目录一、准备工作表结构部分表数据二、三种方式controller层构建树结构工具类（三种方式）执行结javascript果总结一、准备工作
I have a NSMutableArray I get by loading a plist into it. The date field comes in as a string and i want to change it into a nsdate. I can change an nsstring into an nsdate.
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