real-e-party-iOS/YuMi/Tools/Date/NSDate+DateUtils.m

//
//  NSDate+DateUtils.m
//  YUMI
//
//  Created by YUMI on 2022/4/12.
//

#import "NSDate+DateUtils.h"

NSString * const kDateFormatYYYYMMDD = @"yyyy-MM-dd";
NSString * const kDateFormatYYMMDDTHHmmss = @"yyyy-MM-dd'T'HH:mm:ss";

@implementation NSDate (DateUtils)
+ (NSDateFormatter *)shareDateFormatter {
	static NSDateFormatter *currentFormatter = nil;
	static dispatch_once_t sharedDateFormatter_onceToken;
	dispatch_once(&sharedDateFormatter_onceToken, ^{
		if (!currentFormatter) {
			currentFormatter = [[NSDateFormatter alloc] init];
			[currentFormatter setDateFormat:kDateFormatYYYYMMDD];
			[currentFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
		}
	});
	return currentFormatter;
}

- (NSDate *)dateByAddingDays:(NSInteger)days {
	NSCalendar *calendar = [NSCalendar sharedCalendar];
	NSDateComponents *components = [[NSDateComponents alloc] init];
	[components setDay:days];
	return [calendar dateByAddingComponents:components toDate:self options:0];
}

- (NSDate *)dateByAddingSeconds:(NSInteger)seconds {
    NSCalendar *calendar = [NSCalendar sharedCalendar];
    NSDateComponents *components = [[NSDateComponents alloc] init];
    [components setSecond:seconds];
    return [calendar dateByAddingComponents:components toDate:self options:0];
}

- (NSInteger)daysBetween:(NSDate *)aDate {
	NSUInteger unitFlags = NSCalendarUnitDay;
	NSDate *from = [NSDate at_dateFromString:[self stringForYearMonthDayDashed]];
	NSDate *to = [NSDate at_dateFromString:[aDate stringForYearMonthDayDashed]];
	NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
	NSDateComponents *components = [calendar components:unitFlags fromDate:from toDate:to options:0];
	return labs([components day]) + 1;
}

- (NSString *) stringForYearMonthDayDashed {
	return [self stringForFormat:kDateFormatYYYYMMDD];
}

- (NSString *)stringForFormat:(NSString *)format {
	if (!format) {
		return nil;
	}
	
	NSDateFormatter *formatter = [NSDate shareDateFormatter];
	[formatter setDateFormat:format];
	
	NSString *timeStr = [formatter stringFromDate:self];
	return timeStr;
}

+ (NSDate *)at_dateFromString:(NSString *)dateString {
	NSDateFormatter *dateFormatter = [self shareDateFormatter];
	if (dateString.length > kDateFormatYYYYMMDD.length) {
		[dateFormatter setDateFormat:kDateFormatYYMMDDTHHmmss];
	} else {
		[dateFormatter setDateFormat:kDateFormatYYYYMMDD];
	}
	NSDate *date = [dateFormatter dateFromString:dateString];
	if (!date) {
		date = [NSDate date];
	}
	return date;
}

+ (NSString *)stringFromDate:(NSDate *)date {
	NSDateFormatter * currentFormatter = [[NSDateFormatter alloc] init];
	if ([self isDateInToday:date]) {
		[currentFormatter setDateFormat:@"HH:mm"];
	} else {
		if (date.timeIntervalSince1970 > 0) {
			[currentFormatter setDateFormat:YMLocalizedString(@"DateUtils0")];
		} else{
			[currentFormatter setDateFormat:YMLocalizedString(@"DateUtils1")];
		}
	}
	NSString *dateString = [currentFormatter stringFromDate: date];
	return dateString;
}



+(BOOL)isDateInToday:(NSDate *)date{

	NSTimeInterval secondsPerDay = 24 * 60 * 60;
	NSDate *today = [[NSDate alloc] init];
	NSDate *tomorrow, *yesterday;

	tomorrow = [today dateByAddingTimeInterval: secondsPerDay];
	yesterday = [today dateByAddingTimeInterval: -secondsPerDay];

	// 10 first characters of description is the calendar date:
	NSString * todayString = [[today description] substringToIndex:10];
	NSString * yesterdayString = [[yesterday description] substringToIndex:10];
	NSString * tomorrowString = [[tomorrow description] substringToIndex:10];
	NSString * dateString = [[date description] substringToIndex:10];
	if ([dateString isEqualToString:todayString]){
		return YES;
	} else {
		return NO;
	}
}

+(NSString *)getNowTimeTimestamp{

	NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

	NSTimeInterval a=[dat timeIntervalSince1970];

	NSString*timeString = [NSString stringWithFormat:@"%0.f", a];//转为字符型

	return timeString;
}

+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format{



 NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
 [formatter setDateStyle:NSDateFormatterMediumStyle];

 [formatter setTimeStyle:NSDateFormatterShortStyle];

 [formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制
 NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];
 NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];
 return confromTimespStr;
}
#pragma mark - 将某个时间戳转化成 时间
+ (NSString *)timestampSwitchTime:(NSInteger)timestamp formatter:(NSString *)format{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    [formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制
    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
    [formatter setTimeZone:timeZone];
    NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];
    /// 在当前时间，后退30分钟 = 1800
//    confromTimesp = [confromTimesp dateByAddingTimeInterval:-1800];
    NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];
    return confromTimespStr;
}
+ (NSInteger)pleaseInsertStarTimeo:(NSString *)time1 andInsertEndTime:(NSString *)time2{
    // 1.将时间转换为date
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat = @"YYYY-MM-dd hh:mm:ss";
    NSDate *date1 = [formatter dateFromString:time1];
    NSDate *date2 = [formatter dateFromString:time2];
    // 2.创建日历
    NSCalendar *calendar = [NSCalendar currentCalendar];
//    NSCalendarUnit type = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSCalendarUnit type = NSCalendarUnitSecond;
    // 3.利用日历对象比较两个时间的差值
    NSDateComponents *cmps = [calendar components:type fromDate:date1 toDate:date2 options:0];
    // 4.输出结果
//    NSLog(@"两个时间相差%ld年%ld月%ld日%ld小时%ld分钟%ld秒", cmps.year, cmps.month, cmps.day, cmps.hour, cmps.minute, cmps.second);
    return cmps.second;
}
+ (NSString *)getCurrentTimeWithFormat:(NSString *)format{
    NSDate *now = [NSDate date];
     NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
     formatter.dateFormat = format;
     NSString *dateStr = [formatter stringFromDate:now];
 return  dateStr;
}
@end

@implementation NSCalendar (Pick)

+ (instancetype)sharedCalendar
{
	static id instance;
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		instance = [NSCalendar currentCalendar];
	});
	return instance;
}
@end