通过日期求星期
-(NSString*)fromDateToWeek:(NSString*)selectDate
{
NSInteger yearInt = [selectDate substringWithRange:NSMakeRange(0, 4)].integerValue;//取第0~4位
NSInteger monthInt = [selectDate substringWithRange:NSMakeRange(4, 2)].integerValue;//取第4位的后两位
NSInteger dayInt = [selectDate substringWithRange:NSMakeRange(6, 2)].integerValue;//取第6位的后两位
int c = 20;//世纪
long int y = yearInt -1;//年
long int d = dayInt;
long int m = monthInt;
int w =(y+(y/4)+(c/4)-2*c+(26*(m+1)/10)+d-1)%7;
NSString *weekDay = @"";
switch (w) {
case 0:
weekDay = @"星期日";
break;
case 1:
weekDay = @"星期一";
break;
case 2:
weekDay = @"星期二";
break;
case 3:
weekDay = @"星期三";
break;
case 4:
weekDay = @"星期四";
break;
case 5:
weekDay = @"星期五";
break;
case 6:
weekDay = @"星期六";
break;
default:
break;
}
return weekDay;
}
获取当前年月日,星期
-(int)getCurrentTimeWith:(State)state
{
NSDate* date = [NSDate date];
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* comps = [calendar components:(NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSWeekdayCalendarUnit) fromDate:date];
switch (state) {
case year:{
return [comps year];
}
break;
case month:{
return [comps month];
break;
}
case day:{
return [comps day];
break;
}
case week:{
return [comps weekday]-1>0?[comps weekday]-1:7;
break;
}
default:
break;
}
}
h.
#import <UIKit/UIKit.h>
#import "InfoView.h"
typedef enum{
year=0,
month,
day,
week
}State;
//似乎是个可以获得日历属性的方法
NSCalendar日历