单击选项卡栏控制器时，应用程序崩溃
[英]App Crashes when I click Tab Bar Controller
问题描述
I'm working my way through Stanford's iOS 7 course and I'm stuck at Task 1 on Assignment 4. 
我正在通过斯坦福大学的iOS 7课程进行学习，但仍处于作业4的任务1上。
I linked two scenes via CTRL + click to a Tab Bar Controller. 我通过CTRL +单击将两个场景链接到选项卡栏控制器。 I'll call them Scene A and Scene B. 我称它们为场景A和场景B。
If I link Scene A first, the app loads and does what it's supposed to...until I click the tab for Scene B, at which point the app crashes with the following exception: 如果我首先链接场景A，则该应用程序将加载并执行应有的操作...直到单击场景B的选项卡，这时该应用程序崩溃，但出现以下异常：
2014-06-25 13:31:12.255 Matchismo[4976:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSRegularExpression enumerateMatchesInString:options:range:usingBlock:]: nil argument'
If I link Scene B first, the app crashes out of the gate, despite no compiler errors. 如果我先链接场景B，尽管没有编译器错误，该应用程序也会崩溃。 Both scenes have a view controller set for them. 这两个场景都为它们设置了一个视图控制器。 Scene B's view controller is a subclass of Scene A's view controller. 场景B的视图控制器是场景A的视图控制器的子类。
Where should I be looking for the problem? 我应该在哪里寻找问题？
1 个解决方案
解决方案1
0 2014-06-25 19:06:45
Always post the error message with your question. 始终将错误消息与您的问题一起发布。 Did you google your error? 您是否用Google搜索了错误？ Follow this link, 点击此链接，
NSRegularExpression enumerateMatchesInString:options:range:usingBlock: giving a null result? NSRegularExpression enumerateMatchesInString：options：range：usingBlock：给出空结果吗？
I believe your error is not related to your tab view controller, but what's inside your view B. They're not empty, right? 我相信您的错误与您的标签视图控制器无关，但是视图B里面有什么。它们不是空的，对不对？
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