共享图片和文字给Facebook Messenger的使用UIActivityViewController失败

Question

Question共享图片和文字给Facebook Messenger的使用UIActivityViewController失败

What changes to the code below must be made to ensure Messenger plays nicely with UIActivityViewController and shares both the image and text, or at the very least, the image?

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背景

我使用UIActivityViewController从我的应用程序共享文本和图像，并将它们发送到电子邮件，消息和其他共享应用程序。 UIActivityViewController是伟大的，并与大多数应用程序以简单和标准的方式工作......但是，我与Messenger（Facebook Messenger）不想合作的问题。

在下面的代码，我一个轻按UIButton这需要在屏幕的快照图像，把它变成一个.png和然后用我的准备文本（textShare）到UIActivityViewController一起发送准备的图像（imageShare）。这个简单的方法允许我的应用程序成功地分享电子邮件，消息和除Messenger以外的许多其他共享应用

（侧面说明，Facebook是唯一能够分享准备好的图像（imageShare），而不是文本。）

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问题

尝试与UIActivityViewController分享时，这些都是问题给Messenger：

• 当共享activityItems: [textShare, imageShare]

  • Messenger只发送共享文本。

• 当共享activityItems: [textShare]

  • 选项分享到Messenger甚至没有在UIActivityViewController可用。

• 当共享activityItems: [imageShare]

  • ，则显示错误：“无法加载内容。加载您的内容时出现问题。请重试。”

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代码

@IBAction func myButton(sender: UIButton) { 

    // Take snapshot of screen 
    let imageSnapshot: UIImage! 
    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, false, 0) 
    self.view.drawViewHierarchyInRect(CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height), afterScreenUpdates: false) 
    imageSnapshot = UIGraphicsGetImageFromCurrentImageContext() 
    UIGraphicsEndImageContext() 

    // Prepare text to share 
    let textShare: String! 
    textShare = "This is my original text." 

    // Prepare image to share 
    let imageShare: NSData 
    imageShare = UIImagePNGRepresentation(imageSnapshot)! 

    // Share text and image 
    let activity = UIActivityViewController(activityItems: [textShare, imageShare], applicationActivities: nil) 
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone { 
     self.presentViewController(activity, animated: true, completion: nil) 
    } 

} 

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图片

的iOS呈现UIActivityViewController与可用的应用程序。

Answer 1

尝试使用UIImage的NSData的代替。你可以将UIImage转换为AnyObject并添加到你的数组中。

而且看这个问题：Sharing image using UIActivityViewController

Answer 2

let textShare = "This is my original text." 
var shareObject = [AnyObject]() 
if textShare != nil { 
    shareObject.append(textShare as AnyObject) 
} 

let Yourimage = UIImage(named: "image.png") 
let imageData = UIImagePNGRepresentation(Yourimage!) as NSData? 

if let data = imageData { 
    shareObject.append(data) 
} 

if shareObject.count > 0 { // check condition for text and image 
    let activityViewController = UIActivityViewController(activityItems: shareObject, applicationActivities: nil) 
    activityViewController.popoverPresentationController?.sourceView = self.view 
    present(activityViewController, animated: true, completion: nil) 
} 

Answer 3

所以需要的是什么到底是转换NSData回UIImage的一个额外的步骤。

Note, the one issue with this approach of converting NSData back into UIImage is that it produces image quality that is either lossless (i.e. Message and Mail) or lossy (i.e. Notes, Photos, Messenger).

Interestingly Messages, Mail, and a variety of third party sharing apps were quite content sharing the NSData in the UIActivityViewController whereas Messenger would just not tolerate it. (I'd be interested to understand why exactly?)

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变化

从这：

// Prepare image to share 
    let imageShare: NSData 
    imageShare = UIImagePNGRepresentation(imageSnapshot)! 

要的是：

// Prepare image to share 
    let imageShareData: NSData 
    imageShareData = UIImagePNGRepresentation(imageSnapshot)! 
    let imageShare = UIImage(data: imageShareData)! 

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最后的工作代码

@IBAction func myButton(sender: UIButton) { 

    // Take snapshot of screen 
    var imageSnapshot: UIImage! 
    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, false, 0) 
    self.view.drawViewHierarchyInRect(CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height), afterScreenUpdates: false) 
    imageSnapshot = UIGraphicsGetImageFromCurrentImageContext() 
    UIGraphicsEndImageContext() 

    // Prepare text to share 
    let textShare: String! 
    textShare = "This is my original text." 

    // Prepare image to share 
    let imageShareData: NSData 
    imageShareData = UIImagePNGRepresentation(imageSnapshot)! 
    let imageShare = UIImage(data: imageShareData)! 

    // Share text and image 
    let activity = UIActivityViewController(activityItems: [textShare, imageShare], applicationActivities: nil) 
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone { 
     self.presentViewController(activity, animated: true, completion: nil) 
    } 

}