How can I properly pass an array in iOS PDFKit - swift

Question

I'm trying to in an [string] array for a PDF. Below is what I have so far. I am guess I need to do a foreach somewhere, but I'm not entirely sure.
I thought something like this might work, but it does not.
for entry in body {
let attributedText = NSAttributedString(
string: entry,
attributes: textAttributes
)
}
private func addBody(body: [String], pageRect: CGRect, textTop: CGFloat) {
let pageWidth = 8.5 * 72.0
let pageHeight = 11 * 72.0
let pageRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight)
let bodyCG = addInstructor(instructor: "", pageRect: pageRect)
let textFont = UIFont.systemFont(ofSize: 12.0, weight: .regular)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .natural
paragraphStyle.lineBreakMode = .byWordWrapping
let textAttributes = [
NSAttributedString.Key.paragraphStyle: paragraphStyle,
NSAttributedString.Key.font: textFont
]
let attributedText = NSAttributedString(
string: body,
attributes: textAttributes
)
let textRect = CGRect(
x: 15,
y: bodyCG + 30,
width: pageRect.width - 20,
height: pageRect.height - textTop - pageRect.height / 5.0
)
attributedText.draw(in: textRect)
}
Adding some additional details. If I don't use [String] and just use String everything works fine. The PDF is generated, The concept I'm struggling to understand is how can I pass an array for the PDF.
var courseAttendees : [String] = ["name", "name", "name", "name"]
For Example, I want to pass courseAttendees and then loop through the array the names are just overlapped and shown below.
Final code.
private func addBody(body: [String], textTop: CGFloat) {
let pageWidth = 8.5 * 72.0
let pageHeight = 11 * 72.0
let pageRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight)
let bodyCG = addInstructor(instructor: "", pageRect: pageRect)
let textFont = UIFont.systemFont(ofSize: 12.0, weight: .regular)
let textAttributes: [NSAttributedString.Key: Any] =
[NSAttributedString.Key.font: textFont]
// keep track of the y position on the page. You might need
// to set this globally as you have multiple pages
var currentYPos: CGFloat = bodyCG
// Loop through the array
for entry in body {
let attributedText = NSAttributedString(
string: "\(entry)",
attributes: textAttributes
)
// Update the currentYPos
currentYPos += 15
// Use the currentYPos in the textRect
let textRect = CGRect(
x: 15,
y: currentYPos,
width: pageRect.width - 20,
height: pageRect.height - textTop - pageRect.height / 5.0
)
attributedText.draw(in: textRect)
}
}

Answer 1

Based on your question and image, I am assuming the PDF creation works fine but the data is not rendered as desired.
I think the two questions to answer here are:
Where to loop through your array
How to keep track of the current y coordinate in the page which is responsible for the vertical positioning
Here are some additions I made to try and fix your issue, I have added comments to what I have changed
// Somewhere appropriate in your code
var courseAttendees : [String] = ["name1", "name2", "name3", "name4"]
// Call the function, 15 is just a random number for textTop,
// give it what you feel is appropriate
addBody(body: courseAttendees, textTop: 15)
// I have removed the pageRect parameter since you create it
// in the function
private func addBody(body: [String], textTop: CGFloat) {
let pageWidth = 8.5 * 72.0
let pageHeight = 11 * 72.0
let pageRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight)
let bodyCG = addInstructor(instructor: "", pageRect: pageRect)
let textFont = UIFont.systemFont(ofSize: 12.0, weight: .regular)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .natural
paragraphStyle.lineBreakMode = .byWordWrapping
let textAttributes = [
NSAttributedString.Key.paragraphStyle: paragraphStyle,
NSAttributedString.Key.font: textFont
]
// keep track of the y position on the page. You might need
// to set this globally as you have multiple pages
var currentYPos: CGFloat = 0.0
// Loop through the array
for entry in body {
let attributedText = NSAttributedString(
string: entry,
attributes: textAttributes
)
// Update the currentYPos
currentYPos += bodyCG + 30
// Use the currentYPos in the textRect
let textRect = CGRect(
x: 15,
y: currentYPos,
width: pageRect.width - 20,
height: pageRect.height - textTop - pageRect.height / 5.0
)
attributedText.draw(in: textRect)
}
}
I have not tested the above so please give this a try and check if it solves your issue.
If not, comment and I will update this accordingly.