補充更正:上述IOS不支援自動播放是指SAFARI
引述:Safari HTML5 Audio and Video Guide
In Safari on iOS (for all devices, including iPad), where the user may be on a cellular network and be charged per data unit, preload and autoplay are disabled. No data is loaded until the user initiates it.
在IOS上的SAFARI (包含所有裝置及IPAD) ,使用者可能處在付費的網路環境中,預載和自動播放是禁止的,沒有資料會被載入,除非使用者去初始化它(點擊播放)