javascript - 主干视图访问方法变量

Question

可能是一个简单的问题......如何访问backbone.js 视图中的变量？

initialize: function() { //all init here }
render: function() {//all render here }

printFoo: function(event) {
   var printVar = this.changeFoo.changeVar  // how do I access changeVar  here???
}

changeFoo: function(event) {
  var changeVar = $(e.currentTarget).attr('id');
}

如何访问 changeVar ？

Answer 1

简短的回答，你不能。

原因：changeVar是changeFoo.

您可以提升 changeVar成为外部对象的成员。在这种情况下，、和可以changeVar访问。initializerenderprintFoochangeFoo

function ConstructorFunctionName(){
    var changeVar = 'foo';
    /*this.changeVar = 'foo'; // this can also be used */

    this.initialize = function() { //all init here };
    this.render = function() { //all render here };

    this.printFoo = function(event) {
       var printVar = changeVar;
    };

    this.changeFoo = function(event) {
      this.changeVar = $(e.currentTarget).attr('id');
    };
}

http://jsfiddle.net/Njwdx/