我正在使用Typo3 4.5.3并且我在一个目录中有图像文件，我想从中随机选择一个在当前页面上显示的目录，但我似乎无法正确使用typoscript制作listnum = rand工作。这是我的扩展模板：
# Pick a random image to display
temp.banner = IMAGE
temp.banner {
file {
height = 165
width = 954
import {
filelist = {$templatePathPrefix}images/banners | jpg,jpeg,png,gif | name | | 1
listNum = rand
}
}
params = class="bannerPic"
}
如果我将listnum设置更改为0,1等，则会在页面中插入相应的img HTML。将其设置为“last”也可以，但rand 始终会插入第一张图片，无论我刷新多少次。由于我可以选择特定图像（0,1，...），我知道一般设置有效，而不是随机选择。
我已经看到TS用于rand的各种其他用途，它将外部对象包装在COA_INT对象中，但这对我也不起作用。我错过了关于listNum = rand的放置位置吗？我在Typo3上很新，所以很多时候对我来说仍然很不透明（或者它显示了吗？）。感谢您提供的任何见解。
答案 0 :(得分：2)
mak_stdwrapextended扩展程序增加了使用rand和listNum的可能性。
适用于4.5。
答案 1 :(得分：1)
我不建议您通过TypoScript进行随机选择。由于每次加载页面时都需要一个随机图像，因此随机元素必须是USER_INT或COA_INT元素，因此不能缓存。
一个简单的解决方案是通过JavaScript来实现。如果客户端上没有JavaScript，则定义默认图像，以及随机选择图像的JavaScript。使用此解决方案，您每次都会获得一个随机图像，并且您的内容可以完全缓存。
以下TypoScript代码可以为您提供一些灵感。它基本上从边界列中读出Image-Elements并生成JavaScript以随机输出它们。此外，图像是可链接的。
lib.teaser = COA
lib.teaser.10 = CONTENT
lib.teaser.10 < styles.content.getBorder
lib.teaser.10 {
slide = -1
table=tt_content
select{
begin = 0
max = 1
#language
languageField=sys_language_uid
#from wich column
where=colPos=3
}
wrap=<div class="teaserimage">|</div>
renderObj=COA
#image with gallery function
renderObj.10 = COA
renderObj.10 {
stdWrap.required=1
# get image
10 = IMAGE
10 {
#if not empty
required=1
file.import=uploads/pics/
file.import.field=image
#file.width=266
#file.height=180
file.import.listNum = 0
stdWrap.insertData=1
params = id="imgbig_{TSFE:currentRecord}"
imageLinkWrap < tt_content.image.20.1.imageLinkWrap
imageLinkWrap.typolink.ATagParams = id="link_imgbig_{TSFE:currentRecord}"
imageLinkWrap.typolink.ATagParams.stdWrap.insertData=1
}
# standard image configuration from tt_content
10.altText < tt_content.image.20.1.altText
10.titleText < tt_content.image.20.1.titleText
10.longdescURL < tt_content.image.20.1.longdescURL
# random function for gallery images
30 = COA
30 {
stdWrap.required=1
stdWrap.dataWrap(
<script type="text/javascript">
/* <![CDATA[ */
var imgArray = new Array(|);
var randnum = Math.round(Math.random()*(imgArray.length-1));
document.getElementById('imgbig_{TSFE:currentRecord}').src ='uploads/pics/' + imgArray[randnum];
/* ]]> */
</script>
)
# first gallery image
10 = TEXT
10.field = image
10.listNum.splitChar=,
10.listNum=0
10.if.isTrue.field=image
10.if.isTrue.listNum=1
10.if.isTrue.listNum.splitChar=,
10.dataWrap = "|"
# other gallery images
20 = TEXT
20.field = image
20.split {
token = ,
cObjNum = 1
1 = COA
1.if.isPositive.data = TSFE:register|SPLIT_COUNT
1 {
10 = TEXT
10.data = current:1
10.dataWrap = ,"|"
}
}
}
# random function for gallery links
40 = COA
40 {
stdWrap.required=1
stdWrap.dataWrap(
<script type="text/javascript">
/* <![CDATA[ */
//var imgLinkArray = new Array(randnum);
var imgLinkArray = new Array(|);
if(document.getElementById('link_imgbig_{TSFE:currentRecord}')) document.getElementById('link_imgbig_{TSFE:currentRecord}').href = imgLinkArray[randnum];
/* ]]> */
</script>
)
# first gallery link
10 = TEXT
10.field = image_link
10.listNum.splitChar=,
10.listNum=0
10.dataWrap = "|"
10.typolink.parameter.field = image_link
10.typolink.returnLast = url
# other gallery links
20 = TEXT
20.field = image_link
20.split {
token = ,
cObjNum = 1
1 = COA
1.if.isPositive.data = TSFE:register|SPLIT_COUNT
1 {
10 = TEXT
10.data = current:1
10.dataWrap = ,"|"
10.typolink.parameter.data = current:1
10.typolink.returnLast = url
}
}
}
}
}
答案 2 :(得分：1)
只有typo3 V4.6及以上版本在核心中有listNum = rand，请参阅此http://forge.typo3.org/issues/16180
对于typo3 V4.5你必须扩展tslib / class.tslib_content.php
将此添加到localconf.php：
$TYPO3_CONF_VARS['FE']['XCLASS']['tslib/class.tslib_content.php'] = PATH_site.'fileadmin/template/class.ux_tslib_content.php';
并将此代码添加到class.ux_tslib_content.php：
<?php
/***************************************************************
* Copyright notice
*
* (c) 1999-2008 Kasper Skaarhoj (kasperYYYY@typo3.com)
* All rights reserved
*
* This script is part of the TYPO3 project. The TYPO3 project is
* free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* The GNU General Public License can be found at
* http://www.gnu.org/copyleft/gpl.html.
* A copy is found in the textfile GPL.txt and important notices to the license
* from the author is found in LICENSE.txt distributed with these scripts.
*
*
* This script is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/
/**
* Contains classes for Content Rendering based on TypoScript Template configuration
*
* $Id: class.tslib_content.php 4254 2008-09-27 13:35:44Z dmitry $
* Revised for TYPO3 3.6 June/2003 by Kasper Skaarhoj
* XHTML compliant
*
* class tslib_cObj : All main TypoScript features, rendering of content objects (cObjects). This class is the backbone of TypoScript Template rendering.
*
* @author Kasper Skaarhoj <kasperYYYY@typo3.com>
*/
/**
* This class contains all main TypoScript features.
* This includes the rendering of TypoScript content objects (cObjects).
* Is the backbone of TypoScript Template rendering.
*
* There are lots of functions you can use from your include-scripts.
* The class "tslib_cObj" is normally instantiated and referred to as "cObj".
* When you call your own PHP-code typically through a USER or USER_INT cObject then it is this class that instantiates the object and calls the main method. Before it does so it will set (if you are using classes) a reference to itself in the internal variable "cObj" of the object. Thus you can access all functions and data from this class by $this->cObj->... from within you classes written to be USER or USER_INT content objects.
*
* @author Kasper Skaarhoj <kasperYYYY@typo3.com>
* @package TYPO3
* @subpackage tslib
* @link http://typo3.org/doc.0.html?&tx_extrepmgm_pi1[extUid]=270&cHash=4ad9d7acb4
*/
class ux_tslib_cObj extends tslib_cObj{
/**
* Exploding a string by the $char value (if integer its an ASCII value) and returning index $listNum
*
* @param string String to explode
* @param string Index-number. You can place the word "last" in it and it will be substituted with the pointer to the last value. You can use math operators like "+-/*" (passed to calc())
* @param string Either a string used to explode the content string or an integer value which will then be changed into a character, eg. "10" for a linebreak char.
* @return string
*/
function listNum($content,$listNum,$char) {
$char = $char ? $char : ',';
if (t3lib_div::testInt($char)) {
$char = chr($char);
}
$temp = explode($char,$content);
$last = ''.(count($temp)-1);
if($listNum === 'rand'){ $listNum = rand(0,count($temp)-1);} //taywa added: rand feature!
$index=$this->calc(str_ireplace('last',$last,$listNum));
return $temp[$index];
}
}
?>