ios - Making a Calendar. Year view is really slow. Lots of subviews - ios

Question

I'm making a calendar and the year view in particular, and understandably, is quite slow when coming into view.
The year view is simply a UICollectionView, and each month is a custom UICollectionViewCell XIB. The month has a title UILabel, and 7 dayName UILabels, and 42 dayNumber UILabels.
That's a total of 50 UILabels per month X 12. Aieesh...
How do other iOS calendar apps handle showing so many subviews without degradation in performance? The performance hit is mainly when swiping this view to the next and previous years. As the view is sliding in, the collection view is propagating the cells, causing the slow-down. I could hold off on populating the cells until the scrolling has stopped, but I'd really like to not show a white view as it's scrolling into the window.
Edit* As requested - my cellForRow method:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
NSIndexPath *indexPathPlusOne = [NSIndexPath indexPathForRow:indexPath.row + 1 inSection:indexPath.section];
EICalendarYearViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"EICalendarYearViewCell" forIndexPath:indexPath];
if (_datesLoaded == YES)
{
//Get First Day in Month
NSMutableArray *arrayForDatesInMonth = [_dictHoldingArrayForEachMonth objectForKey:[NSNumber numberWithLong:indexPathPlusOne.row]];
NSDate *firstDayInMonth = arrayForDatesInMonth[0];
NSDateComponents* comp = [[NSCalendar currentCalendar] components:(NSCalendarUnitWeekday) fromDate:firstDayInMonth];
//setting month label
switch (indexPathPlusOne.row) {
case 1:
cell.labelTitle.text = #"January";
break;
case 2:
cell.labelTitle.text = #"February";
break;
case 3:
cell.labelTitle.text = #"March";
break;
case 4:
cell.labelTitle.text = #"April";
break;
case 5:
cell.labelTitle.text = #"May";
break;
case 6:
cell.labelTitle.text = #"June";
break;
case 7:
cell.labelTitle.text = #"July";
break;
case 8:
cell.labelTitle.text = #"August";
break;
case 9:
cell.labelTitle.text = #"September";
break;
case 10:
cell.labelTitle.text = #"October";
break;
case 11:
cell.labelTitle.text = #"November";
break;
case 12:
cell.labelTitle.text = #"December";
break;
default:
break;
}
//setting number of days in previous month to show.
long previousMonthDays = 0;
if (comp.weekday == 7)
{
previousMonthDays = 0;
}
else
{
previousMonthDays = comp.weekday - 1;
}
for (int i = 0; i < cell.arrayOfDayLabels.count; i++)
{
UILabel *labelDay = cell.arrayOfDayLabels[i];
//previous Month days
if (i <= previousMonthDays)
{
labelDay.text = #" ";
labelDay.textColor = [UIColor colorWithWhite:0.8 alpha:1.000];
}
//Actual days in current month
if (i >= previousMonthDays && i < previousMonthDays + arrayForDatesInMonth.count)
{
NSDate *dateForDay = arrayForDatesInMonth[i - previousMonthDays];
NSDateComponents *compsForDay = [[NSCalendar currentCalendar] components:NSCalendarUnitDay fromDate:dateForDay];
labelDay.text = [NSString stringWithFormat:#"%ld", (long)compsForDay.day];
labelDay.textColor = [UIColor darkGrayColor];
}
else
{
labelDay.text = #" ";
labelDay.textColor = [UIColor colorWithWhite:0.8 alpha:1.000];
}
}
}
else
{
for (int i = 0; i < cell.arrayOfDayLabels.count; i++)
{
UILabel *labelDay = cell.arrayOfDayLabels[i];
labelDay.text = #" ";
}
}
cell.layer.shouldRasterize = YES;
[cell.layer setRasterizationScale:3.0f];
return cell;
}
For rmaddy, a screenshot of the methods causing majority of slow-down.