iOS--时间戳
谷梁英资
写在前面
目前的所有电子产品的时间都是按照全球统一的Unix时间来计时的，unix时间又是从1970年1月1日0时刻开始的。所以无论是苹果还是安卓 还是Windows 或者其他的linux系统都是同一套时间体系；
由于本人项目开发中经常会配件需要时间计算的工作，所以呢在工作之余就把项目中的代码拿出来单独写的一个关于Unix时间计算的工具类，以供大家使用。
主要属性：
@interface TimeCalculator : NSObject
@property (nonatomic,assign) NSTimeInterval unixTimeInterval;//GMT时间戳 微秒级
@property (nonatomic,strong) NSDate *unixDate;//GMT时间 2016-01-04 8:55:46 +0000
@property (nonatomic,strong) NSString *LocalTimeZone;//本地时区 GMT-12 GMT+12
@property (nonatomic,assign) NSInteger timeOffset;//时间偏移量
@property (nonatomic,assign) double unixTimestamp;//GMT+0 毫秒
@property (nonatomic,assign) NSInteger unixZeroTimestamp;//当天零点 GMT+0 秒
主要方法：
+ (TimeCalculator *)shareTimeCalculator;//单例 类方法
- (NSTimeInterval)getUnixTimestampAtNow;//Unix时间戳 若要获取某天的零时刻 必须先执行找个方法
- (NSString *)getSystemTimeZone;//本地时区
- (NSString *)getTimeStringWithTime:(double)time;//字符串输出时间 设置日期格式带毫秒的 2016-01-04 16:55:46
- (NSInteger)getUnixTimeWithDay:(NSInteger)day;// 某天的零时Unix时间戳
- (NSInteger)getUnixTimeWithDay:(NSInteger)day AndClock:(NSInteger)clock; // 某天的特定时刻Unix时间戳
- (NSInteger)gettimestampWithDateFormatString:(NSString *)dateFormatString;
- (NSString *)formatTimeWithTime:(NSNumber *)time;//根据传入时间数值 返回hh:mm:ss格式的时间 这个是表示时间点的
- (NSString *)formatHMWithTime:(NSNumber *)time;//根据传入时间数值 返回hh:mm格式的时间 这个时用来表示时间长短的
- (NSString *)getTravelTimeWithStartTime:(NSNumber *)startTime andEndTime:(NSNumber *)endTime;//根据传入时间数值返回时间差值分钟 这个时用来表示时间长短的
- (NSString *)getDayHourMinWithTimeStamp:(NSNumber *)time;
@end
TimeCalculator.m文件
包含方法的具体实现，用法都在.h文件里写了
+ (TimeCalculator *)shareTimeCalculator{
static TimeCalculator *unixTime = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
unixTime = [[TimeCalculator alloc]init];
});
return unixTime;
}
- (NSTimeInterval)getUnixTimestampAtNow{
self.unixDate = [NSDate date];
NSTimeInterval time=[self.unixDate timeIntervalSince1970];
self.unixTimeInterval =time;
NSString *timeIntervalString = [NSString stringWithFormat:@"%f",self.unixTimeInterval];
NSString *micSecondString = [timeIntervalString substringWithRange:NSMakeRange(timeIntervalString.length-6, 3)];
NSInteger micSec = [micSecondString integerValue];
self.unixTimestamp = (NSInteger)time+micSec/1000.000;
[self getUnixZeroTimestamp];
[self getSystemTimeZone];
[self getTimeOffset];
return self.unixTimeInterval;
}
- (NSString *)getSystemTimeZone{
NSTimeZone *timezone = [NSTimeZone systemTimeZone];
NSString *timeAbbreviation = timezone.abbreviation;
self.LocalTimeZone = timeAbbreviation;
if ([timeAbbreviation isEqualToString:@"GMT"]) {
self.LocalTimeZone = @"GMT+0";
}
return self.LocalTimeZone;
}
- (void)getTimeOffset{
NSString *str1 = [self.LocalTimeZone substringWithRange:NSMakeRange(3, 1)];
NSString *str2 = [self.LocalTimeZone substringWithRange:NSMakeRange(4, self.LocalTimeZone.length-4)];
NSInteger timeZoneOffset = [str2 integerValue];
if ([str1 isEqualToString:@"+"]) {
self.timeOffset = timeZoneOffset*3600;
}else if ([str1 isEqualToString:@"-"]){
self.timeOffset = -timeZoneOffset*3600;
}
}
- (NSInteger)getUnixZeroTimestamp{
self.unixZeroTimestamp = (NSInteger)(self.unixTimestamp/86400)*86400;
return self.unixZeroTimestamp;
}
- (NSString *)getTimeStringWithTime:(double)time{
NSDate *date = [NSDate dateWithTimeIntervalSince1970:time];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
// 设置日期格式带秒的 2016-01-04 16:55:46
NSString *timeString = [dateFormat stringFromDate:date];
return timeString;
}
- (NSInteger)gettimestampWithDateFormatString:(NSString *)dateFormatString{
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
NSDate *date = [dateFormat dateFromString:dateFormatString];
NSInteger time= [date timeIntervalSince1970];
return time;
}
- (NSInteger)getUnixTimeWithDay:(NSInteger)day{
NSInteger unixTime = self.unixZeroTimestamp-(day-1)*86400-self.timeOffset;
return unixTime;
}
- (NSInteger)getUnixTimeWithDay:(NSInteger)day AndClock:(NSInteger)clock{//特定时刻的Unix时间戳
if (clock<0||clock>24) {//为了避免传入数据不正确 进行换算 增强可靠性
clock = clock%24;
if (clock<0) {
clock=clock+24;
}else{
clock=clock;
}
}else{
clock=clock;
}
NSInteger unixTime = self.unixZeroTimestamp-(day-1)*86400+3600*clock;//-self.timeOffset;
return unixTime;
}
- (NSString *)formatTimeWithTime:(NSNumber *)time{
float _time_2 = [time floatValue];
NSInteger _time_1 = [time integerValue];
NSInteger sec = (NSInteger)((_time_2-_time_1)*60);
NSInteger hour;
NSInteger min;
if (_time_1>=1 && _time_1<60) {
min = _time_1%60;
return [NSString stringWithFormat:@"%ld:%.2ld",min,sec];
}
if (_time_1>=60) {
hour = _time_1/60;
min = _time_1%60;
return [NSString stringWithFormat:@"%ld:%.2ld:%.2ld",hour,min,sec];
}
return [NSString stringWithFormat:@"0:%.2ld",sec];
}
- (NSString *)formatHMWithTime:(NSNumber *)time{
TimeCalculator *timeCalculator = [TimeCalculator shareTimeCalculator];
NSString *string = [timeCalculator getTimeStringWithTime:[time integerValue]];
NSArray *firArray = [string componentsSeparatedByString:@" "];
NSString *firstring = firArray[1];
NSMutableArray *secArray = [NSMutableArray arrayWithArray:[firstring componentsSeparatedByString:@":"]];
[secArray removeLastObject];
return [secArray componentsJoinedByString:@":"];
}
- (NSString *)getTravelTimeWithStartTime:(NSNumber *)startTime andEndTime:(NSNumber *)endTime{
NSInteger _startTime = [startTime integerValue];
NSInteger _endTime = [endTime integerValue];
NSInteger travelTime = (_endTime - _startTime)/60+1;
return [NSString stringWithFormat:@"%ld",travelTime];
}
- (NSString *)getDayHourMinWithTimeStamp:(NSNumber *)time{
NSInteger _time = [time integerValue];
NSDate *date = [NSDate dateWithTimeIntervalSince1970:_time];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm"];
// 设置日期格式 2016-01-04 16:55:46
NSString *timeString = [dateFormat stringFromDate:date];
return timeString;
}
最后
这个时间工具类写的并不是很完美，具体的可能需要各位在去修改了
欢迎访问！
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