问题描述
我在使用 bindAll 时遇到了问题.我得到的错误是 func 未定义.对我做错了什么有什么想法吗?
I've got problems using bindAll. The error I get is func is undefined. Any thoughts on what I'm doing wrong?
我都试过了
bindAll(因上述错误而失败)和- 单独的
绑定s(不工作)
bindAll(fails with the above error) and- individual
binds (don't work)
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({})
推荐答案
你使用的是 CoffeeScript，你不需要下划线的绑定.CoffeeScript 内置了它.只需使用胖箭头"
You are using CoffeeScript, you don't need underscore's bind. CoffeeScript has it built in. Just use "fat arrows"
foo: =>
#Your foo implementation goes here
render: =>
# your render implementation goes here
在此处搜索胖箭头":http://jashkenas.github.com/coffee-script/
但是，对于 _.bindAll，您不需要将方法名称作为数组提供.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).看看有没有帮助.
However, with regards to _.bindAll, you don't need to provide the method names as an array. You can do either _.bindAll(this) or _.bindAll(this, 'render', 'foo') (method names are var args, not an explicit list). See if that helps.
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