在 Swift 中从 UIScrollView 创建 PDF 文件

Question

我想从 UIScrollView 的内容创建一个 PDF 文件。

func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String) {
    let pdfData = NSMutableData()
    let height = 1754.0
    let width = 1240.0
    UIGraphicsBeginPDFContextToData(pdfData, CGRect(x:-30, y:15,width:width,height:height) , nil)
    UIGraphicsBeginPDFPage()
    guard let pdfContext = UIGraphicsGetCurrentContext() else { return }

    aView.layer.render(in: pdfContext)
    UIGraphicsEndPDFContext()

    if let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first {
        let documentsFileName = documentDirectories + "/" + fileName
        debugPrint(documentsFileName)
        pdfData.write(toFile: documentsFileName, atomically: true)
    }
}

我希望代码生成一个面向滚动视图中内容大小的 PDF。

该代码目前仅生成静态 PDF。如果滚动视图中的内容大于 PDF 页面，则内容被截断。

Answer 1

func createPdfFromView()
{
    // Set frame as per content of view

    self.spreadsheetView.frame = CGRect(x: 0, y: 0, width: self.spreadsheetView.contentSize.width, height: self.spreadsheetView.contentSize.height)
    let pdfPageBounds: CGRect = self.spreadsheetView.frame
    let pdfData: NSMutableData = NSMutableData()

    // Rendering spreadsheetView
    UIGraphicsBeginPDFContextToData(pdfData, pdfPageBounds, nil)
    UIGraphicsBeginPDFPageWithInfo(pdfPageBounds, nil)
    self.spreadsheetView.layer.render(in: UIGraphicsGetCurrentContext()!)
    UIGraphicsEndPDFContext()
    let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
    let documentsFileName = documentDirectories! + "/" + "pdfName.pdf"
    pdfData.write(toFile: documentsFileName, atomically: true)
    print(documentsFileName)

    // Reset spreadsheetView
    self.spreadsheetView.frame = CGRect(x: 0, y: 64, width: self.view.frame.width, height: self.view.frame.height)
    self.spreadsheetView.layoutSubviews()
    self.spreadsheetView.layoutIfNeeded()
    self.spreadsheetView.reloadData()}

希望它能帮助您从电子表格创建 PDF。

参考号 Github代码链接：SpreadsheetView