ios - PDFView 不突出显示搜索结果

Question

我正在试用 PDFView 并想突出显示搜索到的词。我在关注这个小 tutorial right here (见搜索段落)。

我正在为我的 PDF 获取匹配项，但是当我设置 pdfView.highlightedSelections = searchedItems 时没有任何反应。

这是我的代码(VC 扩展了 PDFDocumentDelegate)

var document: PDFDocument!
var searchedItems: [PDFSelection] = []


override func viewDidLoad() {
    super.viewDidLoad()

    let url = Bundle.main.url(forResource: "test3", withExtension: "pdf")
    document = PDFDocument(url: url!)
    pdfView.document = document
    pdfView.document?.delegate = self
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    pdfView.document?.findString("Product", withOptions: .caseInsensitive)
}

func documentDidEndDocumentFind(_ notification: Notification) {
    pdfView.highlightedSelections = nil
    pdfView.highlightedSelections = searchedItems
}

func documentDidFindMatch(_ notification: Notification) {
    if let selection = notification.userInfo?.first?.value as? PDFSelection {
        selection.color = .yellow
        searchedItems.append(selection)
        print("didFindMatch")
    }
}

Answer 1

好吧，我自己想通了，通过阅读这里的这个线程:https://forums.developer.apple.com/thread/93414

highlightedSelections 似乎没有按照记录工作。我将向 Apple 提交错误。

PDFSelection 本身有一个类型为 PDFSelection 的内部数组。有了这个，我可以在一个中添加多个选择。之后我可以使用 pdfView.setCurrentSelection(_:animate:) 来设置这个嵌套的选择数组。

var document: PDFDocument!
var searchedItem: PDFSelection?

override func viewDidLoad() {
    super.viewDidLoad()

    let url = Bundle.main.url(forResource: "test3", withExtension: "pdf")
    document = PDFDocument(url: url!)
    pdfView.document = document
    pdfView.document?.delegate = self
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
        self.document?.beginFindString("Product", withOptions: .caseInsensitive)        
}

func documentDidEndDocumentFind(_ notification: Notification) {
    pdfView.setCurrentSelection(searchedItem, animate: true)
}

func documentDidFindMatch(_ notification: Notification) {
    if let selection = notification.userInfo?.first?.value as? PDFSelection {
        selection.color = .yellow
        if searchedItem == nil {
            // The first found item sets the object.
            searchedItem = selection
        } else {
            // All other found selection will be nested
            searchedItem!.add(selection)
        }
    }
}