34

我在这里看到了很多关于这个问题的帖子，但仍然找不到这个问题的完美答案。

所以我有一个表格视图，每个单元格里面都有一个播放按钮。当用户点击播放按钮时，我UIWebView会在此单元格中添加一个，然后播放 YouTube 视频。 

static NSString *youTubeVideoHTML = @"<html>\
    <body style=\"margin:0;\">\
        <iframe class=\"youtube-player\" type=\"text/html\" width=\"%0.0f\" height=\"%0.0f\" src=\"http://www.youtube.com/embed/%@\" frameborder=\"0\">\
        </iframe>\
    </body>\
    </html>";


- (void)playVideoWithId:(NSString *)videoId {
    NSString *html = [NSString stringWithFormat:youTubeVideoHTML, self.frame.size.width, self.frame.size.height, videoId];

    [self loadHTMLString:html baseURL:nil];
}

问题：

这段代码实际上并没有像我想要的那样播放视频，它只是启动 YouTube 播放器并使用 YouTube 红色播放按钮显示它。只有当用户点击红色按钮时，视频才会开始播放。
所以用户必须点击两个按钮，直到视频开始 - 这不是最好的用户体验......

就像我说的，我看到了很多关于这个问题的帖子，有些根本不起作用，有些有效，但有些问题让我很困扰。

我在@ilias的这篇文章中找到了一个可行的解决方案，他展示了如何通过从文件中加载 HTML（而不是像我这样的字符串）来实现这一点，这个方法的问题是对于我播放的每个视频我需要：
加载 htm 文件 -> 将视频 ID 嵌入其中 -> 将文件写入光盘 -> 只有现在我才能播放视频。

奇怪的是，此解决方案仅在您从文件加载 Web 视图请求时才有效，如果我尝试从等于文件内容的字符串加载请求，则不起作用。

4

5 回答 5

49

显然问题出在 nil 基本 url 上，当我将其更改为 resourceURL 时，自动播放起作用了。

[self loadHTMLString:html baseURL:[[NSBundle mainBundle] resourceURL]];

自动播放 youtube 视频的完整代码（此代码主要基于这篇文章，我只是将其更改为从字符串而不是文件加载）： 

static NSString *youTubeVideoHTML = @"<!DOCTYPE html><html><head><style>body{margin:0px 0px 0px 0px;}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = \"http://www.youtube.com/player_api\"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player', { width:'%0.0f', height:'%0.0f', videoId:'%@', events: { 'onReady': onPlayerReady, } }); } function onPlayerReady(event) { event.target.playVideo(); } </script> </body> </html>";  

- (void)playVideoWithId:(NSString *)videoId {
    NSString *html = [NSString stringWithFormat:youTubeVideoHTML, self.frame.size.width, self.frame.size.height, videoId];

    [self loadHTMLString:html baseURL:[[NSBundle mainBundle] resourceURL]];
}
于 2013-03-30T18:04:29.937 回答
14

这里的关键是playsinline=1在你的 iFrame 播放器中设置，allowsInlineMediaPlayback = true并且mediaPlaybackRequiresUserAction = false为你的UIWebView. 这是我在 Swift 中的实现：

// Set up your UIWebView
let webView = UIWebView(frame: self.view.frame) // or pass in your own custom frame rect

self.view.addSubview(webView)
self.view.bringSubviewToFront(webView)

// Set properties
webView.allowsInlineMediaPlayback = true
webView.mediaPlaybackRequiresUserAction = false

// get the ID of the video you want to play
let videoID = "zN-GGeNPQEg" // https://www.youtube.com/watch?v=zN-GGeNPQEg

// Set up your HTML.  The key URL parameters here are playsinline=1 and autoplay=1
// Replace the height and width of the player here to match your UIWebView's  frame rect
let embededHTML = "<html><body style='margin:0px;padding:0px;'><script type='text/javascript' src='http://www.youtube.com/iframe_api'></script><script type='text/javascript'>function onYouTubeIframeAPIReady(){ytplayer=new YT.Player('playerId',{events:{onReady:onPlayerReady}})}function onPlayerReady(a){a.target.playVideo();}</script><iframe id='playerId' type='text/html' width='\(self.view.frame.size.width)' height='\(self.view.frame.size.height)' src='http://www.youtube.com/embed/\(videoID)?enablejsapi=1&rel=0&playsinline=1&autoplay=1' frameborder='0'></body></html>"

// Load your webView with the HTML we just set up
webView.loadHTMLString(embededHTML, baseURL: NSBundle.mainBundle().bundleURL)
于 2015-06-25T21:22:54.257 回答
8

这是完整的解决方案：

//
//  S6ViewController.m
//  
//
//  Created by Ökkeş Emin BALÇİÇEK on 11/30/13.
//  Copyright (c) 2013 Ökkeş Emin BALÇİÇEK. All rights reserved.
//

#import "S6ViewController.h"

@interface S6ViewController ()

@end

@implementation S6ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    [self playVideoWithId:@"sLVGweQU7rQ"];

}




- (void)playVideoWithId:(NSString *)videoId {

     NSString *youTubeVideoHTML = @"<html><head><style>body{margin:0px 0px 0px 0px;}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = 'http://www.youtube.com/player_api'; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player', { width:'768', height:'1024', videoId:'sLVGweQU7rQ', events: { 'onReady': onPlayerReady } }); } function onPlayerReady(event) { event.target.playVideo(); } </script> </body> </html>";

    NSString *html = [NSString stringWithFormat:youTubeVideoHTML, videoId];

    UIWebView *videoView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 768, 1024)];
    videoView.backgroundColor = [UIColor clearColor];
    videoView.opaque = NO;
    //videoView.delegate = self;
    [self.view addSubview:videoView];

    videoView.mediaPlaybackRequiresUserAction = NO;

    [videoView loadHTMLString:youTubeVideoHTML baseURL:[[NSBundle mainBundle] resourceURL]];
}

@end
于 2013-11-30T18:29:46.603 回答
4 
- (void)playVideoWithId:(NSString *)videoId {

NSString *youTubeVideoHTML = @"<html><head><style>body{margin:0px 0px 0px 0px;}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = 'http://www.youtube.com/player_api'; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player', { width:'768', height:'1024', videoId:'%@', events: { 'onReady': onPlayerReady } }); } function onPlayerReady(event) { event.target.playVideo(); } </script> </body> </html>";

NSString *html = [NSString stringWithFormat:youTubeVideoHTML, videoId];

UIWebView *videoView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 300)];
videoView.backgroundColor = [UIColor clearColor];
videoView.opaque = NO;
//videoView.delegate = self;
[self.view addSubview:videoView];

videoView.mediaPlaybackRequiresUserAction = NO;

[videoView loadHTMLString:html baseURL:[[NSBundle mainBundle] resourceURL]];
}

我对上面的代码做了一些更正。

于 2014-08-08T19:32:39.570 回答
2

使用以下代码在UIWebView

在这里，我们需要“嵌入链接”：

  • 只需在浏览器中打开您的 youtube 链接
  • 右键点击视频
  • 选择“获取嵌入代码”选项

  • 你会得到像 -

    <iframe width="640" height="390" src="https://www.youtube.com/embed/xtNXZA4XMBY" frameborder="0" allowfullscreen></iframe>

  • 复制“src”字段中的链接，这是您的嵌入链接

    现在只需将此嵌入链接放在以下代码中的“YOU_TUBE LINK”位置：

    NSString *htmlString = [NSString stringWithFormat:@"<html><head><meta name = \"viewport\" content = \"initial-scale = 1.0, user-scalable = yes, width = 320\"/></head><body style=\"background:#00;margin-top:0px;margin-left:0px\"><div><object width=\"320\" height=\"480\"><param name=\"movie\" value=\"YOUTUBE_LINK\"></param><param name=\"wmode\" value=\"transparent\"></param><embed src=\"YOUTUBE_LINK\"type=\"application/x-shockwave-flash\" wmode=\"transparent\" width=\"320\" height=\"480\"></embed></object></div></body></html>"];

[self.webView_youTube loadHTMLString:htmlString baseURL:nil];
于 2015-06-15T05:58:27.900 回答