- (void)topViewClicked; //主要是dismiss掉时间选择控制器
//获取到选中时间，并且dismiss掉时间选择控制器
- (void)sureButtonClicked:(NSDate *)date;

#pragma mark - XXDatePickerViewControllerDelegete
- (void)topViewClicked {
[self dismissViewControllerAnimated:YES completion:nil];
}

- (void)sureButtonClicked:(NSDate *)date {
[self dismissViewControllerAnimated:YES completion:nil];

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"yyyy-MM-dd";
NSString *dateString = [formatter stringFromDate:date];

NSLog(@"dateString = %@",dateString);
}