IOS 获取全年所有周的周一和周日

- (NSArray *)getAllWeekDate

{

NSDate *nowDate = [NSDate date];

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *comp = [calendar components: NSCalendarUnitWeekday | NSCalendarUnitWeekOfYear fromDate:nowDate];

// 获取今天是周几 (周一是2，周日是1)

NSInteger weekDay = [comp weekday];

//这周是今年的第几周(注意：第一周编号为1不为0)

NSInteger weekOfYear = [comp weekOfYear];

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

[formatter setDateFormat:@"yyyyMMdd"];

NSDate *date = [formatter dateFromString:[formatter stringFromDate:[NSDate date]]];

//这周的开始和结束时间 （注意：+1 -1 避开临界值）

NSDate *startdate = [date dateByAddingTimeInterval:24*3600*(2 - weekDay)+1];

NSDate *enddate = [date dateByAddingTimeInterval:24*3600*(9 - weekDay)-1];

NSMutableArray *dateArray = [[[NSMutableArray alloc] init] mutableCopy];

//一年52周  获取一年的所有周一和周日的日期(注意：第一周编号为1不为0)

for (int i = 1; i <= 52; i++) {

NSDate *startdate1 = [startdate dateByAddingTimeInterval:24*3600*7*(i-weekOfYear)];

NSDate *enddate1 = [enddate dateByAddingTimeInterval:24*3600*7*(i-weekOfYear)];

[dateArray addObject:@[startdate1,enddate1]];

}

return dateArray;

}

嘿嘿嘿，写下来，再用的时候不用写了。