view 部分

<view class="set-row">
	<view class="set-label">验证码</view>
	<view class="set-cell flex-center">
		<view class="flex_bd">
			<input maxlength="6" type="number" class="ui-input" v-model="code" placeholder="请输入验证码" />
		</view>
		<view class="code-btn" v-if="verifyShow" @click="timedown(60)">{{verText}}</view>
		<view class="code-btn" v-else >{{verifyTip+'s'}}</view>
	</view>
</view>

data() {
	return {
		code:'',
		verifyShow:true,
		verText:'获取验证码',
		verifyTip:60,
	}
},

timedown:function(num){
	let that = this;
	if(num == 0){
		that.verifyShow = true;
		that.verText = '重新获取'
		return clearTimeout();
	}else{
		that.verifyShow = false;			// 是否显示获取验证码
		setTimeout(function() {  
			that.verifyTip = num-1
			that.timedown(num-1);  
		}, 1000);//定时每秒减一  
	}
},