“无效模式 'kCFRunLoopCommonModes' ..."是什么意思? [英] What does "invalid mode 'kCFRunLoopCommonModes' ..."mean?

问题描述

环境:版本 11.0 beta 3 (11M362v)

Environment: Version 11.0 beta 3 (11M362v)

全文如下:

invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific - break on _CFRunLoopError_RunCalledWithInvalidMode to debug. 
This message will only appear once per execution.
Hello World

此消息仅在我单击连接到操作的 UISwitch 按钮时出现；在这里，打印Hello World".

显然，动作的行为不受影响.

作为比较，我在工具栏中创建了一个行为正常的 UIBarButtonItem.所以开关按钮有点可疑.

This message only appears when I click on a UISwitch button that is connected to an action; here, printing "Hello World".

Apparently the behavior of the action isn't affected.

As a comparison, I've created a UIBarButtonItem in the toolbar which behaves normally. So there's something fishy about the switch button.

问题:为什么会出现这种情况，这意味着什么?补救措施?

Question: why would this appear and what does it mean? Remedy?

推荐答案

我认为这是一个警告，Apple 应该自行修复它.即使在来自 WWDC19 的 this 示例项目中，也存在这个问题.表格的单元格中有一个 UISwitch.当我点击它时，会出现上述警告.

I think it's a warning that Apple should fix it itself. Even in this sample project which is from WWDC19 this problem exists. There is a UISwitch in a cell of a table. When I tap it, the mentioned warning is raised.

所以，在我看来，这是苹果应该处理的错误.

So, in my view, it is a bug that Apple should deal with.

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