我想定义一个javascript类,在我的html页面中实例化它的一个实例,然后让类设置一个click处理程序,然后使用setTimeout(...)来调用该类的成员函数。
这对我来说当前没有用,因为我很难理解我的类的范围和/或对所创建对象的调用和使用的正确方法。我希望有人可以帮我解决下面的例子。
下面的代码有一些对$(...)的引用,这是jquery,只是为了澄清那些可能会读到这个而不能识别它的人。
我在 JavaScript 代码中使用以下内容作为类的基础:
// Taken from http://www.htmlgoodies.com/html5/tutorials/create-an-object-oriented-javascript-class-constructor.html
// Base class from which we can derive our own classes with ease
var Class = function (methods) {
var klass = function () {
this.initialize.apply(this, arguments);
};
for (var property in methods) {
klass.prototype[property] = methods[property];
}
if (!klass.prototype.initialize) klass.prototype.initialize = function () { };
return klass;
};
然后我在 JavaScript 中使用我的课程进行扩展:
var myNamespace = myNamespace || {};
myNamespace.myClass = Class({
somevalue: 100,
initialize: function(somevalue) {
this.somevalue = somevalue;
$("#searchclear").click(function () {
setTimeout(myFunction,1000); // THIS DOES NOT WORK as the context is now the searchclear html element
myFunction(); // For completeness, this would not work either for the same reason
});
}),
myFunction: function() {
alert('we are ok');
}
});
我的 HTML 看起来像这样:
<body>
...
<script>
$(document).ready(function () {
var myInstance = new myNamespace.myClass(123);
});
</script>
<span id='searchclear'>CLICK ME</span>
...
</body>
问题是,如何在单击“searchclear”HTML对象时调用的单击处理程序中对myFunction进行两次调用?
答案 0 :(得分:1)
你试过了吗??
myNamespace.myClass = Class({
somevalue: 100,
var self = this;
initialize: function(somevalue) {
this.somevalue = somevalue;
$("#searchclear").click(function () {
setTimeout(self.myFunction,1000); // THIS DOES NOT WORK as the context is now the searchclear html element
self.myFunction(); // For completeness, this would not work either for the same reason
});
}),
self.myFunction: function() {
alert('we are ok');
}
});