如何在Swift中设置NSButton的key等效于NSDownArrowFunctionKey | 如何在Swift中设置NSButton的key等效于NSDown

本文介绍了如何在Swift中设置NSButton的key等效于NSDownArrowFunctionKey的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何在Swift中将NSButton的keyEquivalent(字符串类型)设置为向下箭头键? NSDownArrowFunctionKey是一个整数.

How do I set an NSButton's keyEquivalent (which is a String type) to the down arrow key in Swift? NSDownArrowFunctionKey is an Int.

推荐答案

此页面解决了这一确切问题.他们提供的示例是用Objective-C编写的，Swift等效项如下:

This page in Apple's documentation addresses this exact issue. The example they provide is written in Objective-C, the Swift equivalent is as follows:

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var button: NSButton!

    func applicationDidFinishLaunching(aNotification: NSNotification) {

        var array = [unichar(NSDownArrowFunctionKey)]
        button.keyEquivalent = NSString(characters: array, length: 1)
    }
}

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