yinmeng-ios/xplan-ios/Base/Tool/Date/NSDate+DateUtils.m

//
//  NSDate+DateUtils.m
//  xplan-ios
//
//  Created by 冯硕 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];
}

- (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 *)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 *)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;
}
@end

@implementation NSCalendar (Pick)

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