PHP implements background music playing skills of WeChat applet

With the rapid popularity of WeChat mini programs in the mobile application market, more and more developers have begun to get involved in the field of mini program development. Mini programs can provide users with a variety of functions, such as displaying products, publishing articles, and playing videos, but adding background music to mini programs is also a popular feature, especially for the retail and entertainment industries. This article will introduce how to play background music in WeChat applet.

1. Understand the basic concepts

Before you start writing code, you first need to understand some basic concepts. The audio component in the WeChat applet consists of "background-audio-manager", which can play, pause, stop and loop background music, and can also obtain audio information and manage audio time. Using the "background-audio-manager" component, you can implement an independent background music playback function in the WeChat applet.

2. Create an audio management object

First, you need to use the wx.getBackgroundAudioManager() method to create an audio management object, which can play audio and provide some related information. The following is a code example for creating an audio management object:

const backgroundAudioManager = wx.getBackgroundAudioManager()

3. Set audio source

Next, you need to add an audio source to the audio management object and make related settings. For example, set the audio attributes such as title, artist, album name, cover image, audio link, and repeat playback. The following is a code example for setting the audio source:

// 设置音频源
backgroundAudioManager.title = '背景音乐'
backgroundAudioManager.singer = '歌手'
backgroundAudioManager.coverImgUrl = '封面图片链接'
backgroundAudioManager.src = '音频链接'
backgroundAudioManager.loop = true // 重复播放

4. Audio playback control

The audio management object provides a series of audio playback control methods. For example, play, pause, stop, jump, get playback status, etc. The following is a code example for audio playback control:

// 播放音频
backgroundAudioManager.play()

// 暂停音频
backgroundAudioManager.pause()

// 停止音频
backgroundAudioManager.stop()

// 跳转音频
backgroundAudioManager.seek(100)

// 获取播放状态
backgroundAudioManager.onPlay(() => {
  console.log('开始播放')
})

5. Add audio events

In order to better control the playback and status of audio, you can add some events to the audio management object , such as audio playback, audio pause, audio stop, audio error, time update, etc. The following is a code example for adding events to the audio management object:

// 音频播放事件
backgroundAudioManager.onPlay(() => {
  console.log('开始播放')
})

// 音频暂停事件
backgroundAudioManager.onPause(() => {
  console.log('暂停播放')
})

// 音频停止事件
backgroundAudioManager.onStop(() => {
  console.log('停止播放')
})

// 音频播放错误事件
backgroundAudioManager.onError((res) => {
  console.log(res.errMsg)
})

// 音频播放进度更新事件
backgroundAudioManager.onTimeUpdate(() => {
  console.log(backgroundAudioManager.currentTime)
})

6. Add interactive control

In order to allow users to more conveniently control audio playback, they can Add interactive controls. For example, add play button, pause button, stop button, switch songs and other functions. The following is a code example for adding interactive control:

<!-- 播放按钮 -->
<button bindtap="play">播放</button>

<!-- 暂停按钮 -->
<button bindtap="pause">暂停</button>

<!-- 停止按钮 -->
<button bindtap="stop">停止</button>

// 播放按钮事件
function play() {
  if (backgroundAudioManager.src) {
    backgroundAudioManager.play()
  } else {
    backgroundAudioManager.src = '音频链接'
  }
}

// 暂停按钮事件
function pause() {
  backgroundAudioManager.pause()
}

// 停止按钮事件
function stop() {
  backgroundAudioManager.stop()
}

7. Summary

Through the above steps, we can implement the background music playback function in the WeChat applet. First, you need to create an audio management object, then set the audio source and make related settings. Then, you can use audio playback control methods and events, and add interactive controls to manage audio playback and status. Remember, when developing mini programs, be sure to follow WeChat mini program development specifications to ensure code quality and application stability.

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