invalid mode 'kCFRunLoopCommonModes' provided

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

这个错误,可能是与xib或者storyboard有关,检查或者删除相关xib文件来排除问题

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