如何在Swift中禁用macOS X的NSToolbar的按钮? [英] How to disable a button of a NSToolbar of macOS X in Swift?

问题描述

我想以编程方式启用和禁用macOS中NSToolBar的工具栏项目(按钮).我试图为ViewController控件拖动创建一个出口，但是Xcode不接受该放置.我该怎么办?

I would like to enable and disable programmatically a toolbar item (a button) of a NSToolBar in macOS. I tried to create an outlet to ViewController control-dragging but Xcode don't accept the drop. How can I do this?

我阅读了此问题关于带有Objective-C答案的类似问题，但我我是个初学者，不太了解如何在Swift中执行此操作.

I read this question about a similar question with Objective-C answers but I'm a beginner and can't understand well how to do this in Swift.

推荐答案

实现委托方法

override func validateToolbarItem(_ item: NSToolbarItem) -> Bool

例如，您可以通过itemIdentifier区分项目，并返回true启用和false禁用该项目

You can distinguish the items for example by the itemIdentifier and return true to enable and false to disable the item

文档提供了一个示例.

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