ios时间相关的工具NSDate

短命女 2022-06-10 12:11 204阅读 0赞

/获取年月日对象
    +(NSDateComponents *)getDateComponents:(NSDate *)date {
        NSCalendar *calendar = [NSCalendar currentCalendar];
    //    [calendar setFirstWeekday:2]; //设置每周的开始是星期一
    //    [calendar setMinimumDaysInFirstWeek:7]; //设置一周至少需要几天
        return [calendar components:
                NSYearCalendarUnit|
                NSMonthCalendarUnit|
                NSDayCalendarUnit|
                NSWeekOfYearCalendarUnit|
                NSQuarterCalendarUnit fromDate:date];
    }
    
    //获得某年的周数
    +(NSInteger)getWeek_AccordingToYear:(NSInteger)year {
        
        NSDateComponents *comps = [DataTimeTool getDateComponents:[DataTimeTool dateFromString:[NSString stringWithFormat:@"%ld-12-31",year] DateFormat:@"yyyy-MM-dd"]];
        NSInteger week = [comps weekOfYear];
        if (week == 1) {
            return 52;
        }else {
            return week;
        }
    }
    
    /**
     *  获取某年某周的范围日期
     *
     *  @param year       年份
     *  @param weekofYear year里某个周
     *
     *  @return 时间范围字符串
     */
    +(NSString*)getWeekRangeDate_Year:(NSInteger)year WeakOfYear:(NSInteger)weekofYear
    {
        NSString *weekDate = @"";
        NSString *timeAxis = [NSString stringWithFormat:@"%ld-06-01 12:00:00",(long)year];
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
        NSDate *date = [dateFormatter dateFromString:timeAxis];
        
        NSCalendar *calendar = [NSCalendar currentCalendar];
        /**这两个参数的设置影响着周次的个数和划分*****************/
        [calendar setFirstWeekday:2]; //设置每周的开始是星期一
    //    [calendar setMinimumDaysInFirstWeek:7]; //设置一周至少需要几天
        NSDateComponents *comps = [calendar components:(NSCalendarUnitWeekOfYear | NSCalendarUnitWeekday | NSCalendarUnitWeekdayOrdinal | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay)
                                              fromDate:date];
        //时间轴是当前年的第几周
        NSInteger todayIsWeek = [comps weekOfYear];
        if ([DataTimeTool getWeek_AccordingToYear:year] == 53) {
            todayIsWeek += 1;
        }
        //获取时间轴是星期几 1(星期天) 2(星期一) 3(星期二) 4(星期三) 5(星期四) 6(星期五) 7(星期六)
        NSInteger todayIsWeekDay = [comps weekday];
        // 计算当前日期和这周的星期一和星期天差的天数
        //firstDiff 星期一相差天数 、 lastDiff 星期天相差天数
        long firstDiff,lastDiff;
        if (todayIsWeekDay == 1) {
            firstDiff = -6;
            lastDiff = 0;
        }else
        {
            firstDiff = [calendar firstWeekday] - todayIsWeekDay;
            lastDiff = 8 - todayIsWeekDay;
        }
        
        NSDate *firstDayOfWeek= [NSDate dateWithTimeInterval:24*60*60*firstDiff sinceDate:date];
        NSDate *lastDayOfWeek= [NSDate dateWithTimeInterval:24*60*60*lastDiff sinceDate:date];
        
        long weekdifference = weekofYear - todayIsWeek;
        
        firstDayOfWeek= [NSDate dateWithTimeInterval:24*60*60*7*weekdifference sinceDate:firstDayOfWeek];
        lastDayOfWeek= [NSDate dateWithTimeInterval:24*60*60*7*weekdifference sinceDate:lastDayOfWeek];
        
        weekDate = [NSString stringWithFormat:@"第%ld周(%@-%@)",weekofYear,[DataTimeTool stringFromDate:firstDayOfWeek DateFormat:@"yyyy年M月d号"],[DataTimeTool stringFromDate:lastDayOfWeek DateFormat:@"yyyy年M月d号"]];
        
        return weekDate;
    }
    
    /**************************当前时间********************************/
    +(NSDateComponents *)getCurrentDateComponents {
        return [DataTimeTool getDateComponents:[NSDate date]];
    }
    +(NSInteger)getCurrentWeek {
        NSInteger week = [[DataTimeTool stringFromDate:[NSDate date] DateFormat:@"w"] intValue];
        return week;
    }
    +(NSInteger)getCurrentYear{
        NSInteger year = [[DataTimeTool stringFromDate:[NSDate date] DateFormat:@"y"] intValue];
        return year;
    }
    
    +(NSInteger)getCurrentQuarter{
        NSInteger quarter = [[DataTimeTool stringFromDate:[NSDate date] DateFormat:@"q"] intValue];
        return quarter;
    }
    
    +(NSInteger)getCurrentMonth{
        NSInteger month = [[DataTimeTool stringFromDate:[NSDate date] DateFormat:@"M"] intValue];
        return month;
    }
    
    +(NSInteger)getCurrentDay{
        NSInteger day = [[DataTimeTool stringFromDate:[NSDate date] DateFormat:@"d"] intValue];
        return day;
    }
    
    //NSString转NSDate
    +(NSDate *)dateFromString:(NSString *)dateString DateFormat:(NSString *)DateFormat{
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:DateFormat];
        NSDate *destDate= [dateFormatter dateFromString:dateString];
        return destDate;
    }
    
    //NSDate转NSString
    +(NSString *)stringFromDate:(NSDate *)date DateFormat:(NSString *)DateFormat{
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:DateFormat];
        NSString *destDateString = [dateFormatter stringFromDate:date];
        return destDateString;
    }
    
    //时间追加
    +(NSString *)dateByAddingTimeInterval:(NSTimeInterval)TimeInterval DataTime:(NSString *)dateStr DateFormat:(NSString *)DateFormat{
        NSString *str = nil;
        NSDate *date = [self dateFromString:dateStr DateFormat:DateFormat];
        NSDate * newDate = [date dateByAddingTimeInterval:TimeInterval];
        str = [self stringFromDate:newDate DateFormat:DateFormat];
        return str;
    }
    
    //日期字符串格式化
    +(NSString *)getDataTime:(NSString *)dateStr DateFormat:(NSString *)DateFormat {
       return [self getDataTime:dateStr DateFormat:DateFormat oldDateFormat:nil];
    }
    
    
    +(NSString *)getDataTime:(NSString *)dateStr DateFormat:(NSString *)DateFormat oldDateFormat:(NSString *)oldDateFormat{
        
        if (!dateStr || [dateStr isEqualToString:@"—"]) {
            return @"—";
        }
        
        if ([dateStr isEqualToString:@"0"]) {
            return @"0";
        }
        
        if ([dateStr rangeOfString:@"+"].location != NSNotFound) {
            NSArray *strarray = [dateStr componentsSeparatedByString:@"+"];
            dateStr = strarray[0];
        }
        
        if ([dateStr rangeOfString:@"."].location != NSNotFound) {
            NSArray *strarray = [dateStr componentsSeparatedByString:@"."];
            dateStr = strarray[0];
        }
        
        if ([dateStr rangeOfString:@"T"].location != NSNotFound) {
            dateStr = [dateStr stringByReplacingOccurrencesOfString:@"T" withString:@" "];
        }
        
        NSDateFormatter *newDateFormatter = [[NSDateFormatter alloc]init];
        [newDateFormatter setDateFormat:DateFormat];
        
        NSDateFormatter *oldDateFormatter = [[NSDateFormatter alloc] init];
        
        if (oldDateFormat) {
            [oldDateFormatter setDateFormat:oldDateFormat];
        }else {
            [oldDateFormatter setDateFormat:[self getFormat:dateStr]];
        }
        
        NSDate *date = [oldDateFormatter dateFromString:dateStr];
        
        return [newDateFormatter stringFromDate:date];
    }
    
    +(int)getNumberOfCharactersInString:(NSString *)str c:(char)c {
        int count = 0;
        if ([str rangeOfString:[NSString stringWithFormat:@"%c",c]].location != NSNotFound){
            for (int i=0;i<str.length;i++){
                if ([str characterAtIndex:i] == c){
                    count++;
                }
            }
        }
        return count;
    }
    
    +(NSString *)getFormat:(NSString *)dateString {
        NSString *str = [NSString new];
        int size = [self getNumberOfCharactersInString:dateString c:'-'];
        if (size == 0){
            str = [str stringByAppendingString:@"yyyy"];
        }else if (size == 1){
            str = [str stringByAppendingString:@"yyyy-MM"];
        }else if (size == 2){
            str = [str stringByAppendingString:@"yyyy-MM-dd"];
        }
        size = [self getNumberOfCharactersInString:dateString c:':'];
        if (size == 0 && [dateString rangeOfString:@" "].location != NSNotFound){
            str = [str stringByAppendingString:@" HH"];
        }else if (size == 1){
            str = [str stringByAppendingString:@" HH:mm"];
        }else if (size == 2){
            str = [str stringByAppendingString:@" HH:mm:ss"];
        }
        return str;
    }
    
    /**
     *  json日期转iOS时间
     *
     *  @param string /Date()
     *
     *  @return
     */
    +(NSString *)interceptTimeStampFromStr:(NSString *)string DateFormat:(NSString *)DateFormat{
        if (!string || [string length] == 0 ) // 传入时间戳为空 返回
        {
            return @"—";
        }
        NSMutableString * mutableStr = [NSMutableString stringWithString:string];
        NSString * timeStampString = [NSString string];
        //  遍历取出括号内的时间戳
        for (int i = 0; i < string.length; i ++) {
            NSRange startRang = [mutableStr rangeOfString:@"("];
            NSRange endRang = [mutableStr rangeOfString:@")"];
            if (startRang.location != NSNotFound) {
                // 左边括号位置
                NSInteger leftLocation = startRang.location;
                // 右边括号距离左边括号的长度
                NSInteger rightLocation = endRang.location - startRang.location;
                // 截取括号时间戳内容
                timeStampString = [mutableStr substringWithRange:NSMakeRange(leftLocation + 1,rightLocation - 1)];
            }
        }
        
        // 把时间戳转化成时间
        NSTimeInterval interval=[timeStampString doubleValue] / 1000.0;
        NSDate *date = [NSDate dateWithTimeIntervalSince1970:interval];
        NSDateFormatter *objDateformat = [[NSDateFormatter alloc] init];
        [objDateformat setDateFormat:DateFormat];//年月日时分秒
        NSString * timeStr = [NSString stringWithFormat:@"%@",[objDateformat stringFromDate: date]];
        return timeStr;
    }

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