支持循环滚动的日期时间选择器，使用方便，装逼利器。^0^
dater=[[XFDaterView alloc]initWithFrame:CGRectZero];
dater.delegate=self;
[dater showInView:self.view animated:YES];
// [dater setSelectYear:2016 month:2 day:1 animated:YES];
// dater.dateViewType=XFDateViewTypeTime;
// [dater setSelectHour:20 miniute:8 second:56 animated:YES];