无法使用 swift 在 Facebook 上发布 QR 码图像

Question

我正在创建一个二维码阅读器应用程序，一旦创建了二维码图像，用户就可以将其发布到 Facebook 上。这是我的代码：

import UIKit
import Social
import MobileCoreServices

class NextViewController: UIViewController {

var userTextString : String?
@IBOutlet weak var QRCodeImage: UIImageView!
var tasteImage = UIImage(named: "Back.jpg")
@IBOutlet weak var userText: UILabel!
override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Share", style: UIBarButtonItemStyle.Bordered, target: self, action: "ShareIt")
    self.userText.text = self.userTextString
    var qrText = self.userTextString
    CGSize(width: 300, height: 300)
    self.QRCodeImage.image = {
        var qrCode = QRCode("\(qrText)")!
        qrCode.size = self.QRCodeImage.bounds.size
        return qrCode.image
        }()
}

func ShareIt(){

            var activityIteams : [AnyObject]?

            if QRCodeImage.image != nil{
                activityIteams = [userText.text as String!, self.QRCodeImage.image as UIImage!]
            }else{
                activityIteams = [userText.text as String!]
            }
            println(activityIteams)
            let activityController = UIActivityViewController(activityItems: activityIteams!, applicationActivities: nil)
            self.presentViewController(activityController, animated: true, completion: nil)
     }
}

但我无法使用此代码在 Facebook 上发布任何内容，如果我尝试仅发布文本，则它可以工作，但图像无法正常工作，我在控制台中得到了这个：

2015-03-04 16:45:18.128 testing[11389:160922] plugin com.apple.share.Facebook.post interrupted

如果我尝试另一个已经存储到项目中的图片，我可以轻松地将其发布到 facebook 但我不知道我的二维码图片有什么问题。

这是我的示例项目以获取更多信息。

https://github.com/DharmeshKheni/QR-Code

Answer 1

我得到了类似这样的解决方案：

首先我将图像保存到文档目录，然后从该目录中检索该图像，这对我来说很好用是我的更新代码。

import UIKit
import Social
import MobileCoreServices

class QRImage: UIViewController {

var userTextString : String?
@IBOutlet weak var QRCodeImage: UIImageView!
@IBOutlet weak var userText: UILabel!
var imageView = UIImageView()
override func viewDidLoad() {
    super.viewDidLoad()

    self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Share", style: UIBarButtonItemStyle.Bordered, target: self, action: "ShareIt")
    self.userText.text = self.userTextString
    var qrText = self.userTextString
    CGSize(width: 300, height: 300)

    self.QRCodeImage.image = {
        var qrCode = QRCode("\(qrText)")!
        qrCode.size = self.QRCodeImage.bounds.size

        return qrCode.image
        }()
    self.createThumBil()
}

func ShareIt(){

    var activityIteams : [AnyObject]?

        if QRCodeImage.image != nil{
            activityIteams = [userText.text as String!, self.imageView.image as UIImage!]
        }else{
            activityIteams = [userText.text as String!]
        }
        println(activityIteams)
        let activityController = UIActivityViewController(activityItems: activityIteams!, applicationActivities: nil)
        self.presentViewController(activityController, animated: true, completion: nil)
}

func getImage(){

    var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
    let getImagePath = paths.stringByAppendingPathComponent("QRCode.png")
    self.imageView.image = UIImage(contentsOfFile: getImagePath)
}

func createThumBil(){

    let originalImage : UIImage = self.QRCodeImage.image!
    let destinationSize : CGSize = CGSizeMake(200, 200)
    UIGraphicsBeginImageContext(destinationSize)
    originalImage.drawInRect(CGRectMake(0, 0, destinationSize.width, destinationSize.height))
    let newImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()
    let thumbNailimageData : NSData = UIImagePNGRepresentation(newImage)
    UIGraphicsEndImageContext()
    if let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) {
        if paths.count > 0 {
            if let dirPath = paths[0] as? String {
                println(dirPath)
                thumbNailimageData.writeToFile(dirPath.stringByAppendingPathComponent("QRCode.png"), atomically: true)
            }
        }
    }
    self.getImage()
    }
}