Question

我有一个日期组件说birthdayComponent（它有月和日），我想检查它是否位于其他组件之间..说（beginDaYComponent和endDayComponent）。

我想检查我的生日成分是否介于这两个日期之间..？我怎样才能实现这个目标，因为我还必须考虑2月29日的边界情况，并且我将endDayCompnents值设为3个月和1个日。您可以查看下面的代码以获取更多信息。

 NSDateFormatter *dateFormat = [NSDateFormatter new];
    [dateFormat setDateFormat:@"yyyy-MM-dd"];

    NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
    NSDateComponents *beginDayComponent = [[NSDateComponents alloc] init];
    NSDateComponents *endDayComponent = [[NSDateComponents alloc] init];

    NSCalendar *theCalendar = [NSCalendar currentCalendar];
    NSMutableArray* birthdayFitlerArray = [NSMutableArray new];

    for (NSString* dateString in birthdaysArray)
    {
        NSDate* birthdayDate = [dateFormat dateFromString:dateString];

        dayComponent.day = -1;
        NSDate* beginDate = [theCalendar dateByAddingComponents:dayComponent toDate:currentLeg.date options:0];

        dayComponent.day = 1;
        NSDate* endDate = [theCalendar dateByAddingComponents:dayComponent toDate:currentLeg.date options:0];

        beginDayComponent = [theCalendar  components:(NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:beginDate];
        endDayComponent = [theCalendar  components:(NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:endDate];

        NSDateComponents* birthdayComponents = [theCalendar  components:(NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:birthdayDate];

}

更新

我想省略日期的YEAR组件。

Answer 1

创建要用作上限和下限的两个NSDate对象。

然后使用NSDate的比较方法来查看您的日期是否在两个日期之间。您需要使用compare方法两次。查看compare method's documentation：

接收者和另一个日子完全相同，NSOrderedSame

接收者的时间晚于anotherDate，NSOrderedDescending

接收者的时间早于另一个日期，NSOrderedAscending。

Answer 2

NSDateComponents *firstDayDateComponents = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:randomdate];
[firstDayDateComponents setDay:1]; // set what you want here
[firstDayDateComponents setHour:0];
[firstDayDateComponents setMinute:0];

NSComparisonResult result = [randomdate compare:date_today];

if ( result == NSOrderedAscending) // if today's date is bigger than randomdate)
{
    // do stuff here
}

我认为从这里开始非常简单：）

Answer 3

NSDate *startDate = …;
NSDate *endDate = …;   // make sure endDate is later than startDate
NStimeInterVal endInterval;

[[NSCalendar currentCalendar] rangeOfUnit:NSDayCalendarUnit startDate:&startDate interval:NULL forDate:startDate];
[[NSCalendar currentCalendar] rangeOfUnit:NSDayCalendarUnit startDate:&endDate interval:&endInterval forDate:endDate];
endDate = [endDate dateByAddingTimeInterval:endInterval-0.001];

这将在默认时区创建时间0:00的开始日期和23：59：59.999的结束

现在使用比较方法

if ([givenDate compare:startDate] == NSOrderedAscending){
     //date is before both dates
} else if ([givenDate compare:endDate] == NSOrderedDescending){
    // date lies after both dates
} else {
 //givenDate lies between both dates.
}

显而易见，您想要查看任何一年。只需将年份设置为一年 - 如1 - 用于比较所有相关日期。

NSDateComponents *comps = [aCalendar components:(NSUIntegerMax - NSYearCalendarUnit ) fromDate:date];
comps.year = 1;
NSDate *year1Date = [aCalendar dateFromComponents:comps];

NSDate *startDate = …;
NSDate *endDate = …;   // make sure endDate is later than startDate
NStimeInterVal endInterval;

NSDateComponents *comps = [aCalendar components:(NSUIntegerMax - NSYearCalendarUnit ) fromDate:startDate];
comps.year = 1;
NSDate *year1StartDate = [aCalendar dateFromComponents:comps];

comps = [aCalendar components:(NSUIntegerMax - NSYearCalendarUnit ) fromDate:endDate];
comps.year = 1;
NSDate *year1EndDate = [aCalendar dateFromComponents:comps];

comps = [aCalendar components:(NSUIntegerMax - NSYearCalendarUnit ) fromDate:givenDate];
comps.year = 1;
NSDate *year1givenDate = [aCalendar dateFromComponents:comps];


[[NSCalendar currentCalendar] rangeOfUnit:NSDayCalendarUnit startDate:&year1StartDate interval:NULL forDate:year1StartDate;
[[NSCalendar currentCalendar] rangeOfUnit:NSDayCalendarUnit startDate:&endDate interval:&endInterval forDate:endDate];
endDate = [endDate dateByAddingTimeInterval:endInterval-0.001];

if ([year1givenDate compare:year1StartDate] == NSOrderedAscending){
     //date is before both dates
} else if ([year1givenDate compare:year1EndDate] == NSOrderedDescending){
    // date lies after both dates
} else {
 //givenDate lies between both dates.
}

Answer 4

非常简单。您可以使用laterDate: NSDate或earlierDate:和laterDate:两种方法。请阅读有关这些方法的说明。

// 1. 
NSDate *firstDate, *secondDate, *thirdDate;

if ([firstDate laterDate:secondDate] == secondDate &&
    [secondDate laterDate:thirdDate] == thirdDate)
{
    /// secondDate is between first and third date.
}

// 2.
if ([secondDate earlierDate:firstDate] == firstDate &&
    [secondDate laterDate:thirdDate] == thirdDate)
{
    /// secondDate is between first and third date.
}

如何在iOS中检查一天是否介于两天之间...？

4 个答案: