iOS 開發中獲取當前系統日期

     

   NSDate * senddate=[NSDate date];

        NSCalendar * cal=[NSCalendar currentCalendar];

        NSUInteger unitFlags=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;

        NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];

        NSInteger year=[conponent year];

        NSInteger month=[conponent month];

        NSInteger day=[conponent day];

        NSString * nsDateString= [NSString stringWithFormat:@"%4d/%2d/%2d/",year,month,day];