本文實例為大家分享了hammer.js實現圖片手勢放大效果的具體代碼，供大家參考，具體內容如下

 //圖片手勢放大      var reqAnimationFrame = (function() {        return window[Hammer.prefixed(window, 'requestAnimationFrame')] || function(callback) {          window.setTimeout(callback, 1000 / 60);        };      })();      var el = $('img');      var ticking = false;      var transform;      var initScale = 1;      var _eImg = '';      for (var m = 0; m < el.length; m++) {        var mc = new Hammer.Manager(el[m]);        mc.add(new Hammer.Pan({          threshold: 0,          pointers: 0        }));        mc.add(new Hammer.Swipe()).recognizeWith(mc.get('pan'));        mc.add(new Hammer.Pinch({          threshold: 0        })).recognizeWith(mc.get('pan'));        mc.on('panstart panmove', onPan);        mc.on('pinchstart pinchmove', onPinch);        mc.on('swipe', onSwipe);      }      function resetElement() {        el.addClass('animate');        transform = {          translate: {            x: 0,            y: 0          },          scale: 1,          angle: 0,          rx: 0,          ry: 0,          rz: 0        };        requestElementUpdate();      }      function updateElementTransform() {        var value = ['translate3d(' + transform.translate.x + 'px, ' + transform.translate.y + 'px, 0)', 'scale(' + transform.scale + ', ' + transform.scale + ')', 'rotate3d(' + transform.rx + ',' + transform.ry + ',' + transform.rz + ',' + transform.angle + 'deg)'];        value = value.join(' ');        if (_eImg != '') {          _eImg.style.webkitTransform = value;          _eImg.style.mozTransform = value;          _eImg.style.transform = value;          //_eImg.css({ 'transform': value }, { '-webkit-transform': value });        }        ticking = false;      }      function requestElementUpdate() {        if (!ticking) {          reqAnimationFrame(updateElementTransform);          ticking = true;        }      }      function onPan(ev) {        el.removeClass('animate');        transform.translate = {          x: ev.deltaX,          y: ev.deltaY        };      }      function onPinch(ev) {        if (ev.type == 'pinchstart') {          initScale = transform.scale || 1;        }        el.removeClass('animate');        transform.scale = initScale * ev.scale;        requestElementUpdate();        _eImg = ev.target;        return _eImg;      }      function onSwipe(ev) {        var angle = 10;        transform.ry = (ev.direction & Hammer.DIRECTION_HORIZONTAL) ? 1 : 0;        transform.rx = (ev.direction & Hammer.DIRECTION_VERTICAL) ? 1 : 0;        transform.angle = (ev.direction & (Hammer.DIRECTION_RIGHT | Hammer.DIRECTION_UP)) ? angle : -angle;        requestElementUpdate();        _eImg = ev.target;        return _eImg;      }      resetElement();

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持錯新站長站。