#import <Foundation/Foundation.h>

@interface NSDate (XMGExtension)

/**  */

// @property (nonatomic, copy) NSString *name;

//- (NSString *)name;

//- (void)setName:(NSString *)name;

/**

 *  是否为今年

 */

- (BOOL)isThisYear;

/**

 *  是否为今天

 */

- (BOOL)isToday;

/**

 *  是否为昨天

 */

- (BOOL)isYesterday;

/**

 *  是否为明天

 */

- (BOOL)isTomorrow;

@end

#import "NSDate+XMGExtension.h"

@implementation NSDate (XMGExtension)

- (BOOL)isThisYear

{

    // 判断self这个日期是否为今年

    NSCalendar *calendar = [NSCalendar calendar];

    // 年

    NSInteger selfYear = [calendar component:NSCalendarUnitYear fromDate:self];

    NSInteger nowYear = [calendar component:NSCalendarUnitYear fromDate:[NSDate date]];

    return selfYear == nowYear;

}

//- (BOOL)isThisYear

//{

//    NSDateFormatter *fmt = [[NSDateFormatter alloc] init];

//    fmt.dateFormat = @"yyyy";

//

//    // 年

//    NSString *selfYear = [fmt stringFromDate:self];

//    NSString *nowYear = [fmt stringFromDate:[NSDate date]];

//

//    return [selfYear isEqualToString:nowYear];

//}

- (BOOL)isToday

{

    // 判断self这个日期是否为今天

    NSCalendar *calendar = [NSCalendar calendar];

    // 获得年月日元素

    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;

    NSDateComponents *selfCmps = [calendar components:unit fromDate:self];

    NSDateComponents *nowCmps = [calendar components:unit fromDate:[NSDate date]];

    return selfCmps.year == nowCmps.year

    && selfCmps.month == nowCmps.month

    && selfCmps.day == nowCmps.day;

}

//- (BOOL)isToday

//{

//    // 判断self这个日期是否为今天

//    NSDateFormatter *fmt = [[NSDateFormatter alloc] init];

//    fmt.dateFormat = @"yyyyMMdd";

//

//    NSString *selfString = [fmt stringFromDate:self];

//    NSString *nowString = [fmt stringFromDate:[NSDate date]];

//

//    return [selfString isEqualToString:nowString];

//}

- (BOOL)isYesterday

{

    // 判断self这个日期是否为昨天

    // self == 2015-10-31 23:07:08 -> 2015-10-31 00:00:00

    // now  == 2015-11-01 14:39:20 -> 2015-11-01 00:00:00

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

    fmt.dateFormat = @"yyyyMMdd";

    NSString *selfString = [fmt stringFromDate:self]; //

    NSString *nowString = [fmt stringFromDate:[NSDate date]]; //

    NSDate *selfDate = [fmt dateFromString:selfString]; // 2015-10-31 00:00:00

    NSDate *nowDate = [fmt dateFromString:nowString]; // 2015-11-01 00:00:00

    NSCalendar *calendar = [NSCalendar calendar];

    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;

    NSDateComponents *cmps = [calendar components:unit fromDate:selfDate toDate:nowDate options:];

    return cmps.year ==

    && cmps.month ==

    && cmps.day == ;

}

- (BOOL)isTomorrow

{

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

    fmt.dateFormat = @"yyyyMMdd";

    NSString *selfString = [fmt stringFromDate:self]; //

    NSString *nowString = [fmt stringFromDate:[NSDate date]]; //

    NSDate *selfDate = [fmt dateFromString:selfString]; // 2015-10-31 00:00:00

    NSDate *nowDate = [fmt dateFromString:nowString]; // 2015-11-01 00:00:00

    NSCalendar *calendar = [NSCalendar calendar];

    NSCalendarUnit unit = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;

    NSDateComponents *cmps = [calendar components:unit fromDate:selfDate toDate:nowDate options:];

    return cmps.year ==

    && cmps.month ==

    && cmps.day == -;

}

#import <Foundation/Foundation.h>

@interface NSCalendar (XMGExtension)

+ (instancetype)calendar;

@end

#import "NSCalendar+XMGExtension.h"

@implementation  (XMGExtension)

+ (instancetype)calendar

{

    if ([NSCalendar respondsToSelector:@selector(calendarWithIdentifier:)]) {

        return [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];

    } else {

        return [NSCalendar currentCalendar];

    }

}

@end