如何比较/排序日期与目标C日期排列
问题描述:
请帮我...如何比较/排序日期与目标C日期排列
我存储当前系统日期中的变量myDate
即myDate = 11 Nov 2017
现在我想最后一个/上n
日期从myDate
。
例如: -n = 7
myDate - 7 => 05 Nov 17
现在,这里我得到日期1(currentDate) = 11 November 17
& & date2的(previous n date) = 05 November 17
我从我的核心数据,这给我取的数据这组日期:
(
"11 November 2017",
"10 November 2017",
"8 November 2017",
"5 November 2017",
"3 November 2017",
"1 November 2017"
)
现在我要存/取日期date1
和date2
在两者之间
所以最后我应该得到这个数组:(
"11 November 2017",
"10 November 2017",
"8 November 2017",
"5 November 2017"
)
我怎么能做到这一点,请帮助我。
答
@Aadi试试这个..
NSMutableArray *arrOutput = [[NSMutableArray alloc]init];
NSMutableArray *arrDates = [[NSMutableArray alloc]initWithObjects:@"11 November 2017",
@"10 November 2017",
@"8 November 2017",
@"5 November 2017",
@"3 November 2017",
@"1 November 2017", nil];
NSDateFormatter *df = [[NSDateFormatter alloc]init];
[df setDateFormat:@"dd MMMM yyyy"];
[df setTimeZone:[NSTimeZone localTimeZone]];
NSString *strCurrentDate = [df stringFromDate:[NSDate date]];
NSDate *currentDate = [df dateFromString:strCurrentDate];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
dayComponent.day = -7;
NSDate *lastWeek = [gregorian dateByAddingComponents:dayComponent toDate:[NSDate date] options:0];
for(int i=0; i<arrDates.count; i++)
{
NSDate *dateFormArray = [df dateFromString:[arrDates objectAtIndex:i]];
if ([dateFormArray compare:currentDate] == NSOrderedAscending && [dateFormArray compare:lastWeek] != NSOrderedAscending)
{
[arrOutput addObject:[arrDates objectAtIndex:i]];
}
}
NSLog(@"current date = %@",strCurrentDate);
NSLog(@"output = %@",arrOutput);
请帮我... – Aadi
是日期'NSString'或'NSDate'实例? – vadian
日期在NSString – Aadi