Safari有時(shí)會因網(wǎng)站設(shè)置、自動播放行為及自身限製而強(qiáng)制視頻全屏播放，主要發(fā)生在iOS設(shè)備上。 1. Safari的自動播放策略強(qiáng)制全屏：iOS上視頻若帶聲音自動播放，常觸發(fā)全屏，蘋果此舉為防止噪音和節(jié)省資源；用戶可提前靜音、快速點(diǎn)擊屏幕或使用不強(qiáng)制自動播放的網(wǎng)站避免。 2. 視頻標(biāo)籤配置導(dǎo)致全屏：若網(wǎng)站未正確設(shè)置playsinline屬性，Safari將默認(rèn)全屏；開發(fā)者應(yīng)添加該屬性並測試，用戶則可反饋問題或改用其他瀏覽器。 3. iOS版本與瀏覽器差異影響播放行為：iOS 10 支持內(nèi)聯(lián)播放但依賴網(wǎng)站正確配置，舊版代碼可能導(dǎo)致行為不一致；頻繁遇此問題可嘗試更新系統(tǒng)。理解這些因素有助於預(yù)測和繞過該現(xiàn)象。

Safari sometimes plays videos in full screen automatically due to a combination of website settings, autoplay behavior, and Safari's own restrictions on video playback. This behavior is most common on iOS devices and can be frustrating if you're just trying to watch a video inline while browsing.

Here's why it happens and how to handle it:

1. Safari's Autoplay Policy Forces Full Screen

On iOS, Safari has strict rules about video autoplay. If a video starts playing automatically—especially with sound—it often jumps to full screen. Apple designed it this way to prevent unwanted noise and conserve resources.

• What triggers it: Videos that autoplay with sound are more likely to go full screen.
• How to avoid it:
  • Mute the video before it plays.
  • Tap the screen quickly when the video starts—this can sometimes stop the full-screen transition.
  • Use websites that respect user preferences by not forcing autoplay.

This restriction applies mostly to mobile Safari. On desktop versions, videos usually play inline without going full screen unless coded otherwise.

2. Video Tags Are Configured for Full Screen

Some websites embed videos using HTML5 <video></video> tags with specific attributes like webkit-playsinline or playsinline . If those attributes are missing or set incorrectly, Safari defaults to full screen.

• Playsinline vs. Not: On iOS, videos won't stay inline unless playsinline is explicitly set.
• What developers should do: Include playsinline and test playback behavior across iOS versions.
• What users can do: There's no direct fix unless you control the site code. You can report the issue to the website owner or use an alternative browser like Chrome, which sometimes handles inline playback differently.

3. iOS Version and Browser Differences Matter

The version of iOS you're running affects how Safari behaves with video playback. Older versions had stricter limitations, but newer ones offer better support for inline playback—assuming the website uses the correct settings.

• iOS 10 improvements: Starting from iOS 10, Safari allows inline playback as long as the video is muted or has the right attributes.
• Still inconsistent: Some sites haven't updated their code to match these standards, leading to unpredictable behavior.
• Try updating iOS: If you're seeing this issue frequently, make sure your device is running the latest OS version.

If you're a developer or someone embedding videos on a website, double-check your video tag setup and test across different iOS versions.

Basically, Safari forces videos to full screen mainly due to autoplay policies and how the video is embedded. It's not always easy to predict, but understanding these factors helps you know what to expect—and how to work around it.

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