vue自定义指令实现v-tap插件

MyPlugin.install = function (Vue, options) {
 // 1. 添加全局方法或属性
 Vue.myGlobalMethod = ...
 // 2. 添加全局资源
 Vue.directive('my-directive', {})
 // 3. 添加实例方法
 Vue.prototype.$myMethod = ...
}

;(function () {

 var vueTouch = {}

 vueTouch.install = function (Vue) {

 Vue.directive('touch', {

  isFn: true,
  aeptStatement: true,

  bind: function () {

  },

  update: function (fn) {

  },

  unbind: function () {

  }
 })
 }

 if (typeof exports == "object") {
 module.exports = vueTouch
 } else if (typeof define == "function" && define.amd) {
 define([], function(){ return vueTouch })
 } else if (window.Vue) {
 window.VueTouch = vueTouch
 Vue.use(vueTouch)
 }

})()

;(function() {
 var vueTap = {};
 vueTap.install = function(Vue) {

 };

 if (typeof exports == "object") {
  module.exports = vueTap;
 } else if (typeof define == "function" && define.amd) {
  define([], function(){ return vueTap })
 } else if (window.Vue) {
  window.vueTap = vueTap;
  Vue.use(vueTap);
 }

})();

Vue.directive('tap', {
  isFn : true,
  bind : function() {

  },
  update : function(fn) {

  },
  unbind : function() {},
  isTap : function() {
   //判断是否为tap
  },
  touchstart : function(e,self) {

  },
  touchend : function(e,self) {

  }
 });
};

update : function(fn) {
 var self = this; //存下this，方便以后用
  //在directive上绑定的属性和方法
  //都可通过self.xxx self.touchstart()获取
  self.tapObj = {}; //初始化我们的tap对象

 if(typeof fn !== 'function') {
 //你别给我搞事！
  return console.error('The param of directive "v-tap" must be a function!');
 }

 self.handler = function(e) { //给当前directive存个handler方便之后调用
  e.tapObj = self.tapObj; 
  //把我们的tap对象赋值给原生event对象上，方便回调里获取参数
  fn.call(self,e);
 };

 //把我们的start和end剥离出来，写在directive上
 //由于只有tap事件，所以我们在move过程就不需要做处理
 this.el.addEventListener('touchstart',function(e) {
  self.touchstart(e,self);
 },false);

 this.el.addEventListener('touchend',function(e) {
  self.touchend(e,self,fn);
 },false);

}

isTap : function() {
 var tapObj = this.tapObj;
 return this.time < 150 && Math.abs(tapObj.distanceX) < 2 && Math.abs(tapObj.distanceY) < 2;
},
touchstart : function(e,self) {
 var touches = e.touches[0];
 var tapObj = self.tapObj;
 tapObj.pageX = touches.pageX;
 tapObj.pageY = touches.pageY;
 tapObj.clientX = touches.clientX;
 tapObj.clientY = touches.clientY;
 self.time = +new Date();
},
touchend : function(e,self) {
 var touches = e.changedTouches[0];
 var tapObj = self.tapObj;
 self.time = +new Date() - self.time;
 tapObj.distanceX = tapObj.pageX - touches.pageX;
 tapObj.distanceY = tapObj.pageY - touches.pageY;

 if (self.isTap(tapObj))
  self.handler(e);
}

<ul>
 <li v-for="el in list"
  v-tap="args($index,el,$event)"
   >
  {{el.name}}---{{el.age}}
 </li>
</ul>