OC ----关于时间的处理

 

//获得当前时间距1970的秒数

- (NSString *)setCurrTimeLenght

{

    NSTimeInterval time = [[NSDate date] timeIntervalSince1970];

    NSString *timeLenght = [NSString stringWithFormat:@"%0.0f",time];

    return timeLenght;

}

 

//根据距离1970年的秒数算给定秒数的日期时间

- (NSString *)getTimeString

{

    NSString *strTime = [[NSString alloc]initWithString:self];

    

    NSDate *mydate1970 = [NSDate dateWithTimeIntervalSince1970: strTime.length >

([self setCurrTimeLenght].length+2)

 ? ([strTime longLongValue]/1000) : [strTime longLongValue]];

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

    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];  //时间格式

    

    dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"zh_CN"];

    strTime = [dateFormatter stringFromDate:mydate1970];

    

    return strTime;

}

 

//获取只有时分秒

- (NSString *)getHoursMinutesString

{

    NSString *strTime = [[NSString alloc]initWithString:self];

    NSDate *mydate1970 = [NSDate dateWithTimeIntervalSince1970: strTime.length > ([self setCurrTimeLenght].length+2) ? ([strTime longLongValue]/1000) : [strTime longLongValue]];

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];//@"yyyy-MM-dd HH:mm:ss"

    [dateFormatter setDateFormat:@"HH:mm:ss"];

    

    dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"zh_CN"];

    strTime = [dateFormatter stringFromDate:mydate1970];

    

    

    return strTime;

}

 

 

//获取时分

- (NSString *)getHoursMinString

{

    NSString *strTime = [[NSString alloc]initWithString:self];

    NSDate *mydate1970 = [NSDate dateWithTimeIntervalSince1970: strTime.length > ([self setCurrTimeLenght].length+2) ? ([strTime longLongValue]/1000) : [strTime longLongValue]];

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

    [dateFormatter setDateFormat:@"HH:mm"];

    

    dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"zh_CN"];

    strTime = [dateFormatter stringFromDate:mydate1970];

    

    return strTime;

 

}