Javascript 面向对象编程使用接口的方法-优快云博客

本文链接：https://blog.youkuaiyun.com/beattwo/article/details/83492925

本文介绍了一种使用JavaScript自定义接口的方式，并通过一个示例展示了如何验证对象是否实现了指定接口的方法。该方法通过构造函数创建接口并检查目标对象是否包含所有必需的方法。

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var Interface = function(interfaceName,interfaceMethods){
	if(arguments.length!=2){
		alert("Interface expected  2 arguments,one is for Interface Name, and the other is the Array for methods ")
	}

	this.interfaceName = interfaceName;
	this.interfaceMethods = new Array();
	for(var i = 0;i < interfaceMethods.length;i++){
		if(typeof interfaceMethods[i] !== "string"){
			alert("Interface constructor expects each method name to be passed in as a string");   
			break;
		}
		this.interfaceMethods.push(interfaceMethods[i])
	}
}

Interface.CheckImplements = function(object,interfaces){
	if(arguments.length!=2){
		alert("Interface expected  2 arguments,one is for Interface Name, and the other is the Array for methods ")
	}

	for(var i=0;i,i<interfaces.length;i++){
		//alert(interfaces[i])
		if(interfaces[i].constructor !== Interface){
			alert("the interface expects to be created from Interface")
			break;
		}
		var interface = interfaces[i];
		for(var j=0;j<interface.interfaceMethods.length;j++){
			method = interface.interfaceMethods[j];
			if(!object[method]||(typeof object[method]!="function")){
				alert("object for the method '"+method+ " ' is not found for Interface '"+ interface.interfaceName+ " '")
				break;
			}
		}
	}
}

var PersonInterface = new Interface("PersonInterface",["display","walk","eat","shout"])  //定义一个接口

var Person = function(){

	this.display = function(){

	}

	this.eat = function(){

	}

	this.shout = function(){

	}
}
 person = new Person();
 Interface.CheckImplements(person,[PersonInterface]) 
//会弹出对话框object for the method 'walk ' is not found for Interface 'PersonInterface '

//注明，这似乎要在Person对象被创建后才能检测，这相当于后绑定，用一个函数来检测，这似似乎是一个缺陷，如何使用早期绑定，这正是要研究的一个题目。