jquery - 不在jQuery中循环

好吧，我只是想不通。在查看并重新查看了我的代码大概几个小时之后，我仍然没有发现这种奇怪的行为。
这与背景的淡入有关，而且它会使阵列中列出的大约12幅图像消失。
被忽略的图像有：bg6、bg36、bg13、bg8、bg14、bg15、bg24、bg29、bg27、bg9、bg19、bg3
主要规范第1部分：

insertLayer();

var bg1 = "#000 url('./images/background/image_1.jpg') no-repeat fixed center center";
var bg2 = "#000 url('./images/background/image_2.jpg') no-repeat fixed center center";
var bg3 = "#000 url('./images/background/image_3.jpg') no-repeat fixed center center";

var bg4 = "#000 url('./images/background/image_4.jpg') no-repeat fixed center center";
var bg5 = "#000 url('./images/background/image_5.jpg') no-repeat fixed center center";
var bg6 = "#000 url('./images/background/image_6.jpg') no-repeat fixed center center";

var bg7 = "#000 url('./images/background/image_7.jpg') no-repeat fixed center center";
var bg8 = "#000 url('./images/background/image_8.jpg') no-repeat fixed center center";
var bg9 = "#000 url('./images/background/image_9.jpg') no-repeat fixed center center";

var bg10 = "#000 url('./images/background/image_10.jpg') no-repeat fixed center center";
var bg11 = "#000 url('./images/background/image_11.jpg') no-repeat fixed center center";
var bg12 = "#000 url('./images/background/image_12.jpg') no-repeat fixed center center";

var bg13 = "#000 url('./images/background/image_13.jpg') no-repeat fixed center center";
var bg14 = "#000 url('./images/background/image_14.jpg') no-repeat fixed center center";
var bg15 = "#000 url('./images/background/image_15.jpg') no-repeat fixed center center";

var bg16 = "#000 url('./images/background/image_16.jpg') no-repeat fixed center center";
var bg17 = "#000 url('./images/background/image_17.jpg') no-repeat fixed center center";
var bg18 = "#000 url('./images/background/image_18.jpg') no-repeat fixed center center";

var bg19 = "#000 url('./images/background/image_19.jpg') no-repeat fixed center center";
var bg20 = "#000 url('./images/background/image_20.jpg') no-repeat fixed center center";
var bg21 = "#000 url('./images/background/image_21.jpg') no-repeat fixed center center";

var bg22 = "#000 url('./images/background/image_22.jpg') no-repeat fixed center center";
var bg23 = "#000 url('./images/background/image_23.jpg') no-repeat fixed center center";
var bg24 = "#000 url('./images/background/image_24.jpg') no-repeat fixed center center";

var bg25 = "#000 url('./images/background/image_25.jpg') no-repeat fixed center center";
var bg26 = "#000 url('./images/background/image_26.jpg') no-repeat fixed center center";
var bg27 = "#000 url('./images/background/image_27.jpg') no-repeat fixed center center";

var bg28 = "#000 url('./images/background/image_28.jpg') no-repeat fixed center center";
var bg29 = "#000 url('./images/background/image_29.jpg') no-repeat fixed center center";
var bg30 = "#000 url('./images/background/image_30.jpg') no-repeat fixed center center";

var bg31 = "#000 url('./images/background/image_31.jpg') no-repeat fixed center center";
var bg32 = "#000 url('./images/background/image_32.jpg') no-repeat fixed center center";
var bg33 = "#000 url('./images/background/image_33.jpg') no-repeat fixed center center";

var bg34 = "#000 url('./images/background/image_34.jpg') no-repeat fixed center center";
var bg35 = "#000 url('./images/background/image_35.jpg') no-repeat fixed center center";
var bg36 = "#000 url('./images/background/image_36.jpg') no-repeat fixed center center";

var bg37 = "#000 url('./images/background/image_37.jpg') no-repeat fixed center center";
var bg38 = "#000 url('./images/background/image_38.jpg') no-repeat fixed center center";
var bg39 = "#000 url('./images/background/image_39.jpg') no-repeat fixed center center";

var bg40 = "#000 url('./images/background/image_40.jpg') no-repeat fixed center center";
var bg41 = "#000 url('./images/background/image_41.jpg') no-repeat fixed center center";

 var images = [bg30, bg34, bg6, bg7, bg10, bg36, bg33, bg26, bg14, bg5, bg40, bg13, bg16, bg23, bg8, bg18, bg32, bg14, bg31, bg15, bg24, bg20, bg22, bg29, bg37, bg41, bg27, bg25, bg12, bg9, bg4, bg21, bg19, bg1, bg28, bg3, bg2, bg39, bg38];

var current = 0;

for (var a = 0; a < 39; a++)
{
 $('#fade1').fadeOut(16000, function()
 {
  $('#fade1').css("background", images[current]);
  current++;
 });

 if (current > 38)
 {
  current = 0;
 }

 $('#fade1').fadeIn(16000, function()
 {
  $('#background').css("background", images[current]);
  current++;
 });

 if (current > 38)
 {
  current = 0;
 }

 $('#fade1').fadeOut(16000, function()
 {
  $('#fade1').css("background", images[current]);
  current++;
 });

 if (current > 38)
 {
  current = 0;
 }
}

主要规范第2部分：

var backgroundFader = function(element, bgClasses, nextChange)

{
 this.cssProps = {'position' : 'relative', 'z-index' : 100};
 this.bgs   = ['bg1', 'bg2', 'bg3', 'bg4', 'bg5', 'bg6', 'bg7', 'bg8', 'bg9', 'bg10', 'bg11', 'bg12', 'bg13', 'bg14', 'bg15', 'bg16', 'bg17', 'bg18', 'bg19', 'bg20', 'bg21', 'bg22', 'bg23', 'bg24', 'bg25', 'bg26', 'bg27', 'bg28', 'bg29', 'bg30', 'bg31', 'bg32', 'bg33', 'bg34', 'bg35', 'bg36', 'bg37', 'bg38', 'bg39', 'bg40', 'bg41'];

 this.element  = element || ".bg_fader";
};

function insertLayer(element)
{
 var cssProps = {'position' : 'relative', 'z-index' : 100};
 var bgs   = ['bg1', 'bg2', 'bg3', 'bg4', 'bg5', 'bg6', 'bg7', 'bg8', 'bg9', 'bg10', 'bg11', 'bg12', 'bg13', 'bg14', 'bg15', 'bg16', 'bg17', 'bg18', 'bg19', 'bg20', 'bg21', 'bg22', 'bg23', 'bg24', 'bg25', 'bg26', 'bg27', 'bg28', 'bg29', 'bg30', 'bg31', 'bg32', 'bg33', 'bg34', 'bg35', 'bg36', 'bg37', 'bg38', 'bg39', 'bg40', 'bg41'];

 var element  = element || ".bg_fader";

 var layerel = element.substr(1) + "-layer";
 if(jQuery("#"+layerel).length == 0)
 {
  jQuery("<div id='"+layerel+"'></div>")
  .insertAfter(element)
  .nextAll().appendTo("#"+layerel)
  .parent().css(cssProps);
 }
}

谢谢你的帮助！

最佳答案

在这件事上必须站在mkoryak一边。代码使问题复杂化了很多。
我就是这样做的（当然，这是完全未经测试的）：

var fade_time = 1000;
var wait_time = 15000;
var curr = 0;
var last = 41;
var bg = $("#background");

function do_fade() {
    curr++;
    if (curr > last) {
        curr = 1;
    }
    bg.fadeOut( fade_time, function() {
        // switch your image here. something like this
        bg.css('background-image','./images/background/image_' + curr + '.jpg');
        bg.fadeIn( fade_time );
    }
}

id = setInterval( do_fade, wait_time );

希望这对你有用。

关于jquery - 不在jQuery中循环，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/1371133/