HarmonyOS鸿蒙Next中关于自定义弹窗的封装调用

可以参考以下用例：

@CustomDialog

struct CustomDialogExample {

  textContent: string = ''

  dialogController: CustomDialogController = new CustomDialogController({
    builder: CustomDialogExample(),
  })

  build() {
    Column() {
      Text(this.textContent)
        .fontSize(20)
        .margin({ top: 10, bottom: 10 })
    }
  }
}

@Entry
@Component
struct Index {

  @Builder
  ButtonShowToast(buttonText: string, content: string) {
    Button(buttonText)
      .onClick(() => {
        let dialogController: CustomDialogController = new CustomDialogController({
          builder: CustomDialogExample({ textContent: content }),
        })
        dialogController.open()
      })
  }

  build() {
    Row() {
      Column() {
        this.ButtonShowToast('test1', '加载中1...')
        this.ButtonShowToast('test2', '加载中2...')
      }
    }
  }
}

弹框不支持在类中定义。可以参考以下步骤：

1. 封装1个弹框实例类CustomDialogLayou.ets

@CustomDialog
export struct CustomDialogLayout {
  controller?: CustomDialogController

  build() {
    Flex({ alignContent: FlexAlign.Center, justifyContent: FlexAlign.Center }) {
      Text('加载中...')
        .fontSize(20)
        .margin({ top: 10, bottom: 10 })
    }
  }
}

1. 在window的入口page（比如Index.ets）里import并创建实例

import { CustomDialogLayout } from './CustomDialogLayout'
private dialogController: CustomDialogController | null = new CustomDialogController({
  builder: CustomDialogLayout({}),
})

1. 在MainAbility.ts的onCreate方法里通过AppStorage定义关于弹框显示的全局属性，默认false不显示

AppStorage.setOrCreate('showGlobalCustomDialog', false)

1. 在Index.ets里监听此属性值改变并进行拉起动作

@StorageLink('showGlobalCustomDialog') @Watch('globalCustomDialogStateChange') showGlobalCustomDialog: boolean = false

globalCustomDialogStateChange() {
  if (this.showGlobalCustomDialog) {
    if (this.dialogController != null) {
      this.dialogController.open()
      AppStorage.setOrCreate('showGlobalCustomDialog', false)
    }
  }
}

1. 在需要调用的页面设置全局属性为true即可调起弹框

AppStorage.setOrCreate('showGlobalCustomDialog', true)

目前您说的这种方法暂时无法满足，目前可以通过promptAction.openCustomDialog实现全局拉起，demo如下：

1. 新建GlobalContext.ets工具类

export class GlobalContext {
  private constructor() {}

  private static instance: GlobalContext;
  private _objects = new Map<string, Object>();

  public static getContext(): GlobalContext {
    if (!GlobalContext.instance) {
      GlobalContext.instance = new GlobalContext();
    }
    return GlobalContext.instance;
  }

  getObject(value: string): Object | undefined {
    return this._objects.get(value);
  }

  setObject(key: string, objectClass: Object): void {
    this._objects.set(key, objectClass);
  }
}

1. 新建DialogUtils.ets工具类

import { promptAction } from '@kit.ArkUI'
import { GlobalContext } from './GlobalContext'

let customDialogId: number = 0

@Builder
export function customDialogBuilder(content: String) {
  Column() {
    Text(`Tip: ${content}`).fontSize(20).height("30%")
    Text('失败原因：失败原因失败原因失败原因失败原因失败原因失败原因失败原因!').fontSize(16).height("30%")
    Row() {
      Button("确认").onClick(() => {
        promptAction.closeCustomDialog(customDialogId)
      })
      Blank().width(50)
      Button("取消").onClick(() => {
        promptAction.closeCustomDialog(customDialogId)
      })
    }
    .margin({ top: 30 })
  }.height(200).padding(5)
}

export function testPromptDialog() {
  const that = GlobalContext.getContext().getObject('UIContext') as UIContext;
  if (that) {
    promptAction.openCustomDialog({
      builder: customDialogBuilder.bind(that, "网络请求失败！")
    }).then((dialogId: number) => {
      customDialogId = dialogId;
    })
  }
}

1. 页面入口调用

import { GlobalContext } from '../uitls/GlobalContext'
import { testPromptDialog } from '../uitls/DialogUtils'

@Entry
@Component
struct Index {
  aboutToAppear(): void {
    GlobalContext.getContext().setObject('UIContext', this)
  }

  build() {
    Row() {
      Column() {
        Button("promptAction弹窗")
          .onClick(() => {
            testPromptDialog()
          })
      }
    }
    .width('100%')
  }
  .height('100%')
}