知道某个日期是在同一周(或年份或月份)中的最佳方式是什么,最好是使用扩展,并且只使用
Swift？
举个例子,在Objective-C中我有
- (BOOL)isSameWeekAs:(NSDate *)date {
NSDateComponents *otherDay = [[NSCalendar currentCalendar] components:NSCalendarUnitEra | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:self];
NSDateComponents *today = [[NSCalendar currentCalendar] components:NSCalendarUnitEra | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:date];
return ([today weekOfYear] == [otherDay weekOfYear] &&
[today year] == [otherDay year] &&
[today era] == [otherDay era]);
}
解决方法
您可以使用日历方法isDate(equalTo：granularity :)来检查它如下：
extension Date {
func isInSameWeek(date: Date) -> Bool {
return Calendar.current.isDate(self,equalTo: date,toGranularity: .weekOfYear)
}
func isInSameMonth(date: Date) -> Bool {
return Calendar.current.isDate(self,toGranularity: .month)
}
func isInSameYear(date: Date) -> Bool {
return Calendar.current.isDate(self,toGranularity: .year)
}
func isInSameDay(date: Date) -> Bool {
return Calendar.current.isDate(self,toGranularity: .day)
}
var isInThisWeek: Bool {
return isInSameWeek(date: Date())
}
var isInToday: Bool {
return Calendar.current.isDateInToday(self)
}
var isInTheFuture: Bool {
return Date() < self
}
var isInThePast: Bool {
return self < Date()
}
}
