Taking existing pdf and annotating on it with user input.

PDFRender.swift

//  PDFRenderer.swift
//  MobileMakersAcademy
//
//  Created by Rich Fellure on 2/2/15.
//  Copyright (c) 2015 Mobile Makers. All rights reserved.
//

import Foundation

class PDFRenderer {

    class func renderPDFForSchool(school: String, andTeacherName teacher: String, withEstNumOfStudents students: String, andStartDate date: NSDate, completedWithPath: (path: String)-> Void) {
        var localUrl: NSURL = NSBundle.mainBundle().URLForResource("TeacherPlan", withExtension: "pdf")!

        var pdfDocumentRef: CGPDFDocumentRef = CGPDFDocumentCreateWithURL(localUrl as CFURLRef)

        var page1: CGPDFPageRef = CGPDFDocumentGetPage(pdfDocumentRef, 1)

        var paperSize = CGRectMake(0.0, 0.0, 792, 612)
        var pageSize = CGPDFPageGetBoxRect(page1, kCGPDFArtBox);

        var path = NSTemporaryDirectory()
        var temporaryPdfFilePath = path.stringByAppendingPathComponent("actionPlan.pdf")
        println(path)

        var graphicsContext = UIGraphicsBeginPDFContextToFile(temporaryPdfFilePath, pageSize, nil)

        UIGraphicsBeginPDFPageWithInfo(paperSize, nil)

        let currentContext: CGContextRef = UIGraphicsGetCurrentContext()

        CGContextTranslateCTM(currentContext, 0.0, paperSize.height)
        CGContextScaleCTM(currentContext, 1.0, -1.0)

        writeTextOnPageOne(school, andTeacherName: teacher, andNumberOfStudents: students, andStartDate: date.addDaysToDateAndReturnNormalString(0), forCurrentContext: currentContext, andDocumentRef: pdfDocumentRef, andPaperSize: paperSize)

        UIGraphicsBeginPDFPageWithInfo(paperSize, nil)
        CGContextTranslateCTM(currentContext, 0.0, paperSize.height)
        CGContextScaleCTM(currentContext, 1.0, -1.0)
        writeTextOnPageTwo(date, forCurrentContext: currentContext, andDocumentRef: pdfDocumentRef, andPaperSize: paperSize)
        UIGraphicsBeginPDFPageWithInfo(paperSize, nil)
        CGContextTranslateCTM(currentContext, 0.0, paperSize.height)
        CGContextScaleCTM(currentContext, 1.0, -1.0)
        writePageThreeTextForDate(date, forContext: currentContext, andDocumentRef: pdfDocumentRef, andPaperSize: paperSize)

        UIGraphicsEndPDFContext()

        completedWithPath(path: temporaryPdfFilePath)
    }

    private class func writeTextOnPageOne(schoolName: String, andTeacherName teacherName:String, andNumberOfStudents students: String, andStartDate date: String, forCurrentContext context: CGContextRef, andDocumentRef documentRef: CGPDFDocumentRef, andPaperSize size: CGRect) {

        var page: CGPDFPageRef = CGPDFDocumentGetPage(documentRef, 1)
        CGContextDrawPDFPage(context, page)

        CGContextTranslateCTM(context, 0.0, size.height)
        CGContextScaleCTM(context, 1.0, -1.0)

        writeText(schoolName, inRect: CGRectMake(179, 322, 500, 500))
        writeText(teacherName, inRect: CGRectMake(179, 382, 500, 500))
        writeText(students, inRect: CGRectMake(290, 480, 200, 200))
        writeText(date, inRect: CGRectMake(590, 480, 200, 200))
    }

    private class func writeTextOnPageTwo(date: NSDate, forCurrentContext context: CGContextRef, andDocumentRef docRef: CGPDFDocumentRef, andPaperSize size: CGRect) {
        var page : CGPDFPageRef = CGPDFDocumentGetPage(docRef, 2)
        CGContextDrawPDFPage(context, page)

        CGContextTranslateCTM(context, 0.0, size.height)
        CGContextScaleCTM(context, 1.0, -1.0)

        writeDateText(date.addDaysToDateAndReturnNormalString(150), inRect: CGRectMake(75, 160, 200, 200))
        writeDateText(date.addDaysToDateAndReturnNormalString(150), inRect: CGRectMake(75, 250, 200, 200))
        writeDateText(date.addDaysToDateAndReturnNormalString(120), inRect: CGRectMake(75, 330, 200, 200))
        writeDateText(date.addDaysToDateAndReturnNormalString(120), inRect: CGRectMake(75, 450, 200, 200))
        writeDateText(date.addDaysToDateAndReturnNormalString(60), inRect: CGRectMake(75, 520, 200, 200))
    }

    private class func writePageThreeTextForDate(date: NSDate, forContext context: CGContextRef, andDocumentRef docReg: CGPDFDocumentRef, andPaperSize size: CGRect) {
        var page : CGPDFPageRef = CGPDFDocumentGetPage(docReg, 3)
        CGContextDrawPDFPage(context, page)
        CGContextTranslateCTM(context, 0.0, size.height)
        CGContextScaleCTM(context, 1.0, -1.0)

        writeDateText(date.addDaysToDateAndReturnNormalString(30), inRect: CGRectMake(75, 160, 200, 200))
        writeDateText(date.addDaysToDateAndReturnNormalString(1), inRect: CGRectMake(75, 215, 200, 200))
    }

    private class func writeText(text: String, inRect rect: CGRect) {
        let font = UIFont(name: "Courier", size: 16)
        let text: String = text
        let rectText = rect
        let textStyle = NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy() as NSMutableParagraphStyle
        let textColor = UIColor.blackColor()
        let textFontAttributes = [
            NSFontAttributeName : font!,
            NSForegroundColorAttributeName: textColor,
            NSParagraphStyleAttributeName: textStyle,
        ]

        text.drawInRect(rectText, withAttributes: textFontAttributes)
    }

    private class func writeDateText(text:String, inRect rect: CGRect) {
        let font = UIFont(name: "Courier", size: 12)
        let text: String = text
        let rectText = rect
        let textStyle = NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy() as NSMutableParagraphStyle
        let textColor = UIColor.blackColor()
        let textFontAttributes = [
            NSFontAttributeName : font!,
            NSForegroundColorAttributeName: textColor,
            NSParagraphStyleAttributeName: textStyle,
        ]
        
        text.drawInRect(rectText, withAttributes: textFontAttributes)
    }

}

How do you use this?