NSDateComponents *components = [NSCalendar.currentCalendar components:NSUIntegerMax fromDate:self];
components:NSUIntegerMax 这样写的合理性在哪里?
NSDateComponents *components = [NSCalendar.currentCalendar components:NSUIntegerMax fromDate:self];
components:NSUIntegerMax 这样写的合理性在哪里?