当前日期是这个月的第几周
NSInteger weekNumInMonth = [self getWeekdayOrdinalInMonth];
DLog(@"weekNumInMonth:%ld",(long)weekNumInMonth);
if (weekNumInMonth == weekNum) {
for (int i = 1; i<= weekNum ; i++ )
{
muarray [weekNum -i] = [self getFirstAndLastdayinWeek];
_NumW ++;
}
}else if(weekNumInMonth < weekNum) {
for (int i = 1; i<= weekNumInMonth - 1; i++ )
{
_NumW ++;
muarray [weekNumInMonth - 1 - i] = [self getFirstAndLastdayinWeek];
}
_NumW =1;
for (int i = 0; i< weekNum - weekNumInMonth + 1; i++ )
{
muarray [weekNumInMonth - 1 + i ] = [self getFirstAndLastdayinWeek];
_NumW --;
}
}
// 当前日期是这个月的第几周
-(NSInteger)getWeekdayOrdinalInMonth{
NSString *date = @"2017-07-31";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd";
NSDate *nowDate = [dateFormatter dateFromString:date];
// NSDate *nowDate = [NSDate date];
// DLog(@"[self getMonthDate]: %@",[self getMonthDate]);
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comp = [calendar components: NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday | NSCalendarUnitDay |NSCalendarUnitWeekdayOrdinal fromDate:nowDate];
// 当前日期是这个月的第几周
NSInteger weekdayOrdinal = [comp weekdayOrdinal];
return weekdayOrdinal;
}
#pragma mark - 获取当前月
- (NSDate *)getMonthDate
{
NSDate *nowDate = [NSDate date];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comp = [calendar components: NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday | NSCalendarUnitDay fromDate:nowDate];
// 获取今天是周几
NSInteger weekDay = [comp weekday];
// 获取几天是几号
NSInteger day = [comp day];
// 计算当前日期和本周的星期一和星期天相差天数
long firstDiff,lastDiff;
if (weekDay == 1)
{
firstDiff = -31;
lastDiff = 0;
if (_NumM > 1) {
firstDiff = [calendar firstWeekday] - weekDay + 1 - ((_NumM)*31);
lastDiff = 31 - weekDay;
}
}
else
{
if(_NumM == 0)
{
firstDiff = [calendar firstWeekday] - weekDay + 1;
lastDiff = 31 - weekDay;
}else
{
firstDiff = [calendar firstWeekday] - weekDay + 1 - ((_NumM -1)*31);
lastDiff = 31 - weekDay;
}
}
NSDateComponents *firstDayComp = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:nowDate];
[firstDayComp setDay:day + firstDiff];
NSDate *firstDayOfWeek = [calendar dateFromComponents:firstDayComp];
// DLog(@"firstDayOfWeek: %@",firstDayOfWeek);
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd"];
// 本周第一天时间
NSString *firstDay = [formatter stringFromDate:firstDayOfWeek];
// return firstDay;
return firstDayOfWeek;
}
