HarmonyOS 软键盘弹出后又突然消失

当前所有的路由跳转推荐使用navigation

///Index.ets
import { TextInputPage } from './TextInputPage'

@Entry
@Component
struct Index {
  @Provide('NavPathStack') pageInfos: NavPathStack = new NavPathStack()
  @Builder
  PageMap(name: string, param: Object) {
    if (name === 'TextInputPage') {
      TextInputPage()
    }
  }
  build() {
    Navigation(this.pageInfos) {
      Button('1232').onClick(() => {
        this.pageInfos.pushPathByName('TextInputPage', '')
      })
    }
    .hideTitleBar(true)
    .mode(NavigationMode.Stack)
    .navDestination(this.PageMap)
  }
}
/// TextInputPage.ets
import inputMethod from '@ohos.inputMethod';
import { BusinessError } from '@ohos.base';
@Entry
@Component
export struct TextInputPage {
  //@Consume('pageInfos') pageInfos: NavPathStack;
  @State codeTxt: string = '';
  @State screenWidth: number = 0;
  private inputController: inputMethod.InputMethodController = inputMethod.getController();
  private isAttached: boolean = false;
  private keyboardStatus: number = 0; // 默认是none， 1是hide，2是show
  aboutToAppear(): void {
    console.info('ImsaKit aboutToAppear')
    this.screenWidth = 1080;
  }
  onPageShow(): void {
  }
  @Builder
  componentBuilder() {
    Column() {
      Blank().height(42)
      this.buildTitleName()
      Blank().height(38)
      this.buildNumTip()
      this.buildAEnterCodeInput()
      Blank().height(20)
    }
    .margin({ top: 10 })
    .borderRadius(8)
    .backgroundColor(Color.White)
  }
  @Builder
  buildTitleName() {
    Row() {
      Text() {
        Span('输入验证码')
          .fontSize(18)
          .fontWeight(600)
          .fontColor(Color.Black)
      }
    }.width('100%').justifyContent(FlexAlign.Start).padding({ left: 20, right: 20 })
  }
  @Builder
  buildNumTip() {
    Row() {
      Text() {
        Span('已发送至')
          .fontSize(12)
          .fontWeight(400)
          .fontColor(Color.Grey)
      }
      Blank().width(5)
      Text() {
        Span("182XXXXX055")
        .fontSize(12)
          .fontWeight(500)
          .fontColor(Color.Black)
      }
    }.width('100%').justifyContent(FlexAlign.Start).padding({ left: 20, right: 20 })

  }
  @Styles
  fancyUse(){
    .width((this.screenWidth - 110) / 6)
    .height("100%")
    .margin({ left: 5, right: 5 })
    .border({
      width: { bottom: 0.5 },
      color: { bottom: Color.Grey },
      style: { bottom: BorderStyle.Solid }
    })
  }
  @Builder
  buildAEnterCodeInput() {
    Flex({
      direction: FlexDirection.Row,
      alignItems: ItemAlign.Center,
      justifyContent: FlexAlign.SpaceBetween
    }) {
      Text(this.codeTxt[0])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
      Text(this.codeTxt[1])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
      Text(this.codeTxt[2])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
      Text(this.codeTxt[3])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
      Text(this.codeTxt[4])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
      Text(this.codeTxt[5])
        .fontSize(18)
        .fontWeight(600)
        .textAlign(TextAlign.Center)
        .fancyUse()
    }
    .backgroundColor(Color.White)
    .height(50)
    .margin({ left: 15, right: 15 })
    .id("customInput")
    .defaultFocus(true)
    .onVisibleAreaChange([0.0, 1.0], (isVisible: boolean, currentRatio: number) => {
      console.info('ImsaKit Test Text isVisible: ' + isVisible + ', currentRatio:' + currentRatio)
      if (isVisible && currentRatio >= 1.0) {
        console.info('ImsaKit Test Text is fully visible. currentRatio:' + currentRatio)
        if(!this.isAttached){
          this.attachAndListener();
        }else{
          console.info('in focus')
          focusControl.requestFocus('customInput')
        }
      }
      if (!isVisible && currentRatio <= 0.0) {
        console.info('ImsaKit Test Text is completely invisible.')
        // this.dettach()
      }
    })

    .onClick(async () => {
      console.info('ImsaKit keyboardStatus =' + this.keyboardStatus)
      if (this.isAttached && this.keyboardStatus != 2) {
        // 输入法配置项
        let textConfig: inputMethod.TextConfig = {
          inputAttribute: {
            textInputType: inputMethod.TextInputType.NUMBER,
            enterKeyType: inputMethod.EnterKeyType.GO
          }
        };

        // 控件绑定输入法
        await this.inputController.attach(true, textConfig)
        return
      }
    })

  }
  dettach() {
    this.inputController.off('insertText');
    this.inputController.off('deleteLeft');
    this.inputController.off('sendKeyboardStatus');
    this.inputController.detach((err: BusinessError) => {
      if (err) {
        console.error(Failed to detach: ${JSON.stringify(err)});
        return;
      }
      this.isAttached = false
      console.log('Succeeded in detaching inputMethod.');
    });
  }
  // 绑定和设置监听
  async attachAndListener() {
    // 输入法配置项
    let textConfig: inputMethod.TextConfig = {
      inputAttribute: {
        textInputType: inputMethod.TextInputType.NUMBER,
        enterKeyType: inputMethod.EnterKeyType.GO
      }
    };
    // 控件绑定输入法
    await this.inputController.attach(true, textConfig)
    console.info('come in')

    this.isAttached = true
    this.attachListener()
    console.info('attach succeed')

  }
  /**

   订阅输入法回调

   */
  attachListener(): void {
    // 订阅输入法应用插入文本事件
    this.inputController.on('insertText', (text) => {
      if (this.codeTxt.length >= 6) {
        return
      }
      this.codeTxt += text;
      console.info("this.inputText", "insertText this.inputText===" + this.codeTxt)
    })
    // 订阅输入法应用向左删除事件
    this.inputController.on('deleteLeft', (length) => {
      this.codeTxt = this.codeTxt.substring(0, this.codeTxt.length - length);
      console.info("this.inputText", "deleteLeft this.inputText===" + this.codeTxt)
    })

    // 订阅输入法应用发送输入法软键盘状态事件
    this.inputController.on('sendKeyboardStatus', (keyboardStatus: inputMethod.KeyboardStatus) => {
      this.keyboardStatus = keyboardStatus
      console.info("ImsaKit this.inputText keyboardStatus= " + this.keyboardStatus)
    })

  }
  build() {
    NavDestination() {
      Column() {
        this.componentBuilder()
      }
      .width('100%')
      .height('100%')
      .backgroundColor(Color.White)
      .padding({
        left: 10,
        right: 10,
        bottom: 60
      })
    }
    .hideTitleBar(false)
    .title("验证码")
    .size({ width: '100%', height: '100%' })
    .backgroundColor('#FFFFFF')
  }
}
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