Attempted to modify the selection of an item in an out-of-bounds section (647) when there are only 647 sections. about fscalendar

[Aaqibali279]

I am getting same issue in production app, below is stack trace

[Aaqibali279]

@WenchaoD can you please check this issue

[SergeyKovalenko]

FSCalendar has a working range of dates minimumDate - maximumDate, by defaults it's 1970-01-01 and 2099-12-31
I noticed strange behavior of minimumDate calculation for some time zones (e.g. America/Mazatlan (GMT-7))

NSDate *newMin = [self.dataSourceProxy minimumDateForCalendar:self]?:[self.formatter dateFromString:@"1970-01-01"];
newMin = [self.gregorian dateBySettingHour:0 minute:0 second:0 ofDate:newMin options:0];

here newMin will be 1970-01-01 01:00:00 however for any other date an hour component will be set to 0 hours
(e.g. 1970-01-02 00:00:00)
Because of this, calculations like - (NSIndexPath *)indexPathForDate:(NSDate *)date scope:(FSCalendarScope)scope are broken and leads to crash on iOS 17

There is a way to change minimumDate by implementing dataSource method to avoid such behavior

/**
 * Asks the dataSource the minimum date to display.
 */
- (NSDate *)minimumDateForCalendar:(FSCalendar *)calendar;