使用swift放大PDFKit中的特定坐标 [英] Zoom in to specific coordinates in PDFKit using swift

问题描述

我正在使用pdfkit在我的应用程序中打开pdf文件.

I am using pdfkit to open pdf file in my app.

我想放大特定的坐标.

I want to zoom in to specific coordinates.

让我们说以下是我的pdf页面，当用户单击铅笔按钮时，我想放大到特定的坐标.

Let say Following is my pdf page and I want to zoom in to specific coordinates when user will click on pencil button.

单击铅笔按钮后，它应该类似于下图.

After clicking on pencil button it should be look like following image.

我进行了很多搜索，但找不到任何合适的解决方案.我不想使用第三方库来做到这一点.

I've searched a lot but couldn't find any proper solution for that. I don't want to use third party libraries to do that.

推荐答案

我通过使用以下代码解决了这个问题.

I solved this problem by using following code.

let documents = pdfView.document
    if let page = documents?.page(at: 0) {
        pdfView.scaleFactor = pdfView.scaleFactorForSizeToFit * 2
        pdfView.go(to: CGRect(x: 0, y: 0, width: 300, height: 300), on: page)
    }

这是将代码放大到特定坐标.

This is the zoom in code to specific coordinates.

还有另一件事需要注意.您需要关闭 分页pdfView.usePageViewController(false).

There is one more thing that needs attention. You need to turn off pagination pdfView.usePageViewController(false).

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