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seo整站优化推广,网站开发实现软硬件环境,在建设银行网站上买卖贵金属,淘宝app官网iOS开发-格式化时间显示刚刚几分钟前几小时前等在开发中经常遇到从服务端获取的时间戳，需要转换显示刚刚、几分钟前、几小时前、几天前、年月日等格式。主要用到了NSCalendar、NSDateComponents这两个类 NSString *result nil;NSCalendarUnit components (NSC…

iOS开发-格式化时间显示刚刚几分钟前几小时前等

在开发中经常遇到从服务端获取的时间戳，需要转换显示刚刚、几分钟前、几小时前、几天前、年月日等格式。

在这里插入图片描述

主要用到了NSCalendar、NSDateComponents这两个类

NSString *result = nil;NSCalendarUnit components = (NSCalendarUnit)(NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday|NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond);NSDateComponents *nowDateComponents = [[NSCalendar currentCalendar] components:components fromDate:timeNowDate];NSDateComponents *msgDateComponents = [[NSCalendar currentCalendar] components:components fromDate:anotherday];

一、NSCalendar与NSDateComponents

NSCalendar日历，支持日历的计算。
NSDateComponents 一个日期是有年月日时分秒组成的，components这个类的作用就是把日期拆分成单独的年、月、日、时、分、秒

假设有某个时间为customDate,类型为NSDate，如何知道改日期的具体年份、月、日呢。这个就要用到NSDateComponents：
NSDateComponents的方法

- (NSDateComponents *)components:(NSCalendarUnit)unitFlags 
fromDate:(NSDate *)date

unitFlags为枚举类型如下

typedef NS_OPTIONS(NSUInteger, NSCalendarUnit) {NSCalendarUnitEra                = kCFCalendarUnitEra,NSCalendarUnitYear               = kCFCalendarUnitYear,NSCalendarUnitMonth              = kCFCalendarUnitMonth,NSCalendarUnitDay                = kCFCalendarUnitDay,NSCalendarUnitHour               = kCFCalendarUnitHour,NSCalendarUnitMinute             = kCFCalendarUnitMinute,NSCalendarUnitSecond             = kCFCalendarUnitSecond,NSCalendarUnitWeekday            = kCFCalendarUnitWeekday,NSCalendarUnitWeekdayOrdinal     = kCFCalendarUnitWeekdayOrdinal,NSCalendarUnitQuarter            API_AVAILABLE(macos(10.6), ios(4.0), watchos(2.0), tvos(9.0)) = kCFCalendarUnitQuarter,NSCalendarUnitWeekOfMonth        API_AVAILABLE(macos(10.7), ios(5.0), watchos(2.0), tvos(9.0)) = kCFCalendarUnitWeekOfMonth,NSCalendarUnitWeekOfYear         API_AVAILABLE(macos(10.7), ios(5.0), watchos(2.0), tvos(9.0)) = kCFCalendarUnitWeekOfYear,NSCalendarUnitYearForWeekOfYear  API_AVAILABLE(macos(10.7), ios(5.0), watchos(2.0), tvos(9.0)) = kCFCalendarUnitYearForWeekOfYear,NSCalendarUnitNanosecond         API_AVAILABLE(macos(10.7), ios(5.0), watchos(2.0), tvos(9.0)) = (1 << 15),NSCalendarUnitCalendar           API_AVAILABLE(macos(10.7), ios(4.0), watchos(2.0), tvos(9.0)) = (1 << 20),NSCalendarUnitTimeZone           API_AVAILABLE(macos(10.7), ios(4.0), watchos(2.0), tvos(9.0)) = (1 << 21),
};

常用的类型说明

NSCalendarUnitEra                 -- 纪元单位。  
NSCalendarUnitYear                -- 年单位。
NSCalendarUnitMonth               -- 月单位。范围为1-12
NSCalendarUnitDay                 -- 天单位。范围为1-31
NSCalendarUnitHour                -- 小时单位。范围为0-24
NSCalendarUnitMinute              -- 分钟单位。范围为0-60
NSCalendarUnitSecond              -- 秒单位。范围为0-60
NSCalendarUnitWeekOfMonth         -- 月包含的周数。
NSCalendarUnitWeekOfYear          -- 年包含的周数。
NSCalendarUnitWeekday             -- 工作日单位。范围为1-7

fromDate对应的日期

//根据系统区域设置获取用户的当前日历
NSCalendar *calendar = [NSCalendar currentCalendar];
//获取对应包含年月日的日期组件
NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:customDate];
[components year];//年
[components month];//月
[components day];//日

二、实现获取时间戳与当前时间进行比对

从服务端获取的时间戳，需要转换显示刚刚、几分钟前、几小时前、几天前、年月日等格式。
例如显示刚刚

long dateTime = [anotherday timeIntervalSince1970];
long nowTimestamp = [timeNowDate timeIntervalSince1970];if ((dateTime-zeroTime)>0) { //今日if ((nowTimestamp - dateTime) <= 60) {//如果是一分钟内的消息，显示刚刚return @"刚刚";}return timeArr[3];
}

完整代码如下

#import “SDTimeFormatUtil.h”

@implementation SDTimeFormatUtil/**格式化时间@param timeStamp 时间秒数@return 字符串*/
+ (NSString *)timeFormaterWithTimeStamp:(long)timeStamp {@try {NSDate *anotherday = [NSDate dateWithTimeIntervalSince1970:timeStamp];NSDateFormatter *formatter = [[NSDateFormatter alloc]init];[formatter setDateFormat:@"yyyy-MM-dd-HH:mm"];NSDate *timeNowDate = [NSDate date];NSString *nowDate = [formatter stringFromDate:timeNowDate];NSArray *nowtimeArr = [nowDate componentsSeparatedByString:@"-"];NSString *nowYearStr = nowtimeArr[0];NSString *dateStr = [formatter stringFromDate:anotherday];NSArray *timeArr = [dateStr componentsSeparatedByString:@"-"];NSString *yearStr = timeArr[0];NSString *result = nil;NSCalendarUnit components = (NSCalendarUnit)(NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday|NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond);NSDateComponents *nowDateComponents = [[NSCalendar currentCalendar] components:components fromDate:timeNowDate];NSDateComponents *msgDateComponents = [[NSCalendar currentCalendar] components:components fromDate:anotherday];double OnedayTimeIntervalValue = 24*60*60;  //一天的秒数//为了判断当前时间是否为未来时间BOOL futureTime = ([anotherday timeIntervalSince1970]-[[NSDate date] timeIntervalSince1970]>0)?YES:NO;if (futureTime) {return [NSString stringWithFormat:@"%@/%@/%@",timeArr[0],timeArr[1],timeArr[2]];}int year = [yearStr intValue]-[nowYearStr intValue];if (year<0) {//过去（今年以前）return [NSString stringWithFormat:@"%@/%@/%@",timeArr[0],timeArr[1],timeArr[2]];}int zeroTime = [self zeroOfDate];long dateTime = [anotherday timeIntervalSince1970];long nowTimestamp = [timeNowDate timeIntervalSince1970];if ((dateTime-zeroTime)>0) { //今日if ((nowTimestamp - dateTime) <= 60) {//如果是一分钟内的消息，显示刚刚return @"刚刚";}return timeArr[3];}if ((zeroTime-dateTime)<24*3600) {//昨日return @"昨天";}if([timeNowDate timeIntervalSinceDate:anotherday] < 7 * OnedayTimeIntervalValue) {//一周内NSString *weekDay = [SDTimeFormatUtil weekdayStr:msgDateComponents.weekday];return weekDay;}return [NSString stringWithFormat:@"%@/%@",timeArr[1],timeArr[2]];} @catch (NSException *exception) {//出现异常return [NSString stringWithFormat:@"%ld",timeStamp];}
}+ (NSString*)weekdayStr:(NSInteger)dayOfWeek {static NSDictionary *daysOfWeekDict = nil;daysOfWeekDict = @{@(1):@"星期日",@(2):@"星期一",@(3):@"星期二",@(4):@"星期三",@(5):@"星期四",@(6):@"星期五",@(7):@"星期六",};return [daysOfWeekDict objectForKey:@(dayOfWeek)];
}/**今日时间范围内的具体划分@param date date@return 今日时间格式*/
+ (NSString *)timeStringOfToday:(NSDate *)date {NSDate *today = [NSDate date];NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];unsigned int unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;NSDateComponents *components = [gregorian components:unitFlags fromDate:date toDate:today options:0];/*if ([components hour]) {return [NSString stringWithFormat:@"%ld小时前",(long)[components hour]];}if ([components minute]) {return [NSString stringWithFormat:@"%ld分钟前",(long)[components minute]];}*/if ([components hour]) {//几个小时前return [NSString stringWithFormat:@"%02ld:%02ld",components.hour,components.minute];}if ([components minute]) {//多少分钟前return [NSString stringWithFormat:@"%02ld:%02ld",components.hour,components.minute];}if ([components second]) {return @"刚刚";}return @"刚刚";
}/**今日零点@return 整型*/
+ (int)zeroOfDate {NSCalendar *calendar = [NSCalendar currentCalendar];NSDateComponents *components = [calendar components:NSUIntegerMax fromDate:[NSDate date]];components.hour = 0;components.minute = 0;components.second = 0;NSTimeInterval ts = (int)[[calendar dateFromComponents:components] timeIntervalSince1970];return ts;
}/**返回格式为YYYY-dd-mm的时间字符串@return 时间字符串*/
+ (NSString *)formatterDayDate:(long)timeStamp {NSDate *date = [SDTimeFormatUtil getDateTimeFromTimeStamp:timeStamp];NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];[dateFormatter setDateFormat:@"YYYY-MM-dd"];NSString *dateStr = nil;if (self) {dateStr = [dateFormatter stringFromDate:date];}return dateStr;
}/**将时间戳转换为NSDate类型@param timeStamp timeStamp@return date*/
+ (NSDate *)getDateTimeFromTimeStamp:(long)timeStamp {return [NSDate dateWithTimeIntervalSince1970:timeStamp];
}@end