是否可以在PDFKit中更改contents
注释的文本(即FreeText
),而无需删除注释/构建新注释?
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详细信息):
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/删除相同的注释也无济于事。
答案 0 :(得分:0)
我建议您使用经典的for循环遍历注释数组,并找到要修改的注释的索引,此后,对数组进行下标应将注释“就地”修改。
下面是修改所有注释的示例:
let url = Bundle.main.url(forResource: "Test", withExtension: "pdf")!
let document = PDFDocument(url: url)!
for index1 in 0..<document.pageCount {
let page: PDFPage = document.page(at: index)!
let annotations = page.annotations
for index2 in 0..<annotations.count {
annotations[index2].contents = "[REPLACED]"
}
}
已了解有关变异数组的信息:http://kelan.io/2016/mutating-arrays-of-structs-in-swift/
希望它会有所帮助,加油!
LE:实际上这是一个错误,请参阅以下内容:iOS 11 PDFKit not updating annotation position
也许当您更改注解内容时,Apple会找到一种在屏幕上更新PDFView的方法。
答案 1 :(得分:0)
您是否尝试过在更新注释的文本后调用pdfView.annotationsChanged(on: pdfPage)
?