How to draw text in PDF context in Swift? - swift

Question

I have a simple function that create pdf file and return its path.
func createPDFFileAndReturnPath() -> String {
let fileName = "pdffilename.pdf"
let paths = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true)
let documentsDirectory = paths[0]
let pathForPDF = documentsDirectory.stringByAppendingString("/" + fileName)
UIGraphicsBeginPDFContextToFile(pathForPDF, CGRectZero, nil)
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 100, 400), nil)
let text = "text" //how to print this in whatever place?
//text.drawInRect - this doesn't work
UIGraphicsEndPDFContext()
return pathForPDF
}

Answer 1

Here is your function:
func createPDFFileAndReturnPath() -> String {
let fileName = "pdffilename.pdf"
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let documentsDirectory = paths[0] as! NSString
let pathForPDF = documentsDirectory.stringByAppendingString("/" + fileName)
UIGraphicsBeginPDFContextToFile(pathForPDF, CGRectZero, nil)
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 100, 400), nil)
let font = UIFont(name: "Helvetica Bold", size: 14.0)
let textRect = CGRectMake(5, 3, 125, 18)
var paragraphStyle:NSMutableParagraphStyle = NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy() as! NSMutableParagraphStyle
paragraphStyle.alignment = NSTextAlignment.Left
paragraphStyle.lineBreakMode = NSLineBreakMode.ByWordWrapping
let textColor = UIColor.blackColor()
let textFontAttributes = [
NSFontAttributeName: font!,
NSForegroundColorAttributeName: textColor,
NSParagraphStyleAttributeName: paragraphStyle
]
let text:NSString = "Hello world"
text.drawInRect(textRect, withAttributes: textFontAttributes)
UIGraphicsEndPDFContext()
return pathForPDF
}

Answer 2

Sebastian's Answer - Updated for Swift 4.2
func createPDFFileAndReturnPath() -> String {
let fileName = "pdffilename.pdf"
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentsDirectory = paths[0] as NSString
let pathForPDF = documentsDirectory.appending("/" + fileName)
UIGraphicsBeginPDFContextToFile(pathForPDF, CGRect.zero, nil)
UIGraphicsBeginPDFPageWithInfo(CGRect(x: 0, y: 0, width: 100, height: 400), nil)
let font = UIFont(name: "System", size: 14.0)
let textRect = CGRect(x: 5, y: 3, width: 125, height: 18)
let paragraphStyle:NSMutableParagraphStyle = NSMutableParagraphStyle.default.mutableCopy() as! NSMutableParagraphStyle
paragraphStyle.alignment = NSTextAlignment.left
paragraphStyle.lineBreakMode = NSLineBreakMode.byWordWrapping
let textColor = UIColor.black
let textFontAttributes = [
NSAttributedString.Key.font: font!,
NSAttributedString.Key.foregroundColor: textColor,
NSAttributedString.Key.paragraphStyle: paragraphStyle
]
let text:NSString = "Hello world"
text.draw(in: textRect, withAttributes: textFontAttributes)
UIGraphicsEndPDFContext()
return pathForPDF
}