返回值:undefinedcallbacks.lock()

V1.7概述

锁定在其当前状态的回调列表。

示例

描述:

用 callbacks.lock()锁定一个回调列表，以避免进一步的修改列表状态 :

jQuery 代码:

// a sample logging function to be added to a callbacks list
var foo = function( value ){
    console.log( "foo:" + value);
}

var callbacks = $.Callbacks();

// add the logging function to the callback list
callbacks.add( foo );

// fire the items on the list, passing an argument
callbacks.fire( "hello" );
// outputs "foo: hello"

// lock the callbacks list
callbacks.lock();

// try firing the items again
callbacks.fire( "world" );

// as the list was locked, no items
// were called so "world" isn"t logged