微信小程序开发制作麦克风动画 实现放大、淡出效果

想做个录音机,第一步就卡在麦克风动画这里了.

先上gif.再吐槽.

① 上面gif中声波的动画是个半成品.没有循环播放.在微信小程序的开发文档上找了很久,也没找到循环模式的参数设置.用setInterval()并不执行动画.我在微信小程序文档 动画最下面找到这么一行字.这个锅是不是可以甩出去了?

ps:如果有同学能实现动画循环,一定告诉我.

② 麦克风里面是个帧动画.没有前端的基础,只能用非主流的办法凑合了.

用wx:if{{}}判断js中定义的值是不是等于图片对应的数字来控制图片的显示和隐藏.css中应该有更好的方法.我css基础不牢,就不说了.

上代码:

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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