Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[
iOS开发使用StoryBoard拖的控件报这个错:Terminatingappduetouncaughtexception'NSUnknownKeyException',reason:'[setValue:forUndefinedKey:]:thisclassisnotkeyvaluecoding-compliantforthekeybottomLine2.'对于这个问题,我们应该第一眼就能看到