定义一个类 主要有两种方法，方法1是直接在类后面进行类的定义
com.tiantian.test.Person = function() {//定义一个对象
this.name = "默认名称";
this.age = 0;
this.country = "中国";
}
方法2是使用Ext自己定义的define方法进行定义：
Ext.define("com.tiantian.test.Person1",{
name: "person1",
age: 30
});
类的继承：
类的继承主要是在定义类的时候指定其extend属性指向其需要继承的类
代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>05_inherit.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<script type="text/javascript" src="../ext4/ext-all-debug.js"></script>
<script type="text/javascript">
Ext.onReady(function() {
Ext.namespace("com.tiantian.test");
com.tiantian.test.Person = function() {//定义一个对象
this.name = "默认名称";
this.age = 0;
this.country = "中国";
}
//也可以这样定义一个对象
Ext.define("com.tiantian.test.Person1",{
name: "person1",
age: 30
});
Ext.define("com.tiantian.test.Student",{
extend: "com.tiantian.test.Person",//表示继承自哪个类
constructor: function(name, age) {//构造方法
this.name = name;
this.age = age;
},
role: "学生",
country: "新加坡",
getRole: function() {
return this.role;
}
});
Ext.define("com.tiantian.test.Teacher",{
extend: "com.tiantian.test.Person",
country: "马来西亚",
role: "老师"
});
var student = new com.tiantian.test.Student("张三",3);
alert("name:"+student.name+" age:"+student.age+" role:"+student.role+student.getRole()+" country:"+student.country);
var person1 = new com.tiantian.test.Person1();
alert(person1.name);
var teacher = new com.tiantian.test.Teacher();
teacher.name = "李四";
teacher.age = 30;
alert("name:"+teacher.name+" age:"+teacher.age+" role:"+teacher.role+" country:"+teacher.country);
});
</script>
</head>
<body>
This is my HTML page. <br>
</body>
</html>
