//现在时间time    要比较的时间time1  NSTimeInterval = [[NSDate date] timeIntervalSince1970];    NSTimeInterval time1 = [selectedDate timeIntervalSince1970];    if (time1

//时间格式化-(NSString *)getDateAccordingTime:(NSString *)aTime formatStyle:(NSString *)formate{        NSDate *nowDate = [NSDate dateWithTimeIntervalSince1970:[aTime intValue]];    NSDateFormatter* formatter = [[NSDateFormatter alloc] init];       [formatter setDateFormat:formate];    return[formatter stringFromDate:nowDate];}  _timeLabel.text = [self getDateAccordingTime:_model.time formatStyle:@"YYYY-MM-dd HH:mm:ss"];

#pragma mark-正则表达式验证手机号-(BOOL)isValiadateMobile:(NSString *)mobile{        NSString *phoneRegex=@"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";    NSPredicate *phoneTest=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];    return [phoneTest evaluateWithObject:mobile];}    if (![self isValiadateMobile:_telephoneTextField.text]) {                UIAlertView*alert = [[UIAlertView alloc]initWithTitle:@"请输入有效的联系人电话" message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];        [alert show];        return;    }