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This article mainly introduces the microphone animation developed by WeChat applet: frame animation, amplification, and fade-out related information. Has very good reference value. Let’s take a look at it with the editor.
I want to make a voice recorder, but the first step is stuck in the microphone animation.
First upload the gif. Then complain.
① The animation of the sound wave in the gif above is a semi-finished product. There is no loop playback. I searched for a long time in the development documentation of the WeChat applet and could not find the parameter settings for the loop mode. Use setInterval( ) does not execute animation. I found such a line at the bottom of WeChat applet document animation. Can this pot be thrown away?
ps: If any students can realize animation loop, please tell me.
##② There is a frame animation in the microphone. There is no front-end foundation. We can only make do with non-mainstream methods.
Use wx:if{{}} to determine whether the value defined in js is equal to the number corresponding to the picture to control the display and hiding of the picture. There should be a better method in .css. My CSS foundation is not strong, so I won’t go into details.
The above code:1.index.wxml
<!--index.wxml--> <view class="voice-style" bindtap="startSpeak"> <image class="bg-style" src="../../images/voice_icon_speaking_bg_normal.png" ></image> <image class="bg-style" animation="{{spreakingAnimation}}" src="../../images/voice_video_loading_0.png"></image> <image class="bg-style" animation="{{spreakingAnimation_1}}" src="../../images/voice_video_loading_0.png"></image> <image class="bg-style" animation="{{spreakingAnimation_2}}" src="../../images/voice_video_loading_0.png"></image> <image class="sound-style" src="../../images/voice_icon_speech_sound_1.png" ></image> <image wx:if="{{j==2}}" class="sound-style" src="../../images/voice_icon_speech_sound_2.png" ></image> <image wx:if="{{j==3}}" class="sound-style" src="../../images/voice_icon_speech_sound_3.png" ></image> <image wx:if="{{j==4}}" class="sound-style" src="../../images/voice_icon_speech_sound_4.png" ></image> <image wx:if="{{j==5}}"class="sound-style" src="../../images/voice_icon_speech_sound_5.png" ></image> </view>
2.index.js
//index.js //获取应用实例 var app = getApp() Page({ data: { spreakingAnimation: {},//放大动画 j: 1,//帧动画初始图片 isSpeaking: false,//是否在录音状态 }, onLoad: function () { }, //点击开始说话 startSpeak: function () { var _this = this; if (!this.data.isSpeaking) { speaking.call(this); this.setData({ isSpeaking: true }) } else { //去除帧动画循环 clearInterval(this.timer) this.setData({ isSpeaking: false, j: 1 }) } }, }) function speaking() { //话筒帧动画 var i = 1; this.timer = setInterval(function () { i++; i = i % 5; _this.setData({ j: i }) return }, 200); //波纹放大,淡出动画 var _this = this; var animation = wx.createAnimation({ duration: 1000 }) animation.opacity(0).scale(3, 3).step();//修改透明度,放大 this.setData({ spreakingAnimation: animation.export() }) setTimeout(function(){ //波纹放大,淡出动画 var animation = wx.createAnimation({ duration: 1000 }) animation.opacity(0).scale(3, 3).step();//修改透明度,放大 _this.setData({ spreakingAnimation_1: animation.export() }) },250) setTimeout(function(){ //波纹放大,淡出动画 var animation = wx.createAnimation({ duration: 1000 }) animation.opacity(0).scale(3, 3).step();//修改透明度,放大 _this.setData({ spreakingAnimation_2: animation.export() }) },500) }
3.index.wxss
/**index.wxss**/ .voice-style { margin-top: 400px; display: flex; position: relative; flex-direction: column; align-items: center; } .bg-style { position: absolute; width: 100px; height: 100px; } .sound-style{ position: absolute; width: 37.6px; height: 60px; margin-top: 20px; }
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