Question

我试图弄清楚如何以编程方式显示系统共享菜单，但我能找到的所有信息都是how to register an app to said menu。

如何以编程方式调用对话框？

Answer 1

你需要创建一个UIActivityViewController的实例，这是一个简单的例子

let objectsToShare = ["a string"]
let activityController = UIActivityViewController(
        activityItems: objectsToShare,
        applicationActivities: nil)

    // if your app can run on an iPad, this menu
    // will present as a pop over controller
    // and as such, needs to be configured
    // consider the bar button item property
    // if needed

    // should be the rect that the pop over should anchor to
    activityController.popoverPresentationController?.sourceRect = view.frame
    activityController.popoverPresentationController?.sourceView = view
    activityController.popoverPresentationController?.permittedArrowDirections = .any

    // present the controller
    present(activityController, animated: true, completion: nil)

在iOS 8上调用系统共享菜单

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