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检查两个日期是否相隔一个月

nsdatecomponents nscalendar nsdate objective-c

1

bruno vignesh · 技术社区 · 7 年前

我想看看两个日期是否相隔一个月。我读到我应该使用这种方法 components:fromDate:toDate:options: NSCalendar

我的代码

#define FORMAT_DATE_TIME @"dd-MM-yyyy HH:mm"

NSDate *updateDate = [Utils getDateFromString:airport.updateOn withFormat:FORMAT_DATE_TIME];
NSDate *now = [NSDate date];
NSString *nowString = [Utils getStringFromDate:now withFormat:FORMAT_DATE_TIME];
now = [Utils getDateFromString:nowString withFormat:FORMAT_DATE_TIME];

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *comps = [calendar components:NSCalendarUnitMonth fromDate:updateDate toDate:now options:0];

NSLog(@"%ld", (long)[comps year]);
NSLog(@"%ld", (long)[comps month]);
NSLog(@"%ld", (long)[comps day]);

以下是日志:

(lldb)年份:9223372036854775807

(lldb)po now 2017-08-23 11:54:00+0000

(lldb)po更新日期2017-08-23 11:48:00+0000

2 回复 | 直到 7 年前

1

2

Deep Moradia 7 年前

下一行不包括年份( NSCalendarUnitYear )和白天( NSCalendarUnitDay )组件,仅月份( NSCalendarUnitMonth )包括组件。

NSDateComponents *components = [calendar components:NSCalendarUnitMonth fromDate:updateDate toDate:now options:0];

NSCalendarUnitYear公司 N日历日 获取[comps year]&[薪酬日]为0。

这样地:

NSDateComponents * components = [calendar components:NSCalendarUnitMonth |NSCalendarUnitYear|NSCalendarUnitDay fromDate:updateDate toDate:now options:0];

2

-1

Abdelahad Darwish 7 年前

你可以用这个

 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:FORMAT_DATE_TIME];
NSDate *updateDate  = [dateFormatter dateFromString:@"24-07-1990 15:20"];

NSDate *now = [NSDate date];


NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay;


NSDateComponents *comps = [calendar components:unitFlags fromDate:updateDate toDate:now options:0];


NSLog(@"%ld", (long)[comps year]);
NSLog(@"%ld", (long)[comps month]);
NSLog(@"%ld", (long)[comps day]);