如何在iOSPDFKit中正確傳遞陣列

我正在嘗試在一個[string]陣列中獲取 PDF。以下是我到目前為止所擁有的。我想我需要做一個foreach地方，但我不完全確定。

我認為這樣的事情可能會奏效，但事實并非如此。

       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)
}

添加一些額外的細節。如果我不使用[String]并且只使用String一切正常。生成了 PDF，我正在努力理解的概念是如何為 PDF 傳遞一個陣列。

var courseAttendees : [String] = ["name", "name", "name", "name"]

例如，我想傳遞courseAttendees然后回圈遍歷陣列，名稱只是重疊并顯示在下面。

最終代碼。

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)
         }
    }

uj5u.com熱心網友回復：

根據您的問題和影像，我假設 PDF 創建作業正常，但資料未按預期呈現。

我認為這里要回答的兩個問題是：

1. 在哪里回圈遍歷陣列
2. 如何跟蹤頁面中負責垂直定位的當前y坐標

以下是我為嘗試解決您的問題而添加的一些內容，我已對我所做的更改添加了評論

// 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)
    }
}

我沒有測驗過上面的，所以請試一試，看看它是否能解決你的問題。

如果沒有，請發表評論，我會相應地更新。

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