//
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// DateUtil.m
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// airtree
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//
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// Created by WindShan on 2016/11/17.
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// Copyright © 2016年 Gloria. All rights reserved.
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//
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#import "DateUtil.h"
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#define YMDFormat @"YYYY-MM-dd"
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#define YMDEHMFormat @"YYYY-MM-dd EEE HH:mm"
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#define YMDHMSFormat @"YYYY-MM-dd HH:mm:ss"
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static NSDateFormatter *s_formatterYMD = nil;
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static NSDateFormatter *s_formatterYMDEHM = nil;
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static NSDateFormatter *s_formatterYMDHMS = nil;
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@implementation DateUtil
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+ (NSDate *)adjustDateHour:(NSDate *)srcDate
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minHour:(NSUInteger)minHour
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maxHour:(NSUInteger)maxHour
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fitHour:(NSUInteger)fitHour
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{
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//参数有效性检查
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if (srcDate == nil) {
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return srcDate;
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}
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if (minHour >= 24 || maxHour >= 24 || fitHour >=24) {
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minHour %= 24;
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maxHour %= 24;
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fitHour %= 24;
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}
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NSInteger unitFlags = NSHourCalendarUnit;
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSDateComponents *componets = [calendar components:unitFlags fromDate:srcDate];
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NSInteger hour = [componets hour];
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if (hour <= minHour) {
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//(NSInteger)(fitHour-hour)*60*60：必须先转为NSInteger，否则无符号相减后的负数是自动转换为非常大的double类型
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srcDate = [srcDate dateByAddingTimeInterval:(NSInteger)(fitHour-hour)*60*60];
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}
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else if (hour >= maxHour) {
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srcDate = [srcDate dateByAddingTimeInterval:(24+fitHour-hour)*60*60];
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}
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return srcDate;
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}
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+ (NSString *)stringFromDate:(NSDate *)date
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formater:(NSDateFormatter * __strong *)formatter
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format:(NSString *)format
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{
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if (*formatter == nil) {
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*formatter = [[NSDateFormatter alloc] init];
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[*formatter setLocale:[NSLocale currentLocale]];
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[*formatter setTimeZone:[NSTimeZone timeZoneWithName:@"Asia/Shanghai"]];
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[*formatter setDateStyle:NSDateFormatterMediumStyle];
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[*formatter setTimeStyle:NSDateFormatterShortStyle];
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[*formatter setDateFormat:format];
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}
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return [*formatter stringFromDate:date];
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}
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+ (NSDate *)dateFromString:(NSString *)dateString
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formater:(NSDateFormatter * __strong *)formatter
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format:(NSString *)format
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{
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if (dateString.length <= 0) {
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return [NSDate date];
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}
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if (*formatter == nil) {
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*formatter = [[NSDateFormatter alloc] init];
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[*formatter setLocale:[NSLocale currentLocale]];
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[*formatter setTimeZone:[NSTimeZone timeZoneWithName:@"Asia/Shanghai"]];
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[*formatter setDateStyle:NSDateFormatterMediumStyle];
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[*formatter setTimeStyle:NSDateFormatterShortStyle];
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[*formatter setDateFormat:format];
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}
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return [*formatter dateFromString:dateString];
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}
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+ (NSString *)stringFromDateYMD:(NSDate *)date
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{
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return [DateUtil stringFromDate:date formater:&s_formatterYMD format:YMDFormat];
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}
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+ (NSDate *)dateFromStringYMD:(NSString *)dateString
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{
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return [DateUtil dateFromString:dateString formater:&s_formatterYMD format:YMDFormat];
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}
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+ (NSString *)stringFromDateYMDEHM:(NSDate *)date
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{
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return [DateUtil stringFromDate:date formater:&s_formatterYMDEHM format:YMDEHMFormat];
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}
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+ (NSDate *)dateFromStringYMDEHM:(NSString *)dateString
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{
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return [DateUtil dateFromString:dateString formater:&s_formatterYMDEHM format:YMDEHMFormat];
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}
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+ (NSString *)stringFromDateYMDHMS:(NSDate *)date
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{
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return [DateUtil stringFromDate:date formater:&s_formatterYMDHMS format:YMDHMSFormat];
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}
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+ (NSDate *)dateFromStringYMDHMS:(NSString *)dateString
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{
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return [DateUtil dateFromString:dateString formater:&s_formatterYMDHMS format:YMDHMSFormat];
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}
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+ (NSString *)getYear:(NSDate *)date
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{
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSDateComponents *comps = nil;
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/*
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// 年月日获得
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comps = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit |
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NSDayCalendarUnit
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fromDate:date];
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*/
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comps = [calendar components:NSYearCalendarUnit fromDate:date];
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NSString *year = [NSString stringWithFormat:@"%@", @([comps year])];
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return year;
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}
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+ (NSString *)getMonth:(NSDate *)date
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{
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSDateComponents *comps = nil;
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comps = [calendar components:NSMonthCalendarUnit fromDate:date];
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NSString *month = [NSString stringWithFormat:@"%@", @([comps month])];
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return month;
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}
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+ (NSString *)getDay:(NSDate *)date
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{
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NSCalendar *calendar = [NSCalendar currentCalendar];
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NSDateComponents *comps = nil;
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comps = [calendar components:
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NSDayCalendarUnit fromDate:date];
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NSString *day = [NSString stringWithFormat:@"%@", @([comps day])];
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return day;
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}
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+ (NSString *)stringFromLong:(long)date
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{
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NSDate *dateTime = [[NSDate alloc] initWithTimeIntervalSinceNow:date/1000];
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NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
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[formatter setTimeStyle:NSDateFormatterNoStyle];
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[formatter setDateStyle:NSDateFormatterMediumStyle];
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NSLocale *formatterLocal = [[NSLocale alloc] initWithLocaleIdentifier:@"en_us"];
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[formatter setLocale:formatterLocal];
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[formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
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NSString *dateString = [formatter stringFromDate:dateTime];
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return dateString;
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}
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//获取指定时间前n天的时间日期 2015-10-30
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+ (NSString *)stringFromOffDateYMD:(NSDate *)date dayCount:(int)day
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{
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NSTimeInterval time = day * 24 * 60 * 60;//n天的秒数
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//得到一年之前的当前时间（-：表示向前的时间间隔（即去年），如果没有，则表示向后的时间间隔（即明年））
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NSDate * lastDateTime = [date dateByAddingTimeInterval:time];
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return [DateUtil stringFromDateYMD:lastDateTime];
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}
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//是否是今天
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+ (BOOL)isToday:(NSString *)dateString
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{
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NSString *nowString = [DateUtil stringFromDateYMD:[NSDate date]];
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return [nowString isEqualToString:dateString];
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}
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@end
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