force reload calendar

[yurevich1]

how to force reload calendar for new frame? If I rotate iPad and pure change frame of calendar by
calendar.frame = newframe; with hidden calendar and unhide I can see incorrect size of elements. I can appear when calendar is not hidden.
Moreover, there is another bug: from time to time vertical spaces between vertical elements suddenly dissapear. I can't catch when but those bugs exist.

[WenchaoD]

Pls provide more details. Or make a demo which can 100% reproduce the issue and share a dropbox link.

[yurevich1]

A few hours later I found that the calendar is being updated while calendar.showsPlaceholders = NO; if I pure change frame of calendar by calendar.frame = newframe.

If I set a calendar.showsPlaceholders = YES; it doesn't redraw if I rotate the device. Please, notice somewhere. Because of inside your method
- (void)layoutSubviews
Calendar has got this line:
BOOL needsAdjustingBoundingRect = self.scope == FSCalendarScopeMonth && !_showsPlaceholders && !self.hasValidateVisibleLayout;
So, the callback
[self boundingRectWillChange:NO]; is not fired if calendar.showsPlaceholders = YES.