//声明Person类，并定义初始化方法
var Person = Class.create({
initialize: function(name) {
this.name = name;
},
say: function(message) {
return this.name + ': ' + message;
}
});
// when subclassing, specify the class you want to inherit from
var Pirate = Class.create(Person, {
// redefine the speak method
//注意这里的$super用法，在对照源码中的解释仔细看一下
say: function($super, message) {
return $super(message) + ', yarr!';
}
});
var john = new Pirate('Long John');
john.say('ahoy matey');
// -> "Long John: ahoy matey, yarr!"
复制代码 代码如下:
var john = new Pirate('Long John');
john.sleep();
// -> ERROR: sleep is not a method
// every person should be able to sleep, not just pirates!
//这里是addMethods的用法，可以在类级别扩充方法
Person.addMethods({
sleep: function() {
return this.say('ZzZ');
}
});
john.sleep();
复制代码 代码如下:
//这里是superclass和subclasses两个属性的用法
Person.superclass
// -> null
Person.subclasses.length
// -> 1
Person.subclasses.first() == Pirate
// -> true
Pirate.superclass == Person
// -> true