通过 Go SDK 向 PDF 添加文本注释

    package main

    import (
        "fmt"

        asposepdfcloud "github.com/aspose-pdf-cloud/aspose-pdf-cloud-go/v25"
    )

    func AppendTextAnnotation(pdf_api *asposepdfcloud.PdfApiService, document_name string, page_num int32, output_document string, prefix string, remote_folder string) {
        // Append a new free text annotation to the PDF document.
        UploadFile(pdf_api, document_name)
        args := map[string]interface{}{
            "folder": remote_folder,
        }

        text_style := asposepdfcloud.TextStyle{
            FontSize:        20,
            Font:            "Arial",
            ForegroundColor: &asposepdfcloud.Color{A: 0xFF, R: 0x00, G: 0xFF, B: 0x00},
            BackgroundColor: &asposepdfcloud.Color{A: 0xFF, R: 0xFF, G: 0x00, B: 0x00},
        }

        new_annotation := asposepdfcloud.FreeTextAnnotation{
            Rect:                &asposepdfcloud.Rectangle{LLX: 100, LLY: 350, URX: 450, URY: 400},
            TextStyle:           &text_style,
            Name:                "Free Text Annotation",
            Flags:               []asposepdfcloud.AnnotationFlags{asposepdfcloud.AnnotationFlagsDefault},
            HorizontalAlignment: asposepdfcloud.HorizontalAlignmentCenter,
            Intent:              asposepdfcloud.FreeTextIntentFreeTextTypeWriter,
            RichText:            NEW_FT_ANNOTATION_TEXT,
            Subject:             NEW_FT_ANNOTATION_SUBJECT,
            Contents:            NEW_FT_ANNOTATION_CONTENTS,
            Title:               NEW_FT_ANNOTATION_DESCRIPTION,
            ZIndex:              1,
            Justification:       asposepdfcloud.JustificationCenter,
        }

        _, httpResponse, err := pdf_api.PostPageFreeTextAnnotations(document_name, page_num, []asposepdfcloud.FreeTextAnnotation{new_annotation}, args)
        if err != nil {
            fmt.Println(err.Error())
        } else if httpResponse.StatusCode < 200 || httpResponse.StatusCode > 299 {
            fmt.Println("AppendTextAnnotation(): Failed to append annotation to the document page.")
        } else {
            fmt.Println("AppendTextAnnotation(): annotation '" + NEW_FT_ANNOTATION_TEXT + "' added to the document '" + document_name + "'.")
            DownloadFile(pdf_api, document_name, output_document, prefix)
        }
    }