时间戳转时间

-(NSString *)stringtooDate:(NSString *)timeString{

//    [self stringtooDate:[datestr substringToIndex:10]];

    NSTimeInterval time=[timeString doubleValue];//由于时差问题要加8小时 == 28800 sec

    NSDate *detaildate=[NSDate dateWithTimeIntervalSince1970:time];

    //实例化一个NSDateFormatter对象

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

    //设定时间格式,这里能够设置成本身须要的格式

    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

    NSString *currentDateStr = [dateFormatter stringFromDate: detaildate];

    return currentDateStr;

}