jQuery each()闭包-如何访问外部变量 [英] jQuery each() closure - how to access outside variable

问题描述

从$ .each()中访问我的this.rules变量的最佳方法是什么?为什么/如何做的任何解释也会有所帮助！

What's the best way to access my this.rules variable from within $.each()? Any explanation of why/how would also be helpful!

app.Style = function(node) {
    this.style = node;
    this.rules = [];
    var ruleHolder = node.find('Rule');

    $.each(ruleHolder, function(index, value) {
        var myRule = new app.Rule($(ruleHolder[index]));
        this.rules.push(myRule);
    });

    console.log(this.rules)
}

推荐答案

存储对this的引用-例如，在调用.each()之前将其命名为self，然后使用访问rules self.rules:

Store a reference to this -- name it self, for example --, before calling .each(), and then access rules using self.rules:

app.Style = function(node) {
    this.style = node;
    this.rules = [];
    var ruleHolder = node.find('Rule');

    var self = this;
    $.each(ruleHolder, function(index, value) {
        var myRule = new app.Rule($(ruleHolder[index]));
        self.rules.push(myRule);
    });

    console.log(this.rules)
}

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