解决了猪蹄对象喝观察者之间功能的耦合
var Observer = (function () {
var _message = {};
return {
regist : function (type,fn) {
if(typeof _message[type] === 'undefined'){
_message[type] = [fn];
} else {
_message[type].push(fn);
}
},
fire : function (type, args) {
if(!_messgaes[type]){
return;
}
var envents = {
type, args: args|| {}
}
let i = 0;
let len = _message[type].length;
for(; i< len; i++){
_message[type][i].call(null, envents);
}
},
remove : function (type, fn) {
if(_message[type] instanceof Array){
var i = -_message[type].length - 1;
for(;i>0;i--){
_messgaes[type][i] === fn && _messgaes[type].splice(i,1)
}
}
},
}
})();
