检查NSDate是否在下周

// 获取当前日期
NSDate *currentDate = [NSDate date];

// 创建NSCalendar对象
NSCalendar *calendar = [NSCalendar currentCalendar];

// 获取当前日期的NSDateComponents表示
NSDateComponents *currentComponents = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:currentDate];

// 设置下周的第一天
NSDateComponents *nextWeekComponents = [[NSDateComponents alloc] init];
nextWeekComponents.weekdayOrdinal = 1;

// 将NSDateComponents转换为NSDate对象
NSDate *nextWeekFirstDay = [calendar dateFromComponents:nextWeekComponents];

// 比较给定日期与下周的第一天
NSComparisonResult result = [currentDate compare:nextWeekFirstDay];

if (result == NSOrderedAscending) {
    NSLog(@"给定日期在下周之前");
} else if (result == NSOrderedSame) {
    NSLog(@"给定日期是下周的第一天");
} else {
    NSLog(@"给定日期在下周之后");
}