iOS判断日期A是否在日期B到日期C之间

方法一： 可以用nsdate 的 timeIntervalSince1970 方法把时间转换成时间戳进行比较，这里timeIntervalSince1970返回的是NSTimeInterval(double)类型，直接比较就可以了

方法二：使用nsdate的compare方法实现

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- (BOOL)date:(NSDate*)date isBetweenDate:(NSDate*)beginDate andDate:(NSDate*)endDate

{

    if ([date compare:beginDate] == NSOrderedAscending)

        return NO;

     

    if ([date compare:endDate] == NSOrderedDescending)

        return NO;

     

    return YES;

}

方法三：

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NSCalendar *calendar= [NSCalendar currentCalendar];

NSInteger desiredComponents= (NSDayCalendarUnit | NSMonthCalendarUnit);

NSDateComponents *firstComponents= [calendar components:desiredComponents fromDate:Date1];

NSDateComponents *secondComponents= [calendar components:desiredComponents fromDate:Date2];

NSDate *firstWOYear= [calendar dateFromComponents:firstComponents];

NSDate *SecondWOYear = [calendar dateFromComponents:secondComponents];

NSComparisonResult result= [firstWOYear compare:SecondWOYear];

if (result== NSOrderedAscending) { 

 

} else if (result== NSOrderedDescending) {

 

}  else { 

 

}