本文实例为大家展示了图片旋转、鼠标滚轮缩放、镜像、切换图片多重效果，提供了详细的代码，分享给大家供大家参考，具体内容如下
具体代码：
<!DOCTYPE html> <html lang="zh-cn"> <head> <title>图片旋转,鼠标滚轮缩放,镜像,切换图片</title> <meta charset="utf-8" /> <> <script type="text/javascript" src="js/abc.js"></script> </head> <body> <h1>效果预览</h1> <script> //容器对象 var ImageTrans = function(container, options) { this._initialize(container, options); this._initMode(); if (this._support) { this._initContainer(); this._init(); } else { //模式不支持 this.onError("not support"); } }; ImageTrans.prototype = { //初始化程序 _initialize: function(container, options) { var container = this._container = $$(container); this._clientWidth = container.clientWidth; //变换区域宽度 this._clientHeight = container.clientHeight; //变换区域高度 this._img = new Image(); //图片对象 this._style = {}; //备份样式 this._x = this._y = 1; //水平/垂直变换参数 this._radian = 0; //旋转变换参数 this._support = false; //是否支持变换 this._init = this._load = this._show = this._dispose = $$.emptyFunction; var opt = this._setOptions(options); this._zoom = opt.zoom; this.onPreLoad = opt.onPreLoad; this.onLoad = opt.onLoad; this.onError = opt.onError; this._LOAD = $$F.bind(function() { this.onLoad(); this._load(); this.reset(); this._img.style.visibility = "visible"; }, this); $$CE.fireEvent(this, "init"); }, //设置默认属性 _setOptions: function(options) { this.options = { //默认值 mode: "css3|filter|canvas", zoom: .1, //缩放比率 onPreLoad: function() {}, //图片加载前执行 onLoad: function() {}, //图片加载后执行 onError: function(err) {} //出错时执行 }; return $$.extend(this.options, options || {}); }, //模式设置 _initMode: function() { var modes = ImageTrans.modes; this._support = $$A.some(this.options.mode.toLowerCase().split("|"), function(mode) { mode = modes[mode]; if (mode && mode.support) { mode.init && (this._init = mode.init); //初始化执行程序 mode.load && (this._load = mode.load); //加载图片执行程序 mode.show && (this._show = mode.show); //变换显示程序 mode.dispose && (this._dispose = mode.dispose); //销毁程序 //扩展变换方法 $$A.forEach(ImageTrans.transforms, function(transform, name) { this[name] = function() { transform.apply(this, [].slice.call(arguments)); this._show(); } }, this); return true; } }, this); }, //初始化容器对象 _initContainer: function() { var container = this._container, style = container.style, position = $$D.getStyle(container, "position"); this._style = { "position": style.position, "overflow": style.overflow }; //备份样式 if (position != "relative" && position != "absolute") { style.position = "relative"; } style.overflow = "hidden"; $$CE.fireEvent(this, "initContainer"); }, //加载图片 load: function(src) { if (this._support) { var img = this._img, oThis = this; img.onload || (img.onload = this._LOAD); img.onerror || (img.onerror = function() { oThis.onError("err image"); }); img.style.visibility = "hidden"; this.onPreLoad(); img.src = src; } }, //重置 reset: function() { if (this._support) { this._x = this._y = 1; this._radian = 0; this._show(); } }, //销毁程序 dispose: function() { if (this._support) { this._dispose(); $$CE.fireEvent(this, "dispose"); $$D.setStyle(this._container, this._style); //恢复样式 this._container = this._img = this._img.onload = this._img.onerror = this._LOAD = null; } } }; //变换模式 ImageTrans.modes = function() { var css3Transform; //ccs3变换样式 //初始化图片对象函数 function initImg(img, container) { $$D.setStyle(img, { position: "absolute", border: 0, padding: 0, margin: 0, width: "auto", height: "auto", //重置样式 visibility: "hidden" //加载前隐藏 }); container.appendChild(img); } //获取变换参数函数 function getMatrix(radian, x, y) { var Cos = Math.cos(radian), Sin = Math.sin(radian); return { M11: Cos * x, M12: -Sin * y, M21: Sin * x, M22: Cos * y }; } return { css3: { //css3设置 support: function() { var style = document.createElement("div").style; return $$A.some( ["transform", "MozTransform", "webkitTransform", "OTransform"], function(css) { if (css in style) { css3Transform = css; return true; } }); }(), init: function() { initImg(this._img, this._container); }, load: function() { var img = this._img; $$D.setStyle(img, { //居中 top: (this._clientHeight - img.height) / 2 + "px", left: (this._clientWidth - img.width) / 2 + "px", visibility: "visible" }); }, show: function() { var matrix = getMatrix(this._radian, this._y, this._x); //设置变形样式 this._img.style[css3Transform] = "matrix(" + matrix.M11.toFixed(16) + "," + matrix.M21.toFixed(16) + "," + matrix.M12.toFixed(16) + "," + matrix.M22.toFixed(16) + ", 0, 0)"; }, dispose: function() { this._container.removeChild(this._img); } }, filter: { //滤镜设置 support: function() { return "filters" in document.createElement("div"); }(), init: function() { initImg(this._img, this._container); //设置滤镜 this._img.style.filter = "progid:DXImageTransform.Microsoft.Matrix(SizingMethod='auto expand')"; }, load: function() { this._img.onload = null; //防止ie重复加载gif的bug this._img.style.visibility = "visible"; }, show: function() { var img = this._img; //设置滤镜 $$.extend( img.filters.item("DXImageTransform.Microsoft.Matrix"), getMatrix(this._radian, this._y, this._x) ); //保持居中 img.style.top = (this._clientHeight - img.offsetHeight) / 2 + "px"; img.style.left = (this._clientWidth - img.offsetWidth) / 2 + "px"; }, dispose: function() { this._container.removeChild(this._img); } }, canvas: { //canvas设置 support: function() { return "getContext" in document.createElement('canvas'); }(), init: function() { var canvas = this._canvas = document.createElement('canvas'), context = this._context = canvas.getContext('2d'); //样式设置 $$D.setStyle(canvas, { position: "absolute", left: 0, top: 0 }); canvas.width = this._clientWidth; canvas.height = this._clientHeight; this._container.appendChild(canvas); }, show: function() { var img = this._img, context = this._context, clientWidth = this._clientWidth, clientHeight = this._clientHeight; //canvas变换 context.save(); context.clearRect(0, 0, clientWidth, clientHeight); //清空内容 context.translate(clientWidth / 2, clientHeight / 2); //中心坐标 context.rotate(this._radian); //旋转 context.scale(this._y, this._x); //缩放 context.drawImage(img, -img.width / 2, -img.height / 2); //居中画图 context.restore(); }, dispose: function() { this._container.removeChild(this._canvas); this._canvas = this._context = null; } } }; }(); //变换方法 ImageTrans.transforms = { //垂直翻转 vertical: function() { this._radian = Math.PI - this._radian; this._y *= -1; }, //水平翻转 horizontal: function() { this._radian = Math.PI - this._radian; this._x *= -1; }, //根据弧度旋转 rotate: function(radian) { this._radian = radian; }, //向左转90度 left: function() { this._radian -= Math.PI / 2; }, //向右转90度 right: function() { this._radian += Math.PI / 2; }, //根据角度旋转 rotatebydegress: function(degress) { this._radian = degress * Math.PI / 180; }, //缩放 scale: function() { function getZoom(scale, zoom) { return scale > 0 && scale > -zoom ? zoom : scale < 0 && scale < zoom ? -zoom : 0; } return function(zoom) { if (zoom) { var hZoom = getZoom(this._y, zoom), vZoom = getZoom(this._x, zoom); if (hZoom && vZoom) { this._y += hZoom; this._x += vZoom; } } } }(), //放大 zoomin: function() { this.scale(Math.abs(this._zoom)); }, //缩小 zoomout: function() { this.scale(-Math.abs(this._zoom)); } }; //拖动旋转 ImageTrans.prototype._initialize = (function() { var init = ImageTrans.prototype._initialize, methods = { "init": function() { this._mrX = this._mrY = this._mrRadian = 0; this._mrSTART = $$F.bind(start, this); this._mrMOVE = $$F.bind(move, this); this._mrSTOP = $$F.bind(stop, this); }, "initContainer": function() { $$E.addEvent(this._container, "mousedown", this._mrSTART); }, "dispose": function() { $$E.removeEvent(this._container, "mousedown", this._mrSTART); this._mrSTOP(); this._mrSTART = this._mrMOVE = this._mrSTOP = null; } }; //开始函数 function start(e) { var rect = $$D.clientRect(this._container); this._mrX = rect.left + this._clientWidth / 2; this._mrY = rect.top + this._clientHeight / 2; this._mrRadian = Math.atan2(e.clientY - this._mrY, e.clientX - this._mrX) - this._radian; $$E.addEvent(document, "mousemove", this._mrMOVE); $$E.addEvent(document, "mouseup", this._mrSTOP); if ($$B.ie) { var container = this._container; $$E.addEvent(container, "losecapture", this._mrSTOP); container.setCapture(); } else { $$E.addEvent(window, "blur", this._mrSTOP); e.preventDefault(); } }; //拖动函数 function move(e) { this.rotate(Math.atan2(e.clientY - this._mrY, e.clientX - this._mrX) - this._mrRadian); window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); }; //停止函数 function stop() { $$E.removeEvent(document, "mousemove", this._mrMOVE); $$E.removeEvent(document, "mouseup", this._mrSTOP); if ($$B.ie) { var container = this._container; $$E.removeEvent(container, "losecapture", this._mrSTOP); container.releaseCapture(); } else { $$E.removeEvent(window, "blur", this._mrSTOP); }; }; return function() { var options = arguments[1]; if (!options || options.mouseRotate !== false) { //扩展钩子 $$A.forEach(methods, function(method, name) { $$CE.addEvent(this, name, method); }, this); } init.apply(this, arguments); } })(); //滚轮缩放 ImageTrans.prototype._initialize = (function() { var init = ImageTrans.prototype._initialize, mousewheel = $$B.firefox "DOMMouseScroll" : "mousewheel", methods = { "init": function() { this._mzZoom = $$F.bind(zoom, this); }, "initContainer": function() { $$E.addEvent(this._container, mousewheel, this._mzZoom); }, "dispose": function() { $$E.removeEvent(this._container, mousewheel, this._mzZoom); this._mzZoom = null; } }; //缩放函数 function zoom(e) { this.scale(( e.wheelDelta ? e.wheelDelta / (-120) : (e.detail || 0) / 3 ) * Math.abs(this._zoom)); e.preventDefault(); }; return function() { var options = arguments[1]; if (!options || options.mouseZoom !== false) { //扩展钩子 $$A.forEach(methods, function(method, name) { $$CE.addEvent(this, name, method); }, this); } init.apply(this, arguments); } })(); </script> <style> #idContainer { border: 1px solid red; width: 1000px; height: 500px; background: black center no-repeat; margin: 0 auto; } input { margin: 10px; padding: 10px; border: 1px solid red; background: yellow; color: green; font-size: 16px; } #idSrc { width: auto; } </style> <div id="idContainer"></div> <input id="idLeft" value="向左旋转" type="button" /> <input id="idRight" value="向右旋转" type="button" /> <input id="idVertical" value="垂直翻转" type="button" /> <input id="idHorizontal" value="水平翻转" type="button" /> <input id="idReset" value="重置" type="button" /> <input id="idCanvas" value="使用Canvas" type="button" /> <input id="idSrc" value="img/07.jpg" type="text" /> <input id="idLoad" value="换图" type="button" /> <script> (function() { var container = $$("idContainer"), src = "img/7.jpg", options = { onPreLoad: function() { container.style.backgroundImage = "url('http://images.cnblogs.com/cnblogs_com/cloudgamer/169629/o_loading.gif')"; }, onLoad: function() { container.style.backgroundImage = ""; }, onError: function(err) { container.style.backgroundImage = ""; alert(err); } }, it = new ImageTrans(container, options); it.load(src); //垂直翻转 $$("idVertical").onclick = function() { it.vertical(); } //水平翻转 $$("idHorizontal").onclick = function() { it.horizontal(); } //左旋转 $$("idLeft").onclick = function() { it.left(); } //右旋转 $$("idRight").onclick = function() { it.right(); } //重置 $$("idReset").onclick = function() { it.reset(); } //换图 $$("idLoad").onclick = function() { it.load($$("idSrc").value); } //Canvas $$("idCanvas").onclick = function() { if (this.value == "默认模式") { this.value = "使用Canvas"; delete options.mode; } else { this.value = "默认模式"; options.mode = "canvas"; } it.dispose(); it = new ImageTrans(container, options); it.load(src); } })() </script> </body> </html>
abc.js
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以上就是js代码实现图片旋转、鼠标滚轮缩放、镜像、切换图片等效果的代码，希望对大家学习javascript程序设计有所帮助。
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