PDF生成Swift

Question

我正试着用swift生成一个pdf。下面的代码编译时没有错误，但是永远不会创建"xp.pdf“文档。非常感谢您的帮助。

import UIKit

import Foundation

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    @IBAction func generatePDF(sender: AnyObject) {

        let pageSize:CGSize = CGSizeMake (850, 1100)
        let fileName: NSString = "xp.pdf"
        let path:NSArray = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
        let documentDirectory: AnyObject = path.objectAtIndex(0)
        let pdfPathWithFileName = documentDirectory.stringByAppendingPathComponent(fileName)

        generatePDFs(pdfPathWithFileName)

        }

    func generatePDFs(filePath: String) {
        UIGraphicsBeginPDFContextToFile(filePath, CGRectZero, nil)
        UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 850, 1100), nil)
        drawBackground()
        UIGraphicsEndPDFContext()




    }

    func drawBackground () {

       let context:CGContextRef = UIGraphicsGetCurrentContext()
        let rect:CGRect = CGRectMake(0, 0, 850, 1100)
        CGContextSetFillColorWithColor(context, UIColor.greenColor().CGColor)
        CGContextFillRect(context, rect)
    }

Answer 1

你这里有pdfkit吗？据我所知，PSPDFKit运行得相当好。您只需从pspdfkit.com下载它，然后将PSPDFKit.framework拖放到应用程序目标的“嵌入式二进制文件”部分。你确实需要为它付钱，所以就是这样。我认为它有一个免费的试用版，所以你可以试一试，看看这是不是你需要的。

Answer 2

对于Xcode 7 (swift 2.0)，我必须进行以下更改才能使其正常工作：

替换：

let pdfPathWithFileName = documentDirectory.stringByAppendingPathComponent(fileName)

通过以下方式：

let pdfPathWithFileName = documentDirectory.stringByAppendingPathComponent(fileName as String)

并解开UIGraphicsGetCurrentContext()

let context:CGContextRef = UIGraphicsGetCurrentContext()!

您还可以删除：

let pageSize:CGSize = CGSizeMake (850, 1100)

因为您从未使用过pageSize