Implement audio playback function in WeChat applet

Title: Implementing the audio playback function in WeChat Mini Program

As a fast and convenient application development platform, WeChat Mini Program provides developers with many rich Function. In small programs, audio playback function is one of the very common and important requirements. This article will introduce how to implement the audio playback function in WeChat applet and provide specific code examples.

1. Preparation work

Before we start to implement the audio playback function, we need to do some preparation work. First, make sure you have installed the latest version of WeChat developer tools and registered a WeChat developer account. Secondly, select a suitable audio resource and save it in the appropriate location of the applet project.

2. Create a page

In the WeChat developer tools, create a new page to implement the audio playback function. You can right-click the project root directory, select "New Page" and fill in the corresponding page name. In the json file of the page, add the components you need to use.

For example, we can create an audio page with the json code as follows:

{
"usingComponents": {

"audio": "/components/audio-component/audio-component"

}
}

3. Implement the audio playback function

On the page we just created, we can implement the audio playback function by using the

where, id The attribute is used to uniquely identify the audio component, the src attribute is used to specify the audio source, the controls attribute is used to display the audio playback control bar, and the autoplay attribute is used to automatically play audio.

Next, in the js file of the page, add the following code to obtain the instance corresponding to the tag, and set the audio-related attributes:

Page( {
data: {

audioUrl: '' // 音频资源的路径

},
onLoad: function () {

this.setData({
  audioUrl: '/static/audio/sample.mp3'
})

},
onReady: function() {

this.audioCtx = wx.createAudioContext('myAudio');

},
playAudio: function() {

this.audioCtx.play();

},
pauseAudio: function() {

this.audioCtx.pause();

},
stopAudio: function() {

this.audioCtx.seek(0);
this.audioCtx.pause();

}
})

Among them, the onLoad function is used to set the path of the audio resource when the page is loaded, the onReady function is used to create the audio context object, the playAudio function is used to start playing audio, and pauseAudio function is used to pause the audio, and the stopAudio function is used to stop the audio and return to the starting position.

4. Implement playback control

In order to provide a better user experience, we can add some buttons on the page to control audio playback. For example, we can add the following code to the wxml file of the page:

Play
Pause
Stop

Among them, the click event of the button is bound to the corresponding function by using the bindtap attribute.

Through the above steps, we can implement the audio playback function in the WeChat applet. It should be noted that in order to ensure that the audio can be played normally, we need to ensure that the path of the audio resource is correct. In addition, you can also add some other functions according to your needs, such as audio fast forward, rewind, volume control, etc.

The following is the code of the entire example:

https://example.com/audio-sample-wxapp.zip

By referring to the above steps and code examples, I believe You can easily implement audio playback function in WeChat applet. Hope this article is helpful to you!

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