SwiftUI 菜单按钮最初显示为禁用 [英] SwiftUI Menu Button Displayed as Disabled Initially

问题描述

在 macOS 上，SwiftUI 菜单按钮最初显示为禁用.单击它们后，它们会正常激活并正确显示.此代码复制了问题:

On macOS, SwiftUI Menu buttons appear initially disabled. Once you click on them, they activate as normal and display properly. This code replicates the problem:

Menu {
    Button("First") { }
    Button("Second") { }
} label: {
    Image(systemName: "gearshape.fill")
}
.padding()

最初看起来像这样:

然后点击按钮后:

• 预览显示正确，但正在运行的应用表现如上
• 菜单内容似乎不影响结果
• 尝试使用 .disabled(false) 在禁用状态下进行显式处理；没有快乐，因为它并没有真正被禁用

• Preview shows correctly, but a running app behaves as above
• The contents of the menu don't seem to affect the result
• Tried explicitly mucking with disabled state using .disabled(false); no joy since it isn't really disabled

我可以只设置图像的前景色，但我希望找出真正的问题.我错过了什么吗?

I could just set the foreground color of the image, but I was hoping to figure out the real problem. Am I missing something?

设置前景也不起作用.仍然明显被禁用.

Setting the foreground doesn't work either. Still visibly disabled.

推荐答案

这个错误(归档为 FB8976414)从 macOS 11.3 开始仍然存在.不过，我从 @kontiki 那里得到了一些解决方法的帮助.如果将 Button 与 Menu 一起包含，它会正确显示启用.不要问我为什么.您可以将 Button 设为零大小，这样它就不会影响您的布局，并在(如果?)错误得到修复时将其删除.

This bug (filed as FB8976414) remains as of macOS 11.3. I got some help from @kontiki on a workaround, though. If you include a Button along with the Menu, it displays properly enabled. Don't ask me why. You can make the Button zero-sized so it doesn't affect your layout and just remove it when (if?) the bug gets fixed.

-- 更新 --

从 macOS 11.4 开始，此技术不再有效.Menu 始终显示为禁用状态，直到被点击.我想如果你从好的方面看，至少它更一致！

As of macOS 11.4, this technique no longer works. The Menu always displays as disabled until it's clicked. I guess if you look on the bright side, at least it's more consistent!

-- --

HStack(spacing: 0) {
    Menu {
        Button("First") { }
        Button("Second") { }
    } label: {
        Image(systemName: "gearshape.fill")
    }

    Button("", action: {}).scaleEffect(x: 0, y: 0)
}

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