如何使pdfView缩放=100%以适应屏幕尺寸

Question

所以我有这个 pdfView，我想让它的第一个显示是页面 100% 的缩放，但问题是我现在放大太多，而且 UI 不太漂亮。

我的代码是这样的：

    let pdfView = PDFView()

    pdfView.translatesAutoresizingMaskIntoConstraints = false
    pdfView.autoScales = true
    pdfView.maxScaleFactor = 4.0
    pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
    view.addSubview(pdfView)

    pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
    pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
    pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
    pdfView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
    
    
    guard let path = Bundle.main.url(forResource: materia , withExtension: "pdf") else { return }

    if let document = PDFDocument(url: path) {
        pdfView.document = document
    }

我想要怎样

怎么样

Answer 1

我知道这听起来很疯狂，但你所要做的就是pdfView.autoScales = true把pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit

我的狙击：

        let pdfViewer = PDFView();
        
        if let path = Bundle.main.url(forResource: "test", withExtension: "pdf") {
            pdfViewer.document = PDFDocument(url: path);
        }
        
        pdfViewer.maxScaleFactor = 4.0;
        pdfViewer.minScaleFactor = pdfViewer.scaleFactorForSizeToFit;
        pdfViewer.autoScales = true;
       
        
        self.view.addSubview(pdfViewer);
        pdfViewer.translatesAutoresizingMaskIntoConstraints = false;
        
        pdfViewer.leadingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leadingAnchor, constant: 0).isActive = true;
        pdfViewer.trailingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.trailingAnchor, constant: 0).isActive = true;
        pdfViewer.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true;
        pdfViewer.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor, constant: 0).isActive = true;