touch.js 拖动、缩放、旋转 （鼠标手势）功能代码

可以实现手势操作：拖动、缩放、旋转。封装好的脚本方法是这样的：varcat=window.cat||{};cat.t

可以实现手势操作：拖动、缩放、旋转。封装好的脚本方法是这样的：

var cat = window.cat || {}; 
cat.touchjs = { 
 left: 0, 
 top: 0, 
 scaleVal: 1, //缩放 
 rotateVal: 0, //旋转 
 curStatus: 0, //记录当前手势的状态, 0:拖动, 1:缩放, 2:旋转 
 //初始化 
 init: function ($targetObj, callback) { 
 touch.on($targetObj, 'touchstart', function (ev) { 
 cat.touchjs.curStatus = 0; 
 ev.preventDefault();//阻止默认事件 
 }); 
 if (!window.localStorage.cat_touchjs_data) 
 callback(0, 0, 1, 0); 
 else { 
 var jsonObj = JSON.parse(window.localStorage.cat_touchjs_data); 
 cat.touchjs.left = parseFloat(jsonObj.left), cat.touchjs.top = parseFloat(jsonObj.top), cat.touchjs.scaleVal = parseFloat(jsonObj.scale), cat.touchjs.rotateVal = parseFloat(jsonObj.rotate); 
 callback(cat.touchjs.left, cat.touchjs.top, cat.touchjs.scaleVal, cat.touchjs.rotateVal); 
 } 
 }, 
 //拖动 
 drag: function ($targetObj, callback) { 
 touch.on($targetObj, 'drag', function (ev) { 
 $targetObj.css("left", cat.touchjs.left + ev.x).css("top", cat.touchjs.top + ev.y); 
 }); 
 touch.on($targetObj, 'dragend', function (ev) { 
 cat.touchjs.left = cat.touchjs.left + ev.x; 
 cat.touchjs.top = cat.touchjs.top + ev.y; 
 callback(cat.touchjs.left, cat.touchjs.top); 
 }); 
 }, 
 //缩放 
 scale: function ($targetObj, callback) { 
 var initialScale = cat.touchjs.scaleVal || 1; 
 var currentScale; 
 touch.on($targetObj, 'pinch', function (ev) { 
 if (cat.touchjs.curStatus == 2) { 
 return; 
 } 
 cat.touchjs.curStatus = 1; 
 currentScale = ev.scale - 1; 
 currentScale = initialScale + currentScale; 
 cat.touchjs.scaleVal = currentScale; 
 var transformStyle = 'scale(' + cat.touchjs.scaleVal + ') rotate(' + cat.touchjs.rotateVal + 'deg)'; 
 $targetObj.css("transform", transformStyle).css("-webkit-transform", transformStyle); 
 callback(cat.touchjs.scaleVal); 
 }); 
 touch.on($targetObj, 'pinchend', function (ev) { 
 if (cat.touchjs.curStatus == 2) { 
 return; 
 } 
 initialScale = currentScale; 
 cat.touchjs.scaleVal = currentScale; 
 callback(cat.touchjs.scaleVal); 
 }); 
 }, 
 //旋转 
 rotate: function ($targetObj, callback) { 
 var angle = cat.touchjs.rotateVal || 0; 
 touch.on($targetObj, 'rotate', function (ev) { 
 if (cat.touchjs.curStatus == 1) { 
 return; 
 } 
 cat.touchjs.curStatus = 2; 
 var totalAngle = angle + ev.rotation; 
 if (ev.fingerStatus === 'end') { 
 angle = angle + ev.rotation; 
 } 
 cat.touchjs.rotateVal = totalAngle; 
 var transformStyle = 'scale(' + cat.touchjs.scaleVal + ') rotate(' + cat.touchjs.rotateVal + 'deg)'; 
 $targetObj.css("transform", transformStyle).css("-webkit-transform", transformStyle); 
 $targetObj.attr('data-rotate', cat.touchjs.rotateVal); 
 callback(cat.touchjs.rotateVal); 
 }); 
 } 
}; 

html代码：

<div style="position:relative;width: 100%;height: 250px;overflow: hidden;border: 1px dashed #ff0000;"> 
 <img id="targetObj" style="position:relative;transform-origin:center" src="http://demo.somethingwhat.com/images/flower1.jpg" /> 
</div>

 js调用：

var $targetObj = $('#targetObj'); 
//初始化设置 
cat.touchjs.init($targetObj, function (left, top, scale, rotate) {}; 
//初始化拖动手势（不需要就注释掉） 
cat.touchjs.drag($targetObj, function (left, top) { }); 
//初始化缩放手势（不需要就注释掉） 
cat.touchjs.scale($targetObj, function (scale) { }); 
//初始化旋转手势（不需要就注释掉） 
cat.touchjs.rotate($targetObj, function (rotate) { }); 

以上所述是小编给大家介绍的touch.js 拖动、缩放、旋转 （鼠标手势）功能代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！

touch.js 手势拖动 旋转 touch.js 手势缩放 旋转