如何缩放UIVIew以适应a4纸张尺寸

Question

I am developing application to convert UIView to PDF file and fit it into A4 paper size to print.

How can I scale any UIView to fit into A4 paper size?

I ned my UIView to completely fit into an A4 page.

Answer 1

you can convert something like,

    func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String)
{
    let pdfData = NSMutableData()
    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil)
    UIGraphicsBeginPDFPage()

    guard let pdfContext = UIGraphicsGetCurrentContext() else { return }

    aView.layer.renderInContext(pdfContext)
    UIGraphicsEndPDFContext()

    if let documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first {
        let documentsFileName = documentDirectories + "/" + fileName
        debugPrint(documentsFileName)
        pdfData.writeToFile(documentsFileName, atomically: true)
    }
}

Read this article for more details and to know that how to render it in different sizes.