unsigned units=NSMonthCalendarUnit|NSDayCalendarUnit|NSYearCalendarUnit|NSWeekdayCalendarUnit;        NSCalendar *mycal=[[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];    NSDate *now=[NSDate date];    NSDateComponents *comp =[mycal components:units fromDate:now];    NSInteger month=[comp month];    NSInteger year =[comp year];    NSInteger day=[comp day];    NSCalendar *gregorian = [NSCalendar currentCalendar];    NSDateComponents *dateComps = [gregorian components:NSWeekdayCalendarUnit fromDate:now];    int daycount = [dateComps weekday] - 2;    NSDate *weekdaybegin=[now addTimeInterval:-daycount*60*60*24];    NSDate *weekdayend  =[now  addTimeInterval:(6-daycount)*60*60*24];    NSDateFormatter *df1=[[NSDateFormatter alloc]init];    NSLocale *mylocal=[[NSLocale alloc]initWithLocaleIdentifier:@"zh_CN"];    [df1 setLocale:mylocal];    [df1 setDateFormat:@"YYYY-MM-d"];        now=weekdaybegin;    comp=[mycal components:units fromDate:now];    month=[comp month];    year =[comp year];    day=[comp day];    NSString *date1=[[NSString alloc]initWithFormat:@"%d-%02d-%02d",year,month,day];//所要求的周一的日期    now=weekdayend;    comp=[mycal components:units fromDate:now];    month=[comp month];    year =[comp year];    day=[comp day];    NSString *date2=[[NSString alloc]initWithFormat:@"%d-%02d-%02d",year,month,day];//所要求的周日的日期