iPhone、CGPDF文档 - PDF 链接

使用iPhone打开和阅读PDF文件

swift
func openPDF(atPath path: String) {
    guard let url = URL(string: path) else {
        print("无效的PDF文件路径")
        return
    }
    
    guard let document = CGPDFDocument(url as CFURL) else {
        print("无法打开PDF文件")
        return
    }
    
    guard let page = document.page(at: 1) else {
        print("无法获取PDF文件的第一页")
        return
    }
    
    // 在此处进行页面渲染和显示的代码
}

swift
func renderPDFPage(_ page: CGPDFPage, inView view: UIView) {
    guard let context = UIGraphicsGetCurrentContext() else {
        print("无法获取绘图上下文")
        return
    }
    
    let pageSize = page.getBoxRect(.mediaBox)
    let scale = min(view.bounds.width / pageSize.width, view.bounds.height / pageSize.height)
    let transform = page.getDrawingTransform(.mediaBox, rect: view.bounds, rotate: 0, preserveAspectRatio: true)
    
    context.concatenate(transform)
    context.scaleBy(x: scale, y: scale)
    context.drawPDFPage(page)
    
    view.setNeedsDisplay()
}