HarmonyOS web网页中视频点击全屏时页面闪烁厉害

HarmonyOS

put_get

2024-12-17 13:19:51

浏览

回答 1

按赞同

按时间

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>
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91.
92.
93.
94.
95.
96.
97.
98.
99.
100.
101.
102.
103.
104.
105.
106.
107.
108.
109.
110.
111.
112.
113.
114.
115.
116.
117.
118.
119.
120.
121.
122.
123.
124.
125.
126.
127.
128.
129.
130.
131.
132.
133.
134.
135.
136.
137.
138.
139.
140.
141.
142.
143.
144.
145.
146.
147.
148.
149.
150.
151.
152.
153.
154.
155.
156.
157.
158.
159.
160.
161.
162.
163.
164.
165.
166.
167.
168.
169.
170.
171.
172.
173.
174.
175.
176.
177.
178.
179.
180.
181.
182.
183.
184.
185.
186.
187.
188.
189.

2024-12-17 16:24:37

如何写精华回答，获更多曝光？

发布

51CTO

51CTO博客

51CTO学堂

HarmonyOS web网页中视频点击全屏时页面闪烁厉害

订阅鸿蒙技术特刊，精选内容抢先看