发布于 2015-08-14 15:16:40 | 88 次阅读 | 评论: 0 | 来源: 网络整理
这个事件将删除回调函数或一个对象的所有事件。
object.off(event, callback function, [context])
<!DOCTYPE html>
<head>
<title>Event Off Example</title>
<script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
//Here creating an object 'myVal' and extending with Backbone.Events method
var myVal = _.extend({name:'hello'}, Backbone.Events);
var myFunc = function () {
document.write('Hello');
};
var myFunc1 = function () {
document.write('Welcome to YiiBai');
};
//The on() method will bind the callback function to objects 'myFunc' and 'myFunc1'
myVal.on('log',myFunc);
myVal.on('log',myFunc1);
document.write('Before using off event, values will be: ');
//trigger() method callbacks for the given event and display the text defined in the 'myFunc' and 'myFunc1' functions
myVal.trigger('log');
//The off() method removes the callback for 'myFunc' and logs only text of 'myFunc1'
myVal.off('log',myFunc);
document.write("<br>");
document.write('After using off event, values will be: ');
myVal.trigger('log');
</script>
</body>
</html>
让我们进行以下步骤来看看上面的代码工作：
保存上述代码在文件off.html
在浏览器中打开这个HTML文件。