在开始详细介绍之前，请先查看出现此问题的实例 - http://jsfiddle.net/66HFU/（本文底部的脚本代码）
现在，如果你点击最后一行的任何图像，它会显示这些。但是，如果您单击上排图像，则会显示下面的行图像。
进一步调查显示，由于某种原因，调用函数选择器元素的字母仅与事件侦听器绑定，而第一个调用的函数选择器元素则不会。
所以，我想知道是否有任何方法可以使函数调用独立，因此后一个函数调用不会覆盖第一个函数（如果这样可以解决问题，当然）？
事件函数在元素上绑定的位置可以在函数 f_AddEvents 的第一行找到。
用于初始化Light Box的主函数调用位于代码的底部，如下所示：
LightBox.init({
selector: "[data-simplbox='demo1']",
boxId: "simplbox"
});
LightBox.init({
selector: "[data-simplbox='demo2']",
boxId: "simplbox",
imageLoadStart: activityIndicatorOn,
imageLoadEnd: activityIndicatorOff
});
所有代码：
;(function (window, document, undefined) {
var docElem = document.documentElement;
var DomM = (function() {
var f_ToDOMStyle = function (p_Style) {
return p_Style.replace(/\-[a-z]/g, function (p_Style) {
return p_Style.charAt(1).toUpperCase();
});
};
return {
event: {
set: function (p_Element, p_Events, p_Function) {
var i = 0,
j = 0;
p_Events = p_Events.split(" ");
if (!p_Element.length) {
for (i = 0; i < p_Events.length; i++) {
p_Element.addEventListener(p_Events[i], p_Function, false);
}
} else {
for (i = 0; i < p_Element.length; i++) {
for (j = 0; j < p_Events.length; j++) {
p_Element[i].addEventListener(p_Events[j], p_Function, false);
}
}
}
}
},
css: {
set: function (p_Element, p_Style) {
var j;
if (!p_Element.length) {
for (j in p_Style) {
if (p_Style.hasOwnProperty(j)) {
j = f_ToDOMStyle(j);
p_Element.style[j] = p_Style[j];
}
}
} else {
for (var i = 0; i < p_Element.length; i++) {
for (j in p_Style) {
if (p_Style.hasOwnProperty(j)) {
j = f_ToDOMStyle(j);
p_Element[i].style[j] = p_Style[j];
}
}
}
}
}
}
};
}());
var _LightBox = {
f_MergeObjects: function (p_Original, p_Updates) {
for (var i in p_Updates) {
if (p_Updates.hasOwnProperty(i)) {
p_Original[i] = p_Updates[i];
}
}
return p_Original;
},
f_isFunction: function (p_Function) {
return !!(p_Function && p_Function.constructor && p_Function.call && p_Function.apply);
},
f_Initialize: function (p_Options) {
var base = this;
base.m_Options = base.f_MergeObjects(_LightBox.options, p_Options || {});
base.m_Elements = document.querySelectorAll(base.m_Options.selector);
base.m_ElementsLength = base.m_Elements.length - 1;
base.m_Body = document.getElementsByTagName("body")[0];
base.m_CurrentImageElement = false;
base.m_CurrentImageNumber = 0;
base.m_Direction = 1;
base.m_InProgress = false;
base.m_InstalledImageBox = false;
console.log(base.m_Elements);
// Check if hardware acceleration is supported and check if touch is enabled.
base.f_CheckBrowser();
// Adds events.
base.f_AddEvents();
},
f_CheckBrowser: function () {
var base = this,
isTouch = "ontouchstart" in window || window.navigator.msMaxTouchPoints || navigator.maxTouchPoints || false,
vendors = ["ms", "O", "Moz", "Webkit", "Khtml"],
rootStyle = docElem.style,
hardwareAccelerated = false;
if ("transform" in rootStyle) {
hardwareAccelerated = true;
} else {
while (vendors.length) {
if (vendors.pop() + "Transform" in rootStyle) {
hardwareAccelerated = true;
}
}
}
base.browser = {
"isHardwareAccelerated": hardwareAccelerated,
"isTouch": isTouch
};
},
f_AddEvents: function () {
var base = this;
// Add open image event on images.
for (var i = 0; i < base.m_Elements.length; i++) {
(function (i) {
base.m_Elements[i].addEventListener("click", function (event) {
event.preventDefault();
console.log(base.m_Elements[i]);
if (base.f_isFunction(base.m_Options.onImageStart)) {
base.m_Options.onImageStart();
}
base.f_OpenImage(i);
}, false);
})(i);
}
// Resize event for window.
window.addEventListener("resize", function (event) {
event.preventDefault();
base.f_SetImage();
}, false);
// Add keyboard support.
if (base.m_Options.enableKeyboard) {
var keyBoard = {
left: 37,
right: 39,
esc: 27
};
window.addEventListener("keydown", function (event) {
event.preventDefault();
if (base.m_CurrentImageElement) {
if (base.m_InProgress) {
return false;
}
switch (event.keyCode) {
case keyBoard.left:
// If the previous one is out of target range then go to the last image.
if ((base.m_CurrentImageNumber - 1) < 0) {
base.f_OpenImage(base.m_ElementsLength, "left");
} else {
base.f_OpenImage(base.m_CurrentImageNumber - 1, "left");
}
return false;
case keyBoard.right:
// If the next one is out of target range then go to the first image.
if ((base.m_CurrentImageNumber + 1) > base.m_ElementsLength) {
base.f_OpenImage(0, "right");
} else {
base.f_OpenImage(base.m_CurrentImageNumber + 1, "right");
}
return false;
case keyBoard.esc:
base.f_QuitImage();
return false;
}
}
return false;
}, false);
}
// Add document click event.
if (base.m_Options.quitOnDocumentClick) {
document.body.addEventListener("click", function (event) {
var target = event.target ? event.target : event.srcElement;
event.preventDefault();
if (target && target.id != "imagelightbox" && base.m_CurrentImageElement && !base.m_InProgress && base.m_InstalledImageBox) {
base.f_QuitImage();
return false;
}
return false;
}, false);
}
},
f_OpenImage: function (p_WhichOne, p_Direction) {
var base = this,
newFragment = document.createDocumentFragment(),
newImageElement = document.createElement("img"),
target = base.m_Elements[p_WhichOne].getAttribute("href");
if (base.m_CurrentImageElement) {
base.f_RemoveImage();
}
if (base.f_isFunction(base.m_Options.imageLoadStart)) {
base.m_Options.imageLoadStart();
}
base.m_InProgress = true;
base.m_InstalledImageBox = false;
base.m_Direction = typeof p_Direction === "undefined" ? 1 : p_Direction == "left" ? -1 : 1;
newImageElement.setAttribute("src", target);
newImageElement.setAttribute("alt", "LightBox");
newImageElement.setAttribute("id", base.m_Options.boxId);
newFragment.appendChild(newImageElement);
base.m_Body.appendChild(newFragment);
base.m_CurrentImageElement = document.getElementById(base.m_Options.boxId);
base.m_CurrentImageElement.style.opacity = "0";
base.m_CurrentImageNumber = p_WhichOne;
if (base.m_Options.quitOnImageClick) {
base.f_ImageClickEvent = function (event) {
event.preventDefault();
base.f_QuitImage();
};
base.m_CurrentImageElement.addEventListener("click", base.f_ImageClickEvent, false);
}
if (base.browser.isHardwareAccelerated) {
DomM.css.set(base.m_CurrentImageElement, base.f_AddTransitionSpeed(base.m_Options.animationSpeed));
}
base.f_SetImage();
DomM.css.set(base.m_CurrentImageElement, base.f_doTranslateX(50 * base.m_Direction + "px"));
setTimeout(function () {
if (base.browser.isHardwareAccelerated) {
setTimeout(function () {
DomM.css.set(base.m_CurrentImageElement, base.f_doTranslateX("0px"));
}, 50);
}
if (base.f_isFunction(base.m_Options.imageLoadEnd)) {
base.m_Options.imageLoadEnd();
}
}, 20);
setTimeout(function () {
base.m_InProgress = false;
base.m_InstalledImageBox = true;
}, base.m_Options.animationSpeed - 200);
},
f_SetImage: function () {
var base = this,
screenHeight = window.innerHeight || docElem.offsetHeight,
screenWidth = window.innerWidth || docElem.offsetWidth,
tmpImage = new Image(),
imageWidth, imageHeight, imageSizeRatio;
if (!base.m_CurrentImageElement) {
return;
}
tmpImage.onload = function () {
imageWidth = this.width;
imageHeight = this.height;
imageSizeRatio = imageWidth / imageHeight;
if (Math.floor(screenWidth/imageSizeRatio) > screenHeight) {
imageWidth = screenHeight * imageSizeRatio * 0.7;
imageHeight = screenHeight * 0.7;
} else {
imageWidth = screenWidth * 0.7;
imageHeight = screenWidth / imageSizeRatio * 0.7;
}
DomM.css.set(base.m_CurrentImageElement, {
"top": ((screenHeight - imageHeight) / 2) + "px",
"left": ((screenWidth - imageWidth) / 2) + "px",
"width": Math.floor(imageWidth) + "px",
"height": Math.floor(imageHeight) + "px",
"opacity": 1
});
};
tmpImage.src = base.m_CurrentImageElement.getAttribute("src");
},
f_RemoveImage: function () {
var base = this;
if (base.m_CurrentImageElement) {
if (base.f_isFunction(base.m_Options.quitOnImageClick)) {
base.m_CurrentImageElement.removeEventListener("click", base.f_ImageClickEvent, false);
}
base.m_CurrentImageElement.parentNode.removeChild(base.m_CurrentImageElement);
base.m_CurrentImageElement = false;
}
return false;
},
f_QuitImage: function () {
var base = this;
if (base.m_CurrentImageElement) {
setTimeout(function () {
DomM.css.set(base.m_CurrentImageElement, {
"opacity": 0,
"transition": ("opacity " + base.m_Options.fadeOutSpeed + "ms ease")
});
setTimeout(function () {
base.f_RemoveImage();
if (base.f_isFunction(base.m_Options.onImageQuit)) {
base.m_Options.onImageQuit();
}
}, base.m_Options.fadeOutSpeed);
}, 20);
}
},
f_IsValidSource: function (p_Src) {
return new RegExp().test(p_Src);
},
f_doTranslateX: function (p_Pixels) {
return {
"-webkit-transform": "translateX(" + p_Pixels + ")",
"-moz-transform": "translateX(" + p_Pixels + ")",
"-o-transform": "translateX(" + p_Pixels + ")",
"-ms-transform": "translateX(" + p_Pixels + ")",
"transform": "translateX(" + p_Pixels + ")"
};
},
f_AddTransitionSpeed: function (p_Speed) {
var base = this;
return {
"-webkit-transition": "transform " + p_Speed + "ms ease, opacity " + base.m_Options.fadeInSpeed + "ms ease",
"-moz-transition": "transform " + p_Speed + "ms ease, opacity " + base.m_Options.fadeInSpeed + "ms ease",
"-o-transition": "transform " + p_Speed + "ms ease, opacity " + base.m_Options.fadeInSpeed + "ms ease",
"transition": "transform " + p_Speed + "ms ease, opacity " + base.m_Options.fadeInSpeed + "ms ease"
};
}
};
_LightBox.options = {
selector: "[data-imagelightbox]",
boxId: "imagelightbox",
allowedTypes: "png|jpg|jpeg|gif",
quitOnImageClick: true,
quitOnDocumentClick: true,
enableKeyboard: true,
animationSpeed: 750,
fadeInSpeed: 500,
fadeOutSpeed: 200,
imageLoadStart: function () {},
imageLoadEnd: function () {},
onImageQuit: function () {},
onImageStart: function () {}
};
LightBox.init = function (p_Options) {
_LightBox.f_Initialize(p_Options);
};
})(window, document, window.LightBox = window.LightBox || {});
var activityIndicatorOn = function () {
var newE = document.createElement("div"),
newB = document.createElement("div");
newE.setAttribute("id", "imagelightbox-loading");
newE.appendChild(newB);
document.body.appendChild(newE);
},
activityIndicatorOff = function () {
var elE = document.getElementById("imagelightbox-loading");
elE.parentNode.removeChild(elE);
};
LightBox.init({
selector: "[data-simplbox='demo1']",
boxId: "simplbox"
});
LightBox.init({
selector: "[data-simplbox='demo2']",
boxId: "simplbox",
imageLoadStart: activityIndicatorOn,
imageLoadEnd: activityIndicatorOff
});
答案 0 :(得分：0)
您的代码几乎正常运行。你处理得很糟糕的事实是你可以执行几个init。在每个init上，您将覆盖一些项目，尤其是使用以下行：
base.m_Elements = document.querySelectorAll(base.m_Options.selector);
所以base.m_Elements只会包含最后一个init的元素 （基于名称'init'，我想知道真正的用例是不允许只调用一次init ...）
快速修复是使用以下命令执行单个init：
LightBox.init({
selector: "[data-simplbox='demo1'],[data-simplbox='demo2']",
boxId: "simplbox"
});
（删除对init的两次调用） 这里有效。
http://jsfiddle.net/gamealchemist/66HFU/1/
所以我想你要么支持几个init，要么（实际上更容易维护），在多个init上抛出异常，并期望lib用户在单个init调用中编写正确的选择器。
编辑：为您的问题提供超快速解决方案：不要将LightBox作为单身人士，而是将其作为一个类：
function LightBox( initArguments ) {
// something like what was done in init
}
LightBox.prototype = {
f_RemoveImage : function() {
} ,
f_OpenImage : function( ..., ... ) {
} ,
...
}
然后你可以毫无问题地致电：
var demo1LB = new LightBox({ selector: "[data-simplbox='demo1']",
boxId: "simplbox" });
var demo2LB = new LightBox({ selector: "[data-simplbox='demo2']",
boxId: "simplbox" });