如何显示“复制”表格单元格的菜单？ [英] How to show "Copy" menu for a table cell?

问题描述

我会添加选项以复制联系人应用中的表格中的选定单元格。

I would add the option to copy the selected cell in a table like in the contacts app.

我曾尝试关注有关Objective-C的这个问题并提出这些问题Swift中的方法：

I have tried to follow this question about Objective-C and impliment those methods in Swift:

override func tableView(tableView: UITableView, shouldShowMenuForRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
    return (action == #selector(NSObject.copy(_:)))
}

然而，这是一个老问题，我无法使用 Swift 代码显示菜单。有人可以解释如何使用 shouldShowMenuForRowAtIndexPath 方法以及如何允许用户复制单元格。

However, that is an old question, and I can't get the menu to show up using Swift code. Could someone explain how the shouldShowMenuForRowAtIndexPath method is used and how to allow for a user to copy a cell.

推荐答案

您可以参考一个Objective-C示例，但您还没有完成它所说的内容去做！你的第二种方法是错误的方法。你想这样说：

You refer to an Objective-C example, but you have not done what it says to do! Your second method is the wrong method. You want to say this:

override func tableView(tableView: UITableView, canPerformAction action: Selector, 
    forRowAtIndexPath indexPath: NSIndexPath, withSender sender: AnyObject?) 
    -> Bool {
        return action == #selector(copy(_:))
}

你还需要第三次覆盖：

override func tableView(tableView: UITableView, performAction action: Selector, 
    forRowAtIndexPath indexPath: NSIndexPath, withSender sender: AnyObject?) {
        // ...
}

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