错误时发生成员事件:断言失败:调用时没有有效的事件名称

你可以这样使用它:

import { on } from '@ember/object/evented';

export default Controller.extend(Evented, {
  init() {
    this._super(...arguments);
    this.trigger('greet');
  },

  myGreetImplementation: on('greet', function() {
    console.log('hello');
  })
});

另一个示例:使用服务管理用户设置并订阅更改:

export default Service.extend(Evented, {
  ...
  changeProfilePicture() {
    ...
    this.trigger('profilePictureChanged', ... event parameters ...);
  }
});

on 方法:

 export default Controller.extend({
  userSettings: service(),

  init() {
    this._super(...arguments);
    this.get('userSettings').on('profilePictureChanged', this, this.profilePictureChanged);
  },

  profilePictureChanged(... event parameters ...) {
   ...
  }
});

https://github.com/emberjs/ember.js/blob/6fc89cdf13124d88b8ae6adf99bb02a8c0cdf508/packages/ember-metal/lib/events.ts#L211 (您可以只在github搜索中粘贴错误消息,或者使用调试器了解有关失败原因的更多信息)

import Ember from 'ember';
import { inject as service } from '@ember/service';
import { on } from '@ember/object/evented';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  myService: service(),
  init() {
    this._super(...arguments);
    this.get('myService').on('mycall', this, this.mycallHandler);
  },
  mycallHandler: on('mycall', function() {
    console.log('here we are');
  })
});