[Bug Report]各组件存在大量内存泄漏

[yangdan8]

Environment

vue2.x

Reproduction link

https://github.com/iview/iview

Steps to reproduce

各组件内部$on之后在组件注销的时候并未$off

What is expected?

各组件内部$on之后在组件注销的时候需要$off

What is actually happening?

并未$off

[iview-bot]

Translation of this issue:

Environment

Vue2.x

Reproduction link

https://github.com/iview/iview

Steps to reproduce

When the components are written off, the components are not $off after the internal $on

What is expected?

After the component $on is written off in the component, $off is required

What is actually happening?

No $off

[icarusion]

你真的有测试过吗，有测试数据吗

[ckpiggy]

It is interesting that vue will remove all listener when $destroy.
And the document mentioned that

[tivonheng]

赞同，尤其是table组件，简直不能忍