle:CPDFBorderStyleDashed
                                                  lineWidth:1
                                                dashPattern:@[@(2), @(1)]];
  CPDFBorder *border2 = [[CPDFBorder alloc] initWithStyle:CPDFBorderStyleDashed
                                                  lineWidth:1
                                                dashPattern:@[@(2), @(0)]];
  CPDFPage *page2 = [document pageAtIndex:1];
  {
      // Create a Line annotations.
      CPDFLineAnnotation *line1 = [[CPDFLineAnnotation alloc] initWithDocument:document];
      line1.startPoint = CGPointMake(350, 270);
      line1.endPoint = CGPointMake(260, 370);
      line1.startLineStyle = CPDFLineStyleSquare;
      line1.endLineStyle = CPDFLineStyleCircle;
      line1.color = [UIColor redColor];
      line1.interiorColor = [UIColor yellowColor];
      line1.opacity = 0.5;
      line1.interiorOpacity = 0.5;
      line1.border = border1;
      [line1 setContents:@"Dashed Captioned"];
      [page2 addAnnotation:line1];
  }

  {
      CPDFLineAnnotation *line2 = [[CPDFLineAnnotation alloc] initWithDocument:document];
      line2.startPoint = CGPointMake(385, 480);
      line2.endPoint = CGPointMake(540, 555);
      line2.startLineStyle = CPDFLineStyleCircle;
      line2.endLineStyle = CPDFLineStyleOpenArrow;
      line2.color = [UIColor redColor];
      line2.interiorColor = [UIColor yellowColor];
      line2.opacity = 0.5;
      line2.interiorOpacity = 0.5;
      line2.border = border2;
      [line2 setContents:@"Inline Caption"];
      [page2 addAnnotation:line2];
  }

  {
      CPDFLineAnnotation *line3 = [[CPDFLineAnnotation alloc] initWithDocument:document];
      line3.startPoint = CGPointMake(25, 426);
      line3.endPoint = CGPointMake(180, 555);
      line3.startLineStyle = CPDFLineStyleCircle;
      line3.endLineStyle = CPDFLineStyleSquare;
      line3.color = [UIColor greenColor];
      line3.interiorColor = [UIColor yellowColor];
      line3.opacity = 0.5;
      line3.interiorOpacity = 0.5;
      line3.border = border2;
      [line3 setContents:@"Offset Caption"];
      [page2 addAnnotation:line3];
  }

  //-----------------------------------------------------------------------------------------
  // Test of circle and square annotation
  CPDFPage *page3 = [document pageAtIndex:2];
  {
      // Create a circle annotations.
      CPDFCircleAnnotation *circle1 = [[CPDFCircleAnnotation alloc] initWithDocument:document];
      circle1.bounds = CGRectMake(300, 300, 100, 100);
      circle1.color = [UIColor redColor];
      circle1.interiorColor = [UIColor yellowColor];
      circle1.opacity = 0.5;
      circle1.interiorOpacity = 0.5;
      circle1.border = border1;
      [page3 addAnnotation:circle1];
  }

  {
      CPDFCircleAnnotation *circle2 = [[CPDFCircleAnnotation alloc] initWithDocument:document];
      circle2.bounds = CGRectMake(100, 100, 200, 200);
      circle2.color = [UIColor greenColor];
      circle2.interiorColor = [UIColor purpleColor];
      circle2.opacity = 1.0;
      circle2.interiorOpacity = 1.0;
      circle2.border = border2;
      [page3 addAnnotation:circle2];
  }

  {
      // Create a sqaure annotations.
      CPDFSquareAnnotation *square1 = [[CPDFSquareAnnotation alloc] initWithDocument:document];
      square1.bounds = CGRectMake(10, 200, 80, 150);
      square1.color = [UIColor redColor];
      square1.interiorColor = [UIColor yellowColor];
      square1.opacity = 0.5;
      square1.interiorOpacity = 0.5;
      square1.border = border1;
      [page3 addAnnotation:square1];
  }

  {
      CPDFSquareAnnotation *square2 = [[CPDFSquareAnnotation alloc] initWithDocument:document];
      square2.bounds = CGRectMake(400, 200, 80, 300);
      square2.color = [UIColor greenColor];
      square2.interiorColor = [UIColor purpleColor];
      square2.opacity = 1.0;
      square2.interiorOpacity = 1.0;
      square2.border = border2;
      [page3 addAnnotation:square2];
  }

  //-----------------------------------------------------------------------------------------
  // Test of markup, note, link and sound anntation
  CPDFPage *page4 = [document pageAtIndex:3];
  {
      // Get array of search result
      NSArray *resultArray = [document findString:@"Page" withOptions:CPDFSearchCaseInsensitive];

      // Get the first page of search resultsGet the first page of search results
      NSArray *selections = [resultArray objectAtIndex:3];

      // Get the first search result on the first page
      CPDFSelection *selection = [selections objectAtIndex:0];

      NSMutableArray *quadrilateralPoints = [NSMutableArray array];

      CGRect bounds = selection.bounds;
      [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMaxY(bounds))]];
      [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))]];
      [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds))]];
      [quadrilateralPoints addObject:[NSValue valueWithCGPoint:CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds))]];


      // Create a highlight annotations.
      CPDFMarkupAnnotation *highlight = [[CPDFMarkupAnnotation alloc] initWithDocument:document markupType:CPDFMarkupTypeHighlight];
      highlight.color = [UIColor yellowColor];
      highlight.quadrilateralPoints = quadrilateralPoints;
      [page4 addAnnotation:highlight];
  }

  {
      // Create a note annotation
      CPDFTextAnnotation *text = [[CPDFTextAnnotation alloc] initWithDocument:document];
      text.contents = @"test";
      text.bounds = CGRectMake(50, 200, 50, 50);
      text.color = [UIColor yellowColor];
      [page4 addAnnotation:text];
  }

  {
      // Create a link annotation
      CPDFDestination *dest = [[CPDFDestination alloc] initWithDocument:document pageIndex:1];
      CPDFLinkAnnotation *link = [[CPDFLinkAnnotation alloc] initWithDocument:document];
      link.bounds = CGRectMake(50, 100, 50, 50);
      link.destination = dest; //    link.URL = @"https://www.";
      [page4 addAnnotation:link];
  }

  {
      // Create a sound annotation
      // need import a recording file
      NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Bird" ofType:@"wav"];
      CPDFSoundAnnotation *soundAnnotation = [[CPDFSoundAnnotation alloc] initWithDocument:document];
      if ([soundAnnotation setMediaPath:filePath]) {
          soundAnnotation.bounds = CGRectMake(100, 200, 50, 50);
          [page4 addAnnotation:soundAnnotation];
      }
  }

  //-----------------------------------------------------------------------------------------
  // Test of stamp annotation
  CPDFPage *page5 = [document pageAtIndex:4];
  CGSize size5 = [document pageSizeAtIndex:4];
  CGFloat height5 = size5.height;

  {
      // Create a all standard annotation
      for (int i = 1; i <= 23; i++) {
          CPDFStampAnnotation *standard = [[CPDFStampAnnotation alloc] initWithDocument:document type:i];
          standard.bounds = CGRectMake(50, height5 - i*30, 50, 30);
          [page5 addAnnotation:standard];
      }
  }

  {
      // Create a text stamp annotation
      NSTimeZone* timename = [NSTimeZone systemTimeZone];
      NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init ];
      [outputFormatter setTimeZone:timename ];

      // Get date
      NSString *tDate = nil;
      [outputFormatter setDateFormat:@"yyyy-MM-dd HH:mm:SS"];

      tDate = [outputFormatter stringFromDate:[NSDate date]];
      CPDFStampAnnotation *text = [[CPDFStampAnnotation alloc] initWithDocument:document text:@"ComPDFKit" detailText:tDate style:CPDFStampStyleRed shape:CPDFStampShapeArrowLeft];
      text.bounds = CGRectMake(150, height5-50, 80, 50);
      [page5 addAnnotation:text];
  }

  {
      // Create a text stamp annotation
      CPDFStampAnnotation *image = [[CPDFStampAnnotation alloc] initWithDocument:document image:[UIImage imageNamed:@"Logo"]];
      image.bounds = CGRectMake(150, height5-120, 50, 50);
      [page5 addAnnotation:image];
  }

  // Save the create annotation action in document
  [document writeToURL:anntationURL];
  commandLineStr = [commandLineStr stringByAppendingString:@"Done.\n"];
  commandLineStr = [commandLineStr stringByAppendingString:@"Done. Results saved in CreateAnnotationTest.pdf\n"];

  // Dele the first annotation
  [self deleteTestAnnot:document];
  
  // Print annotation list information
  [self printAnnotationList:document];
}

// Dele the first annotation
- (void)deleteTestAnnot:(CPDFDocument *)oldDocument {
  NSString *commandLineStr = @"" 
  
  // Get Sandbox path for saving the PDFFile
  NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
  NSString *writeDirectoryPath = [NSString stringWithFormat:@"%@/%@", path, @"Annoation"];

  if (![[NSFileManager defaultManager] fileExistsAtPath:writeDirectoryPath])
      [[NSFileManager defaultManager] createDirectoryAtURL:[NSURL fileURLWithPath:writeDirectoryPath] withIntermediateDirectories:YES attributes:nil error:nil];
  NSString *writeFilePath = [NSString stringWithFormat:@"%@/%@.pdf",writeDirectoryPath,@"DeleteAnnotationTest"];

  // Save the document in the PDF file
  NSURL *deleteAnntationURL = [NSURL fileURLWithPath:writeFilePath];
  [oldDocument writeToURL:deleteAnntationURL];

  // Create a new document for test PDF file
  CPDFDocument *document = [[CPDFDocument alloc] initWithURL:deleteAnntationURL];

  // Remove the fisrt annotation from document
  CPDFPage *page = [document pageAtIndex:0];

  CPDFAnnotation *annotation = [[page annotations] objectAtIndex:0];
  [page removeAnnotation:annotation];

  // Save the remove the fisrt annotation action in document
  [document writeToURL:deleteAnntationURL];
  commandLineStr = [commandLineStr stringByAppendingString:@"Done.\n"];
  commandLineStr = [commandLineStr stringByAppendingString:@"Done. Results saved in DeleteAnnotationTest.pdf\n"];
}

// Print annotation list information
- (void)printAnnotationList:(CPDFDocument *)document {
  NSString *commandLineStr = @"" 
  
  NSMutableArray *annotations = [NSMutableArray array];
    for (int i=0; i<document.pageCount; i++) {
        // Loop through all anntation
        CPDFPage *page = [document pageAtIndex:i];
        [annotations addObjectsFromArray:[page annotations]];
        for (CPDFAnnotation *annotation in annotations) {
            commandLineStr = [commandLineStr stringByAppendingString:@"-------------------------------------\n"];
            commandLineStr = [commandLineStr stringByAppendingFormat:@"Page: %d\n", i+1];
            commandLineStr = [commandLineStr stringByAppendingFormat:@"Annot Type: %@\n", annotation.type];
            commandLineStr = [commandLineStr stringByAppendingFormat:@"\tPosition: %d, %d, %d, %d\n\n", (int)annotation.bounds.origin.x,(int)annotation.bounds.origin.y, (int)annotation.bounds.size.width, (int)annotation.bounds.size.height];
        }
  }
}