import { emitter } from '@kit.BasicServicesKit';
import { common } from '@kit.AbilityKit';
import { TipsDialog } from '@kit.ArkUI';// entryAbility.ets 在你的uiability中添加如下生命周期
onPrepareToTerminate() {// 开发者定义预关闭动作emitter.emit("windowWillDestroy")emitter.on("close",(data)=>{this.context.terminateSelf();})return true; // 已定义预关闭操作后，返回true表示UIAbility取消关闭
}// Index.ets:
@Entry
@Component
struct Page {@State message: string = 'Hello World';dialogControllerImage: CustomDialogController = new CustomDialogController({builder: TipsDialog({content: '想要关闭这个APP嘛?',primaryButton: {value: '取消',action: () => {console.info('Callback when the first button is clicked')},},secondaryButton: {value: '退出',role: ButtonRole.ERROR,action: () => {emitter.emit("close");console.info('Callback when the second button is clicked')}},onCheckedChange: () => {console.info('Callback when the checkbox is clicked')}}),})onPageShow(): void {emitter.on("windowWillDestroy", () => {let ablityContext = getContext() as common.UIAbilityContextablityContext.showAbility()console.log("yes")this.dialogControllerImage.open()})}build() {RelativeContainer() {Text(this.message).id('PageHelloWorld').fontSize(50).fontWeight(FontWeight.Bold).alignRules({center: { anchor: '__container__', align: VerticalAlign.Center },middle: { anchor: '__container__', align: HorizontalAlign.Center }})}.height('100%').width('100%')}
}