ios – PDFKit交换注释内容

可以在PDFKit中更改FreeText注释的文本(即内容)而不删除注释/构建新注释吗？

在PDFView中查看时,以下代码段不会更改注释的内容：

let url = Bundle.main.url(forresource: "Test",withExtension: "pdf")!
let document = PDFDocument(url: url)!

for index in 0..<document.PageCount {
    let page: PDFPage = document.page(at: indeX)!
    let Annotations = page.Annotations
    for Annotation in Annotations {
        Annotation.contents = "[replaCED]"
    }
}
mainPDFView.document = document

这有效 – 但需要替换注释(因此必须复制注释的所有其他细节)：

let url = Bundle.main.url(forresource: "Test",withExtension: "pdf")!
let document = PDFDocument(url: url)!

for index in 0..<document.PageCount {
    let page: PDFPage = document.page(at: indeX)!
    let Annotations = page.Annotations
    for Annotation in Annotations {
        print(Annotation)
        page.removeAnnotation(Annotation)
        let replacement = PDFAnnotation(bounds: Annotation.bounds,forType: .freeText,withProperties: nil)

        replacement.contents = "[replaCED]"
        page.addAnnotation(replacement)
    }
}

mainPDFView.document = document

注意：添加/删除相同的注释也没有用.