为什么我的共享对话框为空？ Facebook SDK

Question

我正在尝试发布到Facebook，其工作正常，但我的内容变量中没有任何字符串被添加到共享对话框中。

let content : FBSDKShareLinkContent = FBSDKShareLinkContent()
content.contentURL = NSURL(string: "<INSERT STRING HERE>")
content.contentTitle = "My Title Here"
content.contentDescription = "My description here!"
content.imageURL = NSURL(string: "<INSERT STRING HERE>")


let shareDialog = FBSDKShareDialog()
shareDialog.fromViewController = self
shareDialog.shareContent = content
shareDialog.delegate = self

if !shareDialog.canShow() {
    print("cannot show native share dialog")
}

shareDialog.show()

Answer 1

Facebook的政策不允许您预先填充状态消息，并要求所有内容都是用户生成的。这是我所做的，我设法在Facebook弹出窗口中获取URL：

let activityItems = ["My app text", "", "http://google.com"]

let vc = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
        self.presentViewController(vc, animated: true, completion: nil)

如果我打开Twitter，我会得到＆＃34;我的应用文字＆＃34;和URL，对于Facebook我只获得URL。