I have solved the problem.I was the cause of the problem within a certain component override the forwardInvocation method, and modified the methodSignature compulsory within methodSignatureForSelector method. And I found that when viewing the view hierarchy, the system also has call methodSignatureForSelector method, which can lead to can't see the view hierarchy

@logicat I have the same problem as you. Have you found the reason?Error Domain=NSCocoaErrorDomain Code=512 "wei neng cun chu gai wen jian。" UserInfo={NSUserStringVariant=Folder}。 And @eskimo it‘s a system problem? I don't have any ideas about this.