在Swift中将共享操作添加到UIAlertController

Question

我正在使用UIAlertController构建应用程序，我想要一个显示“共享”的按钮，然后打开类似

如果不是子按钮，这似乎很容易做到。

我的代码 ：

}


@IBAction func buttonTapped(sender: UIButton) {

    var title: String

    if sender.tag == correctAnswer {
        title = "Correct"
        ++score
    } else {
        title = "Wrong"

        let ac = UIAlertController(title: title, message: "Your score was \(score).", preferredStyle: .Alert)
        ac.addAction(UIAlertAction(title: "Try Again", style: .Default, handler: askQuestion))
        ac.addAction(UIAlertAction(title: "Share", style: .Default, handler: share))
        presentViewController(ac, animated: true, completion: nil)
        gameOver = true
        score = 0

    }

我的共享功能当前未定义。

Answer 1

您可以在完成处理程序中定义以在点击UIAlertAction之后打开UIActivityController ，但是默认情况下，iPhone中的Apple不会根据需要显示共享，而在iPad中是。 使用以下代码，您可以在点击按钮后显示共享：

let message = "The message"
let alertController = UIAlertController(title: "The title", message: message, preferredStyle: .Alert)

let shareAction = UIAlertAction(title: "Share", style: .Default, handler: { x -> Void in

     let firstActivityItem = "Text you want"
     let secondActivityItem : NSURL = NSURL(string: "http//:urlyouwant")!

     // If you want to put an image
     let image : UIImage = UIImage(named: "image.jpg")!

     let activityViewController : UIActivityViewController = UIActivityViewController(
                activityItems: [firstActivityItem, secondActivityItem, image], applicationActivities: nil)

     // Anything you want to exclude
     activityViewController.excludedActivityTypes = [
           UIActivityTypePostToWeibo,
           UIActivityTypePrint,
           UIActivityTypeAssignToContact,
           UIActivityTypeSaveToCameraRoll,
           UIActivityTypeAddToReadingList,
           UIActivityTypePostToFlickr,
           UIActivityTypePostToVimeo,
           UIActivityTypePostToTencentWeibo
      ]

      self.presentViewController(activityViewController, animated: true, completion: nil)
 })

alertController.addAction(shareAction)
self.presentViewController(alertController, animated: true, completion: nil)

在上面的代码中，我总结了添加更多按钮的过程，并假设您想要iPhone的代码，如果您也想要iPad的代码，则可以查看以下问题的答案：

• 如何添加此共享按钮？ 迅速的iOS8
• 在IOS应用中共享扩展

希望对您有所帮助。

Answer 2

如果您的share方法不起作用，请执行以下操作

ac.addAction(UIAlertAction(title: "Share", style: .Default, handler: { (action) -> Void in 
    // Do the Facebook sharing here
    let content = FBSDKSharePhotoContent()
    content.photo = ....
    ....
}))

Answer 3

这是一个答案：我将共享类定义为：

func share（操作：UIAlertAction！）{

    if SLComposeViewController.isAvailableForServiceType(SLServiceTypeFacebook) {
        let facebook:SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
        facebook.setInitialText("I just scored \(score) in Flagpoles.")

        self.presentViewController(facebook, animated: true, completion: nil)

        score = 0

    } else {
        let alert = UIAlertController(title: "Accounts", message: "Please login to a Facebook account to share.", preferredStyle: UIAlertControllerStyle.Alert)

        alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
        self.presentViewController(alert, animated: true, completion: nil)
    }