我正在为一个家庭 friend 开发一个网站。在上面,他们希望将所有同事的标志放在一行上,巧妙地褪色以替换第一次不适合的其他标志。
为了实现这一点,我分配了 <img>
的类,这些类表示它们应该出现在哪个循环中,这取决于给定当前宽度的行中将容纳多少图像。这发生在我的 assignCycleNumbers
函数中。
然后为了实际淡入淡出,我有另一个名为 cycleAssociates
的函数,它递归地淡入和淡出适当的类。理论上很好,但是它似乎不能正常工作,这特别奇怪,因为 i tested the function here 并且它工作正常。它们之间的唯一区别是现在我正在尝试动态分配周期数。
我真的很难过,可以帮忙!
您可以看到 website hosted here,如果您向下滚动到内容底部,您会在底部看到徽标,但行为不符合预期。 (第一个循环看起来不错,但随后的循环变得困惑,如果您将屏幕调整为较小的屏幕宽度,则更容易观察到)。
您可以通过浏览器彻底检查代码,但这里有您需要知道的一切,再次感谢您的任何见解。
编辑 : The whole javascript file as requested. 但所有相关内容如下:
JS:
//single global variable to represent how many logo cycles there is
var totalCycles = 0;
...
$(window).load(function() {
...
totalCycles = assignCycleNumbers();
cycleAssociates();
});
// window is resized
$(function(){
$(window).resize(function() {
...
totalCycles = assignCycleNumbers();
});
});
...
function cycleAssociates(){
var cycle = 0;
var recursiveCycling = function(cycle, totalCycles){
var currentAssociate = ".cycle" + cycle;
//fade in all img with the current cyle class over a second,
//wait 3 seconds before fading out over a second.
$(currentAssociate).delay(100).fadeIn(1000).delay(3000).fadeOut(1000,
function(){
cycle++;
if(cycle > totalCycles){
cycle = 0;
}
recursiveCycling(cycle, totalCycles);
});
};
recursiveCycling(cycle, totalCycles);
}
function assignCycleNumbers(){
//first remove any old cycle# classes (resized window case)
$('[class*="cycle"]').removeClass( function(unusedIdx,c){
return c.match(/cycle\d+/g).join(" ");
});
//measure div width
var divSpace = $("#bodies").innerWidth();
//assign a cycle number to a number of logos until no more will fit in that div
var cycleNum = 0;
$(".associate").each(function(){
if( divSpace - $(this).width() > 0){
$(this).addClass("cycle" + cycleNum);
divSpace = divSpace - $(this).width();
}
else{ //next logo won't fit current cycle, create next cycle
cycleNum++
$(this).addClass("cycle" + cycleNum);
divSpace = $("#bodies").innerWidth() - $(this).width();
}
});
return cycleNum;
}
html:
<img class="associate" src="IMG/spare.png" alt=""/>
<img class="associate" src="IMG/bcs_professional.jpg" alt="BCS Professional Member"/>
<img class="associate" src="IMG/climate_savers.jpg" alt="Climate Savers Smart Computing"/>
<img class="associate" src="IMG/code_of_conduct.jpg" alt="Data Centres Code Of Conduct Endorser"/>
<img class="associate" src="IMG/spare.gif" alt=""/>
<img class="associate" src="IMG/enistic.gif" alt="Enistic"/>
<img class="associate" src="IMG/greentrac_authorised.png" alt="Greentrac Authorised Reseller"/>
<img class="associate" src="IMG/very_pc.jpg" alt="Very PC Approved"/>
<img class="associate" src="IMG/spare.jpg" alt=""/>
css:
#bodies img.associate{
float: left;
max-width: 120px;
max-height: 80px;
display:none;
}
最佳答案
问题是您的 fadeOut
函数的回调甚至在当前循环中的所有元素都淡出之前就被执行了。这是您的函数的修改版本,可以按预期工作:
function cycleAssociates(){
var cycle = 0;
var recursiveCycling = function(cycle, totalCycles){
var currentAssociate = ".cycle" + cycle;
var n = $(currentAssociate).length; //How many images in current cycle?
$(currentAssociate).each(function() {
$(this).delay(100).fadeIn(1000).delay(3000).fadeOut(1000, function() {
n --;
if(n <= 0) { //current cycle done?
cycle++;
if(cycle > totalCycles){
cycle = 0;
}
recursiveCycling(cycle, totalCycles);
}
});
});
};
recursiveCycling(cycle, totalCycles);
}
要解决调整窗口大小时出现的问题,请尝试将当前的
$(window).resize
处理程序替换为:$(function(){
$(window).resize(function() {
parallelNavbar();
$(".associate").stop(); //if there are any animations, stop 'em
$(".associate").hide(); //hide all associates
totalCycles = assignCycleNumbers(); //update the assignment
cycleAssociates(); //let's get cyclin' again!
});
});
虽然我认为你在滚动方面有一些问题。不过,这应该可以解决主要的循环问题——所以我希望能有所帮助!