Question

我在插件本身中调用公共方法时遇到了困难。我不确定是什么问题。我做错了什么？

(function($) {

    var MyPlugin = function(){

        /* PUBLIC */
        this.publicFunction = function() {
            // Do public things
        };

        /* PRIVATE */
        var privateFunction = function() {
            // Do private things

            // Call this one public function
            publicFunction(); // WANT THIS but doesn't work
        }
    };

    $.fn.myPlugin = function() {

        var myPlugin = new MyPlugin(options);

        // Binding click to public function
        $("a").bind('click', function(e){
            e.preventDefault();
            myPlugin.publicFunction($(this)); // AND WANT THIS but does
        });

        return myPlugin;
    };
})(jQuery);

Answer 1

您只需要能够在函数内引用MyPlugin的this对象，而不会丢失范围。为此，请将其分配给变量（名称无关紧要，典型约定为self）

var MyPlugin = function(){
    var self = this;
    ...
    var privatefunction = function () {
        self.publicFunction();
    }
...

Answer 2

在MyPlugin函数内部缓存对MyPlugin实例的引用：

var self = this;

然后在privateFunction内部调用publicFunction作为self的成员：

self.publicFunction();

问题是你已经将publicFunction定义为MyPlugin实例的成员，而不是全局（这是好的），但是你从不同的范围调用它，因为publicFunction不是全局的，你需要告诉javascript在哪里找到它。您无法使用this，因为在您调用它的上下文中，this不会指向MyPlugin实例

Answer 3

(function($) {

    var MyPlugin = function(options){

        /* PRIVATE - one copy for each instance */
        var options = $.extend({},options),
            privateFunction = function() {
                // Do private things
                // ...
                // Call this one public function
                this.publicFunction();
            };
    };

    // Shared by all MyPlugin instances;
    MyPlugin.prototype.publicFunction = function($element) {
            // Do public things
    };

    $.fn.myPlugin = function() {

        var myPlugin = new MyPlugin(options);

        // Binding click to public function
        $("a").bind('click', function(e){
            e.preventDefault();
            myPlugin.publicFunction($(this));
        });

        return myPlugin;
    };
})(jQuery);

jQuery插件 - 从插件中调用公共方法

3 个答案: