func drawOnPDF(path: String)
{
// Get existing Pdf reference
let pdf = CGPDFDocumentCreateWithURL(NSURL(fileURLWithPath: path))
// Get page count of pdf, so we can loop through pages and draw them accordingly
let pageCount = CGPDFDocumentGetNumberOfPages(pdf);
// Write to file
UIGraphicsBeginPDFContextToFile(path, CGRectZero, nil)
// Write to data
// var data = NSMutableData()
// UIGraphicsBeginPDFContextToData(data, CGRectZero, nil)
for index in 1...pageCount {
let page = CGPDFDocumentGetPage(pdf, index)
let pageFrame = CGPDFPageGetBoxRect(page, kCGPDFMediaBox)
UIGraphicsBeginPDFPageWithInfo(pageFrame, nil)
var ctx = UIGraphicsGetCurrentContext()
// Draw existing page
CGContextSaveGState(ctx);
CGContextScaleCTM(ctx, 1, -1);
CGContextTranslateCTM(ctx, 0, -pageFrame.size.height);
CGContextDrawPDFPage(ctx, page);
CGContextRestoreGState(ctx);
// Draw image on top of page
var image = UIImage(named: "signature3")
image?.drawInRect(CGRectMake(100, 100, 100, 100))
// Draw red box on top of page
//UIColor.redColor().set()
//UIRectFill(CGRectMake(20, 20, 100, 100));
}
UIGraphicsEndPDFContext()
}
My problem is PDF convert to image but how to open image in View then swipe left,right,up and down how to possible
All these solution converts a single pdf page into an UIImage
. Here is my findings for converting multiple page pdf into a single image
func drawPDFfromURL(url: URL) -> UIImage? {
guard let document = CGPDFDocument(url as CFURL) else { return nil }
var width: CGFloat = 0
var height: CGFloat = 0
// calculating overall page size
for index in 1...document.numberOfPages {
print("index: \(index)")
if let page = document.page(at: index) {
let pageRect = page.getBoxRect(.mediaBox)
width = max(width, pageRect.width)
height = height + pageRect.height
}
}
// now creating the image
let renderer = UIGraphicsImageRenderer(size: CGSize(width: width, height: height))
let image = renderer.image { (ctx) in
ctx.cgContext.scaleBy(x: 1.0, y: -1.0)
for index in 1...document.numberOfPages {
if let page = document.page(at: index) {
let pageRect = page.getBoxRect(.mediaBox)
ctx.cgContext.translateBy(x: 0.0, y: -pageRect.height)
ctx.cgContext.drawPDFPage(page)
}
}
ctx.cgContext.scaleBy(x: 1.0, y: -1.0)
}
return image
}
Swift 3:
func convertPDFPageToImage(page:Int) {
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let filePath = documentsURL.appendingPathComponent("pathLocation").path
do {
let pdfdata = try NSData(contentsOfFile: filePath, options: NSData.ReadingOptions.init(rawValue: 0))
let pdfData = pdfdata as CFData
let provider:CGDataProvider = CGDataProvider(data: pdfData)!
let pdfDoc:CGPDFDocument = CGPDFDocument(provider)!
pageCount = pdfDoc.numberOfPages;
let pdfPage:CGPDFPage = pdfDoc.page(at: page)!
var pageRect:CGRect = pdfPage.getBoxRect(.mediaBox)
pageRect.size = CGSize(width:pageRect.size.width, height:pageRect.size.height)
print("\(pageRect.width) by \(pageRect.height)")
UIGraphicsBeginImageContext(pageRect.size)
let context:CGContext = UIGraphicsGetCurrentContext()!
context.saveGState()
context.translateBy(x: 0.0, y: pageRect.size.height)
context.scaleBy(x: 1.0, y: -1.0)
context.concatenate(pdfPage.getDrawingTransform(.mediaBox, rect: pageRect, rotate: 0, preserveAspectRatio: true))
context.drawPDFPage(pdfPage)
context.restoreGState()
let pdfImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
self.imageView.image = pdfImage
}
catch {
}
}
I have found a cool solution. Borrowed from here: https://www.hackingwithswift.com/example-code/core-graphics/how-to-render-a-pdf-to-an-image
func drawPDFfromURL(url: URL) -> UIImage? {
guard let document = CGPDFDocument(url as CFURL) else { return nil }
guard let page = document.page(at: 1) else { return nil }
let pageRect = page.getBoxRect(.mediaBox)
let renderer = UIGraphicsImageRenderer(size: pageRect.size)
let img = renderer.image { ctx in
UIColor.white.set()
ctx.fill(pageRect)
ctx.cgContext.translateBy(x: 0.0, y: pageRect.size.height)
ctx.cgContext.scaleBy(x: 1.0, y: -1.0)
ctx.cgContext.drawPDFPage(page)
}
return img
}
I Got the Solution for Pdf page convert in UIImage. This code PDF Page convert in Uiimage and save in image document directory. PDF Download And Page Count to separate Page vise image convert.
func drawOnPDF(path: String)
{
var urlstr: NSURL = NSURL.fileURLWithPath(path)!
var pdf: CGPDFDocumentRef = CGPDFDocumentCreateWithURL(urlstr)
var page: CGPDFPageRef;
var frame: CGRect = CGRectMake(0, 0, 100, 200)
var pageCount: Int = CGPDFDocumentGetNumberOfPages(pdf);
for (var i = 0; i < pageCount; i++)
{
var mypage: CGPDFPageRef = CGPDFDocumentGetPage(pdf, i+1)
frame = CGPDFPageGetBoxRect(mypage, kCGPDFMediaBox)
UIGraphicsBeginImageContext(CGSizeMake(600, 600*(frame.size.height/frame.size.width)))
var ctx: CGContextRef = UIGraphicsGetCurrentContext()
CGContextSaveGState(ctx)
CGContextTranslateCTM(ctx, 0.0, frame.size.height)
CGContextScaleCTM(ctx, 1.0, -1.0)
CGContextSetGrayFillColor(ctx, 1.0, 1.0)
CGContextFillRect(ctx, frame)
page = CGPDFDocumentGetPage(pdf, i + 1)
var pdfTransform: CGAffineTransform = CGPDFPageGetDrawingTransform(page, kCGPDFMediaBox, frame, 0, true)
CGContextConcatCTM(ctx, pdfTransform);
CGContextSetInterpolationQuality(ctx, kCGInterpolationHigh)
CGContextSetRenderingIntent(ctx, kCGRenderingIntentDefault)
CGContextDrawPDFPage(ctx, page)
var thumbnailImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
CGContextRestoreGState(ctx)
var documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as! String
documentsPath = documentsPath.stringByAppendingFormat("/Page%d.png", i+1)
UIGraphicsEndImageContext()
imagedata = UIImagePNGRepresentation(thumbnailImage)
imagedata.writeToFile(documentsPath, atomically: true)
array.addObject(documentsPath)
}
let dirPath = array.objectAtIndex(0) as? String
let image = UIImage(contentsOfFile: dirPath!)
NSUserDefaults.standardUserDefaults().setObject(array, forKey: "Array")
println("\(array)")
}
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