我遇到这样一种情况,tryNSAttributedString(data:data,options:[NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType],documentAttributes:nil)使应用程序崩溃。在控制台中它说:void_prepareForCAFlush(UIApplication*__strong)()断言失败该函数在extensionString中调用。当我在控制台中“po”值时:(lldb)poselfObfuscatedstring\n(lldb)podata`450bytescount:450p