+ (NSString *) getweekDayStringWithDate:(NSDate *) date

{

NSCalendar * calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; // 指定日历的算法

NSDateComponents *comps = [calendar components:NSWeekdayCalendarUnit fromDate:date];

// 1 是周日，2是周一 3.以此类推

NSNumber * weekNumber = @([comps weekday]);

NSInteger weekInt = [weekNumber integerValue];

NSString *weekDayString = @"(周一)";

switch (weekInt) {

case 1:

{

weekDayString = @"(周日)";

}

break;

case 2:

{

weekDayString = @"(周一)";

}

break;

case 3:

{

weekDayString = @"(周二)";

}

break;

case 4:

{

weekDayString = @"(周三)";

}

break;

case 5:

{

weekDayString = @"(周四)";

}

break;

case 6:

{

weekDayString = @"(周五)";

}

break;

case 7:

{

weekDayString = @"(周六)";

}

break;

default:

break;

}

return weekDayString;

}