获取全球当前所有时区的当前时间TestTimeZone，精选ios编程学习源码，很好的参考资料。-The current time TestTimeZone get the current global all time zones, selection of learning IOS programming source code, a good reference.

日历控件，多种风格，实现不同时区的转换，仅供参考-Calendar controller, a variety of styles，achieve the conversion of different regions