tap button cause app crash on side bar
问题 I have two view controllers, one is the home view, one is the side menu view; all of the objects and created with storyboard. there is a bar button 'item' on home view, when clicking it, it will invoke a custom segue, to slide out the side menu from left to right. So far so good. On side menu, there is a button to slide back to home view. However, I simply click the button, the app will terminated, Xcode does not print out the crash log overtime. I tried to add a breakpoint on (IBAction