///时间戳转化为字符转0000-00-00 00:00
+ (NSString *)time_timestampToString:(NSInteger)timestamp{
 NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];
 NSDateFormatter *dateFormat=[[NSDateFormatter alloc]init];
  [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm"];
 NSString* string=[dateFormat stringFromDate:confromTimesp];
 return string;
}

///date转化为字符转0000-00-00 00:00
+ (NSString *)time_dateToString:(NSDate *)date{
 NSDateFormatter *dateFormat=[[NSDateFormatter alloc]init];
 [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm"];
 NSString* string=[dateFormat stringFromDate:date];
 return string;
}