ios 错误 _BSMachError: (os/kern) 在收到有关 CloudKit 记录添加的远程通知后的无效能力 (20)
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Error _BSMachError: (os/kern) invalid capability (20) after receiving remote notification on CloudKit record addition
提问by vomako
When I receive a remote notification on a record addition (didReceiveRemoteNotification called), I get the following error message:
当我收到关于记录添加的远程通知（didReceiveRemoteNotification 调用）时，我收到以下错误消息：
_BSMachError: (os/kern) invalid capability (20)
_BSMachError: (os/kern) 无效能力 (20)
I've already tried to find out more about this in forums and via Google but I could not find any helpful advice that applies to my situation.
我已经尝试在论坛和谷歌中找到更多关于此的信息，但我找不到任何适用于我的情况的有用建议。
What does the error message mean? What can I do about it?
错误信息是什么意思？我该怎么办？
回答by davidey
I just experienced this error. I was in a UIAlertAction block; when the block exited the error occurred (BTW the parent UIAlertViewControllerwas created in a dispatch_async blockso was I guess off main thread.
我刚刚经历了这个错误。我在一个UIAlert动作块中；当块退出时发生错误（顺便说一句，父级UIAlertViewController是在dispatch_async block主线程中创建的，所以我猜是主线程。
Anyway, I wrapped the action code itself in
无论如何，我将操作代码本身包装在
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self handleActionForElement:thisType];
});
and error went away. Your mileage may vary!
错误消失了。你的旅费可能会改变！
回答by cwgso
For Swift 5, I ended up with:
对于 Swift 5，我最终得到：
func alertAction() {
DispatchQueue.main.async {
//perform code
}
}
回答by Svitlana
Thank you very much, I had the same issue on swift
非常感谢，我在swift上遇到了同样的问题
So I've resolved it by putting code in main thread
所以我通过在主线程中放置代码来解决它
func alertAction() {
dispatch_async(dispatch_get_main_queue()) {
//perform code
}
}
回答by Sunil
Had same issue. I was trying to present a custom view on top of a presented view controller of third party framework.
有同样的问题。我试图在第三方框架的呈现视图控制器之上呈现自定义视图。
Resolved by moving the presentation logic to my view controller
通过将表示逻辑移动到我的视图控制器来解决
