uniapp在app上如何实现类似微信按住不放发送语音的功能？

这个需要用到三个事件

首先给按钮是绑定事件，需要给按钮绑定三个事件1.touchstart事件会在触摸按钮时触发，可以获取手指的初始坐标；2.touchmove事件在触摸后移动手指时触发，可以用来计算手手指的滑动距离；3.touchend事件在松开手指时候触发。

<button type="default" 
 v-show="mode === 'voice'" 
 @touchstart="handleTouchStart"
 @touchmove="handleTouchMove"
 @touchend="handleTouchEnd"
>按住 说话</button>

const recorderManager = uni.getRecorderManager();
// 开始录制语音
handleTouchStart(e){
	this.mask = true;
	recorderManager.start();
	this.length = 1;
	this.startX = e.touches[0].pageX;
	this.startY = e.touches[0].pageY;
	this.timer = setInterval(() => {
		this.length += 1;
		if(this.length >= 60) {
			clearInterval(this.timer);
			this.handleTouchEnd()
		}
	},1000);
},
// 语音录制时滑动事件
handleTouchMove(e){
	if(this.startX - e.touches[0].pageX > 14 && this.startY - e.touches[0].pageY > 50){
		this.needCancel = true;
	} else {
		this.needCancel = false;
	}
},
// 语音录制结束
handleTouchEnd(){
	this.mask = false;
	clearInterval(this.timer);
	recorderManager.stop();
	recorderManager.onStop((res) => {
		const message = {
			voice:res.tempFilePath,
			length:this.length
		};
		if(!this.needCancel){
			发送给对方，上传服务器
		}
		this.needCancel = false
	});
}

const innerAudioContext = uni.createInnerAudioContext();
// 播放语音
handleVoicePlay(item){
	item.isFirstPlay = false;
	innerAudioContext.src = item.message.voice;
	this.isPlay = !this.isPlay;
	this.isPlay ? innerAudioContext.play() : innerAudioContext.stop();
	innerAudioContext.onEnded(() => {
		this.isPlay = false;
	})
    innerAudioContext.onStop(() => {
		this.isPlay = false;
	})
},

还有一个页面遮罩层

<!-- 语音遮罩层 -->
<view class="voice-mask" v-show="mask">
	<!--语音条 -->
	<view class="voice-bar voice-del" :class="{voiceDel:needCancel}" :style={width:getVoiceBarWidth}>
		<image src="../static/icon/wave.png" class="voice-volume" :class="{volumeDel:needCancel}"></image>
		<view class="trangle-bottom" :class="{trangleDel:needCancel}"></view>
	</view>
	<!-- 底部区域 -->
	<view class="voice-send">
		<!-- 取消和转文字图标 -->
		<view class="voice-middle-wrapper">
			<!-- 取消 -->
			<view class="voice-left-wrapper">
				<view class="cancel-del" :class="{delTip:needCancel}">松开 取消</view>
				<view class="voice-middle-inner close" :class="{bigger:needCancel}">
					<image src="../static/icon/close-grey.png" class="close-icon"></image>
				</view>
			</view>
			<!-- 转文字 -->
			<view class="voice-middle-inner to-text">
				<text class="wen">文</text>
				<!-- <image src="" class="wen"></image> -->
			</view>
			<view class="send-tip" :class="{sendTipNone:needCancel}">松开 发送</view>
		</view>	
		<!-- 底部语音按钮 -->
		<view class="mask-bottom">
			<image src="../static/icon/voice-left.png"></image>
		</view>
	</view>	
</view>
 
 
......
 
<style>
   .voice-mask{
		position:fixed;
		top:0;
		right:0;
		bottom:0;
		left:0;
		/* display: flex;
		flex-direction: column;
		justify-content: flex-end;
		align-items: center; */
		background-color: rgba(0,0,0,0.8);
	}
	.voice-bar{
		position: absolute;
		left:50%;
		top: 50%;
		transform: translate(-50%,-30%);
		/* width: 230rpx; */
		height:150rpx;
		background-color:#51ff50;
		border-radius: 26rpx;
		margin-bottom: 220rpx;
	}
	.voiceDel{
		left:80rpx;
		top: 50%;
		width: 170rpx !important;
		transform: translateX(0%);
		transform: translateY(-30%);
		background-color: red;
	}
	.voice-volume{
		position: absolute;
		top: 50%;
		left: 50%;
		transform: translate(-50%,-50%);
		width: 160rpx;
		height: 36rpx;
	}
	.volumeDel{
		width: 80rpx;
	}
	.trangle-bottom{
		position: absolute;
		bottom: -38rpx;
		left:50%;
		transform: translateX(-50%);
		border-width: 20rpx;
		border-style: solid;
		border-color: #51FF50 transparent transparent transparent;
	}
	.trangleDel{
		border-color: red transparent transparent transparent;
	}
	.voice-send{
		position: absolute;
		bottom: 0;
		width: 100%;
	}
	.voice-middle-wrapper{
		width: 100%;
		display: flex;
		position:relative;
		justify-content: space-between;
		align-items: flex-end;
		margin-bottom: 40rpx;
	}
	.voice-left-wrapper{
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: flex-end;
	}
	.cancel-del{
		display:none;
	}
	.delTip{
		display:block;
		color:#bfbfbf;
		margin: 0 22rpx 18rpx 0;
	}
	.voice-middle-inner{
		display: flex;
		justify-content: center;
		align-items: center;
		background-color: rgba(0,0,0,0.2);
		width: 140rpx;
		height: 140rpx;
		border-radius: 50%;
	}
	.close{
		transform: rotate(350deg);
		margin-left: 80rpx;
	}	
	.bigger{
		width: 170rpx;
		height: 170rpx;
	}
	.to-text{
		transform: rotate(10deg);
		margin-right: 80rpx;
	}
	.close-icon{
		width: 80rpx;
		height: 80rpx;	
	}
	.wen{
		font-size: 40rpx;
		color:#bfbfbf;
	}
	.send-tip{
		position: absolute;
		left: 50%;
		bottom:0rpx;
		transform: translate(-50%,36%);
		color:#bfbfbf;
	}
	.sendTipNone{
		display: none;
	}
	.mask-bottom{
		position: relative;
		width: 100%;
		height:190rpx;
		border-top: #BABABB 8rpx solid;
		border-radius: 300rpx 300rpx 0 0;
		background-image: linear-gradient(#949794,#e1e3e1);
	}
	.mask-bottom image{
		position: absolute;
		width: 60rpx;
		height: 60rpx;
		top: 0;
		right:0;
		bottom: 0;
		left: 0;
		margin: auto;
	}
</style>