NSDate基础用法

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NSDate *date = [NSDate date];

NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(24*60*60)];

NSDateFormatter *format = [[NSDateFormatter alloc] init];

//设置日期的类型

[format setDateStyle:NSDateFormatterLongStyle];

//设置时间的类型

[format setTimeStyle:NSDateFormatterShortStyle];

//设置日期格式

[format setDateFormat:@”yyyy-MM-dd hh:mm:ss:SSS”];

NSString *s = [format stringFromDate:date];

NSLog(@”%@”,s);
1.2 拆分时间

//得到当前时间

NSDate *date = [NSDate date];

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

//实例化一个日期的对象,这个对象不是NSDate的是NSDateComponents的

NSDateComponents *com = [[NSDateComponents alloc] init];

//做一个标示，表示我们要什么内容

//从一个日期里面把这些内容取出来

com = [calendar components:flags fromDate:date];

NSInteger year = [com year];

NSInteger month = [com month];

NSInteger day = [com day];

NSInteger hour = [com hour];

NSInteger min = [com minute];

NSInteger sec = [com second];

NSLog(@”%ld”,(long)year);

NSLog(@”%ld”,(long)month);

NSLog(@”%ld”,(long)day);

NSLog(@”%ld”,(long)hour);

NSLog(@”%ld”,(long)min);

NSLog(@”%ld”,(long)sec);
1.3.1 抢购剩余时间

(NSString*)getExpireTime:(NSString*)date
{
// 2016-07-26 13:12:20.0
// 剩余：19:20:09
// NSString->NSDate
NSDateFormatter* formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @”yyyy-MM-dd HH:mm:ss.S”;
//字符串转成date
NSDate* expireDate = [formatter dateFromString:date];
int second = [expireDate timeIntervalSinceNow];
int h = second / 3600;
int m = second % 3600 /60;
int s = second % 60;
return [NSString stringWithFormat:@”剩余：%02d:%02d:%02d”,h,m,s];

}

使用NSString *s = [JDDate getExpireTime:@"2016-07-26     13:12:20.0"];NSLog(@"%@",s);剩余：41:56:06

1.3.2 抢购剩余时间

(NSString*)getExpireTime:(NSString*)date
{
NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@”yyyy-MM-dd HH:mm:ss.S”];
//结束时间
NSDate* toDate = [dateFormatter dateFromString:@”2016-07-27 13:12:20.0”];
//开始时间
NSDate* startDate = [NSDate date];
//实例化一个日历 NSGregorianCalendar这个格式的日历
NSCalendar* chineseClendar = [[ NSCalendar alloc ]
initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSUInteger unitFlags = NSHourCalendarUnit |
NSMinuteCalendarUnit |
NSSecondCalendarUnit |
NSDayCalendarUnit |
NSMonthCalendarUnit |
NSYearCalendarUnit;
NSDateComponents *cps = [chineseClendar components:unitFlags fromDate:startDate toDate:toDate options:0]
NSInteger diffYear = [cps year];
NSInteger diffMon = [cps month];
NSInteger diffDay = [cps day];
NSInteger diffHour = [cps hour];
NSInteger diffMin = [cps minute];
NSInteger diffSec = [cps second];
return [NSString stringWithFormat:@”剩余: Years: %ld
Months: %ld,
Days: %ld,
Hours: %ld,
Mins:%ld,
sec:%ld”,
(long)diffYear, (long)diffMon, (long)diffDay,
(long)diffHour, (long)diffMin,(long)diffSec];

}

使用

NSString *s = [JJDate getExpireTime:@”2016-07-27 13:12:20.0”];

NSLog(@”%@”,s);

结果：剩余: Years: 0 Months: 0, Days; 1, Hours: 18, Mins:31, sec:37
1.4 评论发布时间

(NSString )getReleaseTime:(NSString )releaseTime
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
//dateFormat时间样式属性,传入格式必须按这个
formatter.dateFormat = @”yyyy-MM-dd HH:mm:ss.S”;
//locale：”区域；场所”
formatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@”en_US”];
//发布时间
NSDate *date = [formatter dateFromString:releaseTime];
//现在时间
NSDate *now = [NSDate date];
//发布时间到现在间隔多长时间，用timeIntervalSinceDate
NSTimeInterval interval = [now timeIntervalSinceDate:date];
NSString *format;
if (interval <= 60) {
```
format = @"刚刚";
```
} else if(interval <= 60*60){
```
format = [NSString stringWithFormat:@"发布于前%.f分钟",interval/60];
```
} else if(interval <= 60*60*24){
```
format = [NSString stringWithFormat:@"发布于前%.f小时",interval/3600];
```
} else if (interval <= 60*60*24*7){
```
format = [NSString stringWithFormat:@"发布于前%d天",          (int)interval/(60*60*24)];
```
} else if (interval > 60*60*24*7 & interval <= 60*60*24*30 ){
```
format = [NSString stringWithFormat:@"发布于前%d周",          (int)interval/(60*60*24*7)];
```
}else if(interval > 60*60*24*30 ){
```
format = [NSString stringWithFormat:@"发布于前%d月",          (int)interval/(60*60*24*30)];
```
}
return format;

}

使用

NSString *s = [JJDate getReleaseTime:@”2016-05-31 13:12:20.0”];

NSLog(@”%@”,s);

结果：发布于前1天
1.5 农历

(NSString ) getChineseCalendarWithDate:(NSDate ) date
{
/天干名称/
const char *cTianGan[] = {“甲”,”乙”,”丙”,”丁”,”戊”,”己”,”庚”,”辛”,”壬”,”癸”};
/地支名称/
const char *cDiZhi[] = {“子”,”丑”,”寅”,”卯”,”辰”,”巳”,”午”,
“未”,”申”,”酉”,”戌”,”亥”};
/属相名称/
const char *cShuXiang[] = {“鼠”,”牛”,”虎”,”兔”,”龙”,”蛇”,
“马”,”羊”,”猴”,”鸡”,”狗”,”猪”};
/农历日期名/
const char cDayName[] = {““,”初一”,”初二”,”初三”,”初四”,”初五”,
“初六”,”初七”,”初八”,”初九”,”初十”,
“十一”,”十二”,”十三”,”十四”,”十五”,
“十六”,”十七”,”十八”,”十九”,”二十”,
“廿一”,”廿二”,”廿三”,”廿四”,”廿五”,
“廿六”,”廿七”,”廿八”,”廿九”,”三十”};
/农历月份名/
const char cMonName[] = {““,”正”,”二”,”三”,”四”,”五”,”六”,
“七”,”八”,”九”,”十”,”十一”,”腊”};
/公历每月前面的天数/
const int wMonthAdd[12] = {0,31,59,90,120,151,181,212,243,273,304,334};
/农历数据/
const int wNongliData[100] =
{2635,333387,1701,1748,267701,694,2391,133423,1175,396438
,3402,3749,331177,1453,694,201326,2350,465197,3221,3402
,400202,2901,1386,267611,605,2349,137515,2709,464533,1738
,2901,330421,1242,2651,199255,1323,529706,3733,1706,398762
,2741,1206,267438,2647,1318,204070,3477,461653,1386,2413
,330077,1197,2637,268877,3365,531109,2900,2922,398042,2395
,1179,267415,2635,661067,1701,1748,398772,2742,2391,330031
,1175,1611,200010,3749,527717,1452,2742,332397,2350,3222
,268949,3402,3493,133973,1386,464219,605,2349,334123,2709
,2890,267946,2773,592565,1210,2651,395863,1323,2707,265877};
static int wCurYear,wCurMonth,wCurDay;
static int nTheDate,nIsEnd,m,k,n,i,nBit;
// char szNongli[30], szNongliDay[10],szShuXiang[10];
NSString * szNongli = @”“;
NSString * szNongliMonth = @”“;
NSString * szShuXiang = @”“;
/—取当前公历年、月、日—/
NSCalendar * cal = [NSCalendar currentCalendar];
NSUInteger unitFlags = NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;
NSDateComponents * conponent = [cal components:unitFlags fromDate:date];
wCurYear = [conponent year];
wCurMonth = [conponent month];
wCurDay = [conponent day];
/—计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)—/
nTheDate = (wCurYear - 1921) * 365 + (wCurYear - 1921) / 4 + wCurDay + wMonthAdd
[wCurMonth - 1] - 38;
if((!(wCurYear % 4)) && (wCurMonth > 2))
nTheDate = nTheDate + 1;
/–计算农历天干、地支、月、日—/
nIsEnd = 0;
m = 0;
while(nIsEnd != 1)
{
if(wNongliData[m] < 4095)
k = 11;
else
k = 12;
n = k;
while(n>=0)
{
//获取wNongliData(m)的第n个二进制位的值
nBit = wNongliData[m];
for(i=1;i

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