HarmonyOS web网页中视频点击全屏时页面闪烁厉害

HarmonyOS

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2024-12-17 13:19:51

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zbw_apple

当前在Web里暂时不支持使用JS或CSS来实现横屏，需要ArkUI的媒体查询接口实现横屏，可以在Web的onFullScreenEnter和onFullScreenExit回调中监听是否点击全屏的按键，在这两个回调里使用媒体查询接口实现视频横向和竖向。

参考链接：

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/arkts-layout-development-media-query-V5

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-basic-components-web-V5

当网页视频横向后需要在H5中设置横向宽高来适配使页面全屏，媒体查询接口只是让手机横屏。

import web_webview from '@ohos.web.webview'
import mediaquery from '@ohos.mediaquery';
import window from '@ohos.window';
import common from '@ohos.app.ability.common';

@Entry
@Component
struct MediaQueryExample {

  @State color: string = '#DB7093';

  @State text: string = 'Portrait';

  @State portraitFunc:mediaquery.MediaQueryResult|void|null = null;

  handler: FullScreenExitHandler | null = null
  // 当设备横屏时条件成立

  listener:mediaquery.MediaQueryListener = mediaquery.matchMediaSync('(orientation: landscape)');

  controller: web_webview.WebviewController = new web_webview.WebviewController()

  onPortrait(mediaQueryResult:mediaquery.MediaQueryResult) {

    if (mediaQueryResult.matches as boolean) { // 若设备为横屏状态，更改相应的页面布局

      this.color = '#FFD700';

      this.text = 'Landscape';

    } else {

      this.color = '#DB7093';

      this.text = 'Portrait';

    }

  }

  aboutToAppear() {

    // 绑定当前应用实例

    // 绑定回调函数

    this.listener.on('change', (mediaQueryResult:mediaquery.MediaQueryResult) => { this.onPortrait(mediaQueryResult) });

  }

  // 改变设备横竖屏状态函数

  private changeOrientation(isLandscape: boolean) {

    // 获取UIAbility实例的上下文信息

    let context:common.UIAbilityContext = getContext(this) as common.UIAbilityContext;

    // 调用该接口手动改变设备横竖屏状态

    window.getLastWindow(context).then((lastWindow) => {

      lastWindow.setPreferredOrientation(isLandscape ? window.Orientation.LANDSCAPE : window.Orientation.PORTRAIT)

    });

  }

  build() {

    Column() {

      Web({ src: $rawfile('video.html'), controller: this.controller })

        .javaScriptAccess(true)

        .domStorageAccess(true)

        .onFullScreenEnter((event) => {

          console.log("onFullScreenEnter...")

          this.handler = event.handler

          this.changeOrientation(true);

        })

        .onFullScreenExit(() => {

          console.log("onFullScreenExit...")

          if (this.handler) {

            this.handler.exitFullScreen()

            this.changeOrientation(false);

          }

        })

    }

    .width('100%').height('100%')

  }

}
 
--------video.html----------


  <!DOCTYPE html>
  <html>
  <head>
  <title>浏览器全屏时横屏播放的demo</title>
  <style type="text/css">
  body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

video {
  width: 100%;
  height: 100%;
  object-fit: fill;
}
</style>
  </head>
  <body>
  <video src="https://xxx.mp4" autoplay controls></video>

  <script type="text/javascript">
  var video = document.querySelector('video');

// 进入全屏
function requestFullscreen() {
  video.webkitRequestFullscreen();
  return 1;
}

// 退出全屏
function exitFullscreen() {
  document.webkitExitFullscreen();
  return 0;
}

// 监听全屏变化事件
document.addEventListener('fullscreenchange', function() {
  if (document.fullscreenElement) {

    // 进入全屏时，将视频旋转90度-->
    video.style.transform = 'rotate(90deg)';
    video.style.width = '100vh';
    video.style.height = '100vw';
  } else {
    // 退出全屏时，将视频旋转回来-->
    video.style.transform = 'none';
    video.style.width = '100%';
    video.style.height = '100%';
  }
});

// 监听窗口大小变化事件
window.addEventListener('resize', function() {
  if (document.fullscreenElement) {
    // 窗口大小变化时，调整视频大小
    video.style.width = '100vh';
    video.style.height = '100vw';
  }
});

// 点击播放按钮时，进入全屏
video.addEventListener('play', function() {
  requestFullscreen();
  video.style.transform = 'rotate(90deg)';
  video.style.width = '100vh';
  video.style.height = '100vw';
});

// 点击退出按钮时，退出全屏
video.addEventListener('ended', function() {
  exitFullscreen();
});
</script>
  </body>
  </html>

2024-12-17 16:24:37

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HarmonyOS web网页中视频点击全屏时页面闪烁厉害

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