ArkTS创建多个Ability常见问题

1.先来创建流程总结

//1.1获取上下文
private context = getContext(this) as common.UIAbilityContext

//1.2指定要跳转到的UIAbility的信息
let want: Want = {
              deviceId: '',
              bundleName: 'com.example.myapplication',
              moduleName: 'entry',
              abilityName: 'DocumentAbility',
              parameters: {
                instanceKey: 'idx_' + this.index++
              }
            }

//1.3尝试拉起目标UIAbility实例
this.context.startAbility(want)

//2.在AbilityStage的生命周期回调中为目标UIAbility实例生成key
export default class MyAbilityStage extends AbilityStage {
  onAcceptWant(want: Want): string {
    if(want.abilityName === 'DocumentAbility'){
      return `DocAbilityInstance_${want.parameters.instanceKey}`
    }
    return ''
  }
}

//3.在module.json5配置文件中，通过srcEntry参数指定AbilityStage路径
{
  "module": {
    "name": "entry",
    "type": "entry",
    "srcEntry": './ets/myabilitystage/MyAbilityStage.ts',
     ...
  }
}

除了上述几个步骤外，还需要在module.json5配置文件中，通过launchType配置DocumentAbility的启动模式,如specified

  {
        "name": "DocumentAbility",
        "srcEntry": "./ets/documentability/DocumentAbility.ts",
        "description": "$string:DocumentAbility_desc",
        "icon": "$media:icon",
        "label": "$string:DocumentAbility_label",
        "startWindowIcon": "$media:icon",
        "startWindowBackground": "$color:start_window_background",
        "launchType": "specified"
      }

另外，在DocumentAbility的onWindowStageCreate修改需要加载的入口界面,将DocumentPage(默认是Index)替换成你要加载的界面。

  onWindowStageCreate(windowStage: window.WindowStage) {
    // Main window is created, set main page for this ability
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');

    windowStage.loadContent('pages/DocumentPage', (err, data) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }