使用 iOS 11 在 WKWebView 中自动播放 YouTube 视频 [英] Autoplay YouTube videos in WKWebView with iOS 11
问题描述
我想在我的应用中安装小型 YouTube 播放器.我发现被推荐的唯一方法是将带有 YouTube 播放器的网页嵌入到我的应用程序中.所以我使用 WKWebView 并加载了带有 autoplay 参数的嵌入 YouTube 播放器页面:https://www.youtube.com/embed/VUbsFtLkGN8?autoplay=1.
I want to have small YouTube player in my app. The only way i found to be recommended is embeding web page with YouTube player into my app. So i used WKWebView and loaded embed YouTube player page with autoplay parameter: https://www.youtube.com/embed/VUbsFtLkGN8?autoplay=1.
代码如下:
let webConfiguration = WKWebViewConfiguration()
let webView = WKWebView(frame: .zero, configuration: webConfiguration)
let youtubeURL = URL(string: "https://www.youtube.com/embed/VUbsFtLkGN8?autoplay=1")
webView.load(URLRequest(url: youtubeURL!))
此嵌入播放器 url 在桌面 Safari 中自动播放，但不会在移动 Safari 或 WKWebView 中自动播放.我可以强制 WKWebView 以某种方式自动播放视频吗?还是使用其他 YouTube 播放器网址?
This embed player url autoplays in desktop Safari, but does not autoplay in mobile Safari or WKWebView. Can i force WKWebView to autoplay video somehow? Or use another YouTube player url?
推荐答案
自上一个答案以来，iframe API 似乎发生了变化.我已根据 iframe API 参考WKWebView 更新了加载在 WKWebView 中的 HTML/a>.使用此代码，我设法在 iOS11 上的 WKWebView 中全屏自动播放 YouTube 视频.
It seems like the iframe API has changed since the time of the previous answer. I have updated the HTML that's loaded in the WKWebView based on the iframe API Reference. Using this code I managed to autoplay YouTube videos in fullscreen in a WKWebView on iOS11.
class YouTubeVideoPlayerVC: UIViewController {
@IBOutlet weak var videoPlayerView: WKWebView!
var videoURL:URL! // has the form "https://www.youtube.com/embed/videoID"
var didLoadVideo = false
override func viewDidLoad() {
super.viewDidLoad()
videoPlayerView.configuration.mediaTypesRequiringUserActionForPlayback = []
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
// Size of the webView is used to size the YT player frame in the JS code
// and the size of the webView is only known in `viewDidLayoutSubviews`,
// however, this function is called again once the HTML is loaded, so need
// to store a bool indicating whether the HTML has already been loaded once
if !didLoadVideo {
videoPlayerView.loadHTMLString(embedVideoHtml, baseURL: nil)
didLoadVideo = true
}
}
var embedVideoHtml:String {
return """
<!DOCTYPE html>
<html>
<body>
<!-- 1. The <iframe> (and video player) will replace this <div> tag. -->
<div id="player"></div>
<script>
var tag = document.createElement('script');
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
var player;
function onYouTubeIframeAPIReady() {
player = new YT.Player('player', {
height: '(videoPlayerView.frame.height)',
width: '(videoPlayerView.frame.width)',
videoId: '(videoURL.lastPathComponent)',
events: {
'onReady': onPlayerReady
}
});
}
function onPlayerReady(event) {
event.target.playVideo();
}
</script>
</body>
</html>
"""
}
}
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