iOS-时间戳转String

-(NSString *)backMsgTime:(NSInteger)time

{

    NSString *timeString = [NSStringstringWithFormat:@"%ld",(long)time];

    // 格式化时间

    NSDateFormatter* formatter = [[NSDateFormatteralloc] init];

    formatter.timeZone = [NSTimeZonetimeZoneWithName:@"shanghai"];

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

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

    

    NSDate* date = [NSDatedateWithTimeIntervalSince1970:[timeStringdoubleValue]/ 1000.0];

    NSString* dateString = [formatterstringFromDate:date];

    return dateString;

}