angular.js - 指令交互问题，未找到依赖指令

Question

我在appContent指令内调APPLeft。提示这个错误：Controller 'appLeft', required by directive 'appContent', can't be found!

appLeft存在的为什么提示这个

Answer 1

I found the answer on stackoverflow. You must put app-content in app-left to use it this way, that is:

<app-left>
    <app-content></app-content>
</app-left>