javascript - Backbone 和 bindAll : "func is undefined"

Question

我在使用 bindAll 时遇到问题。我收到的错误是 func is undefined。对我做错了什么有什么想法吗？

我都试过了

• bindAll(因上述错误而失败)和
• 个人 bind(不工作)

window.test = Backbone.View.extend({

  collection: null

  initialize: ->
    console.log('initialize()')
    console.log(this)
    # _.bindAll(this, ["render", "foo"])
    _.bind(this.render, this) # these don't throw errors, but binding won't work
    _.bind(this.foo, this) 
    @collection = new Backbone.Collection()
    @collection.bind "add",     @render
    @collection.bind "add",     @foo
    @render()

  foo: ->
    # won't be bound to the view when called from the collection
    console.log("foo()")
    console.log(this)
    console.log(this.collection) # undefined (since this is the collection, not the view)

  render: ->
    console.log("render()")
    console.log(this)
    return this

})
testInstance = new window.test();
# using _.bind instead of bindAll we get past this point, however this won't be the view
testInstance.collection.add({})

Answer 1

你正在使用 CoffeeScript，你不需要下划线的绑定(bind)。 CoffeeScript 内置了它。只需使用“粗箭头”

foo: =>
    #Your foo implementation goes here
render: =>
    # your render implementation goes here

在这里搜索“fat arrow”:http://jashkenas.github.com/coffee-script/

但是，关于 _.bindAll，您不需要以数组形式提供方法名称。您可以执行 _.bindAll(this) 或 _.bindAll(this, 'render', 'foo') (方法名称是 var args，而不是显式列表).看看是否有帮助。