最近，江西一所高校学生疑似在饭菜中吃出老鼠头的视频在网上被广为流传，结果6月3号晚上，涉事学校却发布通告，称饭菜中的异物经当事人确认是鸭脖，且当地的市场监管局也发布了声明，称经过初步判定系鸭脖，而网上的
The UISearchDisplayController is very handy and implementing search is pretty straightforward. However, I bump into problem when, in my app, I want to display search result with empty search string b
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