Fscalendar: Customize calendar header view

[qhu91it]

Hi.
How can I customize calendar header like this?
http://imgur.com/QfacNaC
my current
http://imgur.com/AOHJAHe
At now I only can change color, font...

I need a function return header at label so I can set attribute text to it like that

- (void)calendar:(FSCalendar *)calendar prepareHeaderView:(UIView *)headerView date:(NSDate *)date {
    UILabel *label = (UILabel *)headerView;
    // customize label here
}

or you can make a callback function for collectionview willDisplayCell so I can customize it before display.
Thanks you.

[lemanhtien]

@WenchaoD is there any chance this of this function ? I think that it will really greater if we can customize the header-view of calendar like customize header-view in UITableView