封装用于解析NSDate的便利的类

此类可以从NSDate中解析出年份，月份，日期，时，分，秒，毫秒，足够用来做好多事情了，现提供源码如下：

以下是核心的类：

TimeInfo.h 与 TimeInfo.m

//
//  TimeInfo.h
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>
@class HumanTimeInfo;

@interface TimeInfo : NSObject

+ (HumanTimeInfo *)humanCanUnderstandFromDate:(NSDate *)date;

@end

//
//  TimeInfo.m
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import "TimeInfo.h"
#import "HumanTimeInfo.h"

static NSDateFormatter   *_dateFormatter;

@implementation TimeInfo

+ (void)initialize {
    if (self == [TimeInfo class]) {
        _dateFormatter            = [[NSDateFormatter alloc] init];
        _dateFormatter.locale     = [[NSLocale alloc] initWithLocaleIdentifier:@"en_GB"];
        _dateFormatter.timeZone   = [NSTimeZone timeZoneWithName:@"GMT"];
        _dateFormatter.dateFormat = @"yyyy:MM:dd:MMM:MMMM:HH:mm:ss:aa:EEE:EEEE:SSS"; // SSSS
    }
}

+ (HumanTimeInfo *)humanCanUnderstandFromDate:(NSDate *)date {
    if (date != nil) {
        NSArray *timeInfoArray = [[_dateFormatter stringFromDate:date] componentsSeparatedByString:@":"];
        HumanTimeInfo *info    = [HumanTimeInfo new];
        info.year              = timeInfoArray[0];
        info.mounth            = timeInfoArray[1];
        info.day               = timeInfoArray[2];
        info.enMounth          = timeInfoArray[3];
        info.fullEnMounth      = timeInfoArray[4];
        info.hour              = timeInfoArray[5];
        info.min               = timeInfoArray[6];
        info.sec               = timeInfoArray[7];
        info.amPm              = timeInfoArray[8];
        info.enWeakday         = timeInfoArray[9];
        info.fullWeakday       = timeInfoArray[10];
        info.mSec              = timeInfoArray[11];

        return info;
    } else {
        return nil;
    }
}

@end

人类能够理解的信息类：

HumanTimeInfo.h 与 HumanTimeInfo.m

//
//  HumanTimeInfo.h
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface HumanTimeInfo : NSObject

@property (nonatomic, strong) NSString *year;         // 2014
@property (nonatomic, strong) NSString *mounth;       // 10
@property (nonatomic, strong) NSString *day;          // 16
@property (nonatomic, strong) NSString *enMounth;     // Oct
@property (nonatomic, strong) NSString *fullEnMounth; // October
@property (nonatomic, strong) NSString *hour;
@property (nonatomic, strong) NSString *min;
@property (nonatomic, strong) NSString *sec;
@property (nonatomic, strong) NSString *amPm;         // 上午或者下午
@property (nonatomic, strong) NSString *enWeakday;
@property (nonatomic, strong) NSString *fullWeakday;
@property (nonatomic, strong) NSString *mSec;         // 毫秒

@end

//
//  HumanTimeInfo.m
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import "HumanTimeInfo.h"

@implementation HumanTimeInfo

@end

NSDate+CurrentTime.h 与 NSDate+CurrentTime.m

//
//  NSDate+CurrentTime.h
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>
@class HumanTimeInfo;

@interface NSDate (CurrentTime)

+ (HumanTimeInfo *)currentTime;
+ (HumanTimeInfo *)dateFrom:(NSDate *)date;

@end

//
//  NSDate+CurrentTime.m
//  ShowTime
//
//  Created by YouXianMing on 14-10-16.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import "NSDate+CurrentTime.h"
#import "HumanTimeInfo.h"
#import "TimeInfo.h"

@implementation NSDate (CurrentTime)

+ (HumanTimeInfo *)currentTime
{
    return [TimeInfo humanCanUnderstandFromDate:[NSDate date]];
}

+ (HumanTimeInfo *)dateFrom:(NSDate *)date
{
    return [TimeInfo humanCanUnderstandFromDate:date];
}

@end

使用的话，给出NSDate，然后解析出来，就是这么简单:)