迭代视频中的视频

Question

谢谢你看我的问题。对于一个作业，我需要迭代5个视频在一个JQuery手风琴。我们需要创建自己的按钮，它们有自己的功能。现在我有5div和不同的视频，然而，当我想播放第二个视频，第一个视频将开始播放。第三、第四和第五视频也是如此。

问题：如何更改我的代码，以便每个播放按钮都能为每个不同的视频工作？我猜是JQuery的每个函数，但我不知道。

        <div id="video-wrap">
            <div id="accordion">
                <div class="acc-wrap"><img class="arrow" src="img/arrow.svg" alt="arrow">
                    <h3>Introduction</h3>
                </div>
                <div>
                    <div class="video-player" id="player-1">
                        <video id="my-video-1" class="video-js" preload="auto" width="1088px" height="612"
                            data-setup="{}">
                            <source src="http://techslides.com/demos/sample-videos/small.mp4" type="video/mp4" />
                            <p class="vjs-no-js">
                                To view this video please enable JavaScript, and consider upgrading to a
                                web browser that
                                <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5
                                    video</a>
                            </p>
                        </video>
                        <div class="player-buttons">
                            <a class="play-toggle" class="video-play">
                                <img class="pause" src="img/play-btn.svg" alt="pause button">
                                <img class="play" src="img/play-btn2.svg" alt="play button">
                            </a>
                            <a class="forward-btn">
                                <img src="img/forward btn.svg" alt="forward button">
                            </a>
                            <a class="rewind-btn">
                                <img src="img/rewind btn.svg" alt="forward button">
                            </a>
                        </div>
                    </div>
                </div>
                <div class="acc-wrap"><img class="arrow" src="img/arrow.svg" alt="arrow">
                    <h3>Daniel Shiffman: Coding Challenge 1</h3>
                </div>
                <div>
                    <div class="video-player" id="player-2">
                        <video id="my-video-2" class="video-js" preload="auto" width="1088px" height="612"
                            data-setup="{}">
                            <source src="video/citral.mp4" type="video/mp4" />
                            <p class="vjs-no-js">
                                To view this video please enable JavaScript, and consider upgrading to a
                                web browser that
                                <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5
                                    video</a>
                            </p>
                        </video>
                        <div class="player-buttons">
                            <a class="play-toggle" class="video-play">
                                <img class="pause" src="img/play-btn.svg" alt="pause button">
                                <img class="play" src="img/play-btn2.svg" alt="play button">
                            </a>
                            <a class="forward-btn">
                                <img src="img/forward btn.svg" alt="forward button">
                            </a>
                            <a class="rewind-btn">
                                <img src="img/rewind btn.svg" alt="forward button">
                            </a>
                        </div>
                    </div>
                </div>
                <div class="acc-wrap"><img src="img/arrow.svg" alt="arrow">
                    <h3>Daniel Shiffman: Coding Challenge 2</h3>
                </div>
                <div>
                    <div class="video-player" id="player-3">
                        <video controls id="my-video-3" class="video-js" preload="auto" width="1088px" height="612"
                            data-setup="{}">
                            <source src="https://player.vimeo.com/video/420225730" type="video/mp4" />
                            <p class="vjs-no-js">
                                To view this video please enable JavaScript, and consider upgrading to a
                                web browser that
                                <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5
                                    video</a>
                            </p>
                        </video>
                        <div class="player-buttons">
                            <a class="play-toggle" class="video-play">
                                <img class="pause" src="img/play-btn.svg" alt="pause button">
                                <img class="play" src="img/play-btn2.svg" alt="play button">
                            </a>
                            <a class="forward-btn">
                                <img src="img/forward btn.svg" alt="forward button">
                            </a>
                            <a class="rewind-btn">
                                <img src="img/rewind btn.svg" alt="forward button">
                            </a>
                        </div>
                    </div>
                </div>
                <div class="acc-wrap"><img src="img/arrow.svg" alt="arrow">
                    <h3>Daniel Shiffman: Coding Challenge 3</h3>
                </div>
                <div>
                    <div class="video-player" id="player-4">
                        <video controls id="my-video-4" class="video-js" preload="auto" width="1088px" height="612"
                            data-setup="{}">
                            <source src="https://player.vimeo.com/video/420225730" type="video/mp4" />
                            <p class="vjs-no-js">
                                To view this video please enable JavaScript, and consider upgrading to a
                                web browser that
                                <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5
                                    video</a>
                            </p>
                        </video>
                        <div class="player-buttons">
                            <a class="play-toggle" class="video-play">
                                <img class="pause" src="img/play-btn.svg" alt="pause button">
                                <img class="play" src="img/play-btn2.svg" alt="play button">
                            </a>
                            <a class="forward-btn">
                                <img src="img/forward btn.svg" alt="forward button">
                            </a>
                            <a class="rewind-btn">
                                <img src="img/rewind btn.svg" alt="forward button">
                            </a>
                        </div>
                    </div>
                </div>
                <div class="acc-wrap"><img src="img/arrow.svg" alt="arrow">
                    <h3>Daniel Shiffman: Coding Challenge 4</h3>
                </div>
                <div>
                    <div class="video-player" id="player-5">
                        <video controls id="my-video-5" class="video-js" preload="auto" width="1088px" height="612"
                            data-setup="{}">
                            <source src="https://player.vimeo.com/video/420225730" type="video/mp4" />
                            <p class="vjs-no-js">
                                To view this video please enable JavaScript, and consider upgrading to a
                                web browser that
                                <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5
                                    video</a>
                            </p>
                        </video>
                        <div class="player-buttons">
                            <a class="play-toggle" class="video-play">
                                <img class="pause" src="img/play-btn.svg" alt="pause button">
                                <img class="play" src="img/play-btn2.svg" alt="play button">
                            </a>
                            <a class="forward-btn">
                                <img src="img/forward btn.svg" alt="forward button">
                            </a>
                            <a class="rewind-btn">
                                <img src="img/rewind btn.svg" alt="forward button">
                            </a>
                        </div>
                    </div>
                </div>
            </div>
        </div>

// Play/pause toggle //
$('.play-toggle').click(function () {
    if ($('.acc-wrap').hasClass("ui-state-active")) {
        if (player.paused()) {
            player.play();
            $('.play').css({
                "visibility": "visible",
            });
            $('.pause').css({
                "visibility": "hidden",
            });
        } else {
            player.pause();
            $('.play').css({
                "visibility": "hidden",
            });
            $('.pause').css({
                "visibility": "visible",
            });
        };
    };
});

Answer 1

我建议学习更多关于、范围、和类/对象原型的知识。

jQuery代码的问题是存在多个.play-toggle类，而且您目前无法识别这个播放按钮所属的正确视频。

如果将event参数传递到单击处理程序以标识实际单击的项目，则可以开始进行范围分析。

$('.play-toggle').click(function (event) {
    console.log(event)
})

在这里，您可以识别父容器，查找视频并将其挂钩到play暂停函数中。不过，我建议采取另一种办法。

步骤1:创建一个VideoPlayer类以容纳所有VideoPlayer功能

class VideoPlayer {
    constructor(el) {
        this._el = el
        this._video = el.querySelector('video')
        this._playToggle = el.querySelector('.play-toggle')

        this.setupEventListeners()
    }

    setupEventListeners() {
        this._playToggle.addEventListener('click',() => {
            console.log(`play button clicked on element id ${this._el.id}`)
        })
    }
}

如果您对类不确定，请阅读它们，这里我们将视频播放器元素的范围限定为变量并将它们保存为变量，然后初始化一个监听您单击事件的事件侦听器。您将在这个类中存储所有视频播放器功能。

步骤2:遍历页面并识别所有潜在的视频播放器

let videoPlayers = document.querySelectorAll('.video-player')

在这里，我们知道所有的视频播放器都包装在父类video-player中，如果您console.log(videoPlayers)，您应该看到一个元素数组

步骤3.为每个元素创建VideoPlayer类的实例

videos.forEach(v => new VideoPlayer(v))

这将为您在VidePlayer中拥有的每个项创建一个新的videoPlayers类实例，现在如果单击play按钮，您将在play button clicked on element id (whatever id)控制台中看到一个日志。

再次在您的视频播放器类中，我将为您的按钮提供所有的逻辑，在这里您可以连接到任何您想要自定义视频播放器的HTML5视频事件。

请注意，您将不得不自己处理删除事件侦听器，这不是一个完整的答案，但应该给您足够的信息，如何解决您的问题。