苹果cmsv10为什么播放器不能全屏？

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3. <li>如果播放器被包含在 iframe 里，尝试在 iframe 上添加 allowfullscreen 属性。</li><li>为了完善的浏览器兼容性，它应该是这样：</li><li><iframe src="example.com" allowfullscreen="allowfullscreen" mozallowfullscreen="mozallowfullscreen" msallowfullscreen="msallowfullscreen" oallowfullscreen="oallowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></iframe></li>
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