#pragma mark 时间戳转时间
- (NSString *)dateStr:(NSString *)timeStampStr{
NSString *timeStampString = timeStampStr;
NSTimeInterval interval = [timeStampString doubleValue] / 1000.0;
NSDate *date = [NSDate dateWithTimeIntervalSince1970:interval];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm"];
NSString *dateString = [formatter stringFromDate: date];
return dateString;
}