iOS : activityType 不适用于 UIactivityViewController

iOS : activityType doesn't work on UIactivityViewController

嗨,这是我的代码,我已经实现了 UIactivityViewCotroller,但是当我点击时,我没有看到邮件和 Facebook 应用程序

@IBAction func activityView(_ sender: UIButton) {
    let text = "This is some text that I want to share."
    let textToShare = [ text ]
    let activityViewController = UIActivityViewController(activityItems: textToShare, applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view
    activityViewController.excludedActivityTypes = [ UIActivityType.airDrop, UIActivityType.postToFacebook, UIActivityType.mail ]
    self.present(activityViewController, animated: true, completion: nil)
}

但我没有看到那些应用 我该怎么办?

替换函数如下

@IBAction func activityView(_ sender: UIButton) {
    let text = "This is some text that I want to share."
    let textToShare = [ text ]
    let activityViewController = UIActivityViewController(activityItems: textToShare, applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view
        activityViewController.excludedActivityTypes = [ UIActivityType.airDrop ]
    self.present(activityViewController, animated: true, completion: nil)
}

Activity Controllers excludedActivityTypes 表示您要排除那些要在 activityController

中列出的共享选项