ios - 相对 NSDate 与结果 TheDayBeforeYesterday,Yesterady,Today,Tomorrow

Question

我想检查日期并以 4 格式获取结果 TheDayBeforeYesterday,Yesterady,Today,Tomorrow。

我有一个日期，我想将该日期与当前日期进行比较。

现在我已经这样做了，但这只是给我正数的一天，所以我无法知道日期已经过去了，或者它仍然会到那个日期。

-(void)getDateDiffrenceForBirthday:(NSString *)strOriginalDate  

{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"];
    NSDate *originalDate = [formatter dateFromString:strOriginalDate];

    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *components = [calendar components:NSDayCalendarUnit
                                               fromDate:originalDate
                                                 toDate:[NSDate date]
                                                options:0];

    NSLog(@"Days To Go %d",components.day);

}

Answer 1

您可以使用此功能。它格式化参数日期如下:

如果日期是明天、今天、昨天、前天，则返回相应的文本

如果日期小于一周前，返回工作日、日和月

所有其他日期以中等格式格式化

NSString* dateFormatted(NSDate* datetime){
if(datetime==nil){return nil;}

NSDate *todayWithTime=[NSDate date];

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *todayComponents=[gregorian components: (NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate: todayWithTime];
NSDate *tomorrow=[[NSDate alloc] initWithTimeInterval:86399 sinceDate:[gregorian dateFromComponents: todayComponents]];

NSDateComponents * interval = [gregorian components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:datetime toDate:tomorrow options:0];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:CurrentLocale()];

NSString *result;
if((interval.year==0)&&(interval.month==0)){
    if(interval.day==-1){
        result=NSLocalizedString(@"Tomorrow", @"");
    }else if(interval.day==0){
        result=NSLocalizedString(@"Today", @"");
    }else if(interval.day==1){
        result=NSLocalizedString(@"Yesterday", @"");
    }else if(interval.day==2){
        result=NSLocalizedString(@"The Day Before Yesterday", @"");
    }else if(interval.day<7){
        [dateFormatter setDateFormat:@"EEEE, d MMMM"];
        result = [dateFormatter stringFromDate:datetime];
    }else{
        [dateFormatter setDateStyle:NSDateFormatterMediumStyle];
        result = [dateFormatter stringFromDate:datetime];
    }
}else{
    [dateFormatter setDateStyle:NSDateFormatterMediumStyle];
    result = [dateFormatter stringFromDate:datetime];
}
return result;
}