昨晚五点半左右，豫园发生一起4岁男孩头被卡进九曲桥石柱的案件，男孩的家长和围观群众马上报警，在消防队员的帮助下，迅速对现场进行了封闭管理，疏散周围的群众以后，消防员一边安抚孩子的情绪，一边想办法对桥上的
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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