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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