iOS 时间字符串&NSDate&时间戳 相互转

• 前段时间一直在和时间打交道,这几天整理了一下几个时间相互转换的方法,再次做记录
• 效果图

屏幕快照 2017-05-17 下午3.32.24.png 屏幕快照 2017-05-17 下午3.32.43.png

• 时间戳转字符串

+(NSString *)timeStampConversionNSString:(NSString *)timeStamp
{
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:[timeStamp longLongValue]/1000];
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *dateStr = [formatter stringFromDate:date];
    return dateStr;
}

• 时间转时间戳

+(NSString *)dateConversionTimeStamp:(NSDate *)date
{
    NSString *timeSp = [NSString stringWithFormat:@"%ld", (long)[date timeIntervalSince1970]*1000];
    return timeSp;
}

• 字符串转时间

+(NSDate *)nsstringConversionNSDate:(NSString *)dateStr
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
    NSDate *datestr = [dateFormatter dateFromString:dateStr];
    return datestr;
}