Create PDF from Image iOS

I am trying to create a pdf of an image that I have now loaded into an image view. I think my code is correct, but when I check the document folder on the simulator, nothing appears. Any ideas? Here is the code related to my botton:

    @IBAction func saveToPdf(sender: AnyObject) {
    var fileName:String = "new.pdf"
    var rect =  CGRectMake(0, 0, 850, 1100)
    var path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory,.UserDomainMask, true)[0] as String
    var pdfPath = path.stringByAppendingPathComponent(fileName)
    UIGraphicsBeginPDFContextToFile(pdfPath, CGRectZero, nil)
    UIGraphicsBeginPDFPageWithInfo(rect, nil)
    var currentContext:CGContextRef = UIGraphicsGetCurrentContext()
    imageView.image?.drawInRect(rect)
    UIGraphicsEndPDFContext()
}