效果图

代码实现

<view>
	<view class="tips">
	    已发送验证码至
	    <text class="tips-phone">{{ phoneNumber }}</text>
	</view>
	<view class="code-input-wrap">
	    <input class="code-input" v-model="codeNumber" type="number" :adjust-position="false" :auto-blur="true" maxlength="6" @input="handleInputClick" />
	    <view class="code-list">
	        <block v-for="(item, index) in 6" :key="index">
	            <view :class="['code-list-item', codeNumber.length == index ? 'active-item' : '']">{{ codeNumber[index] }}</view>
	        </block>
	    </view>
	</view>
	<view class="resending" v-if="isSending">{{ '重新发送(' + counter + 's)' }}</view>
	<view class="normal" v-else @click="handleResend">重新发送</view>
</view>

data() {
    return {
        phoneNumber: '',
        codeNumber: '',
        isPhoneValid: false,
        isCodeValid: false,
        isSending: false, // 验证码是否在发送中
        // 计时器对象
        timer: null,
        // 倒数60秒
        counter: 60
    }
},
methods: {
    // 输入验证码
    handleInputClick(e) {
        let val = e.detail.value
        this.codeNumber = val
        if (val && val.length == 6) {
            this.isCodeValid = true
        } else {
            this.isCodeValid = false
        }
    },
    // 获取验证码
    sendSmsCode() {
        if (this.isPhoneValid) {
            // 判断手机号格式是否符合要求
            if (!/^1[3456789]\d{9}$/.test(this.phoneNumber)) {
                uni.showToast({
                    title: '手机号格式不正确',
                    icon: 'none'
                })
                return false
            }
            // 判断复选框
            if (!this.isChecked) {
                this.showTips = true
                return false
            }
            // 调用接口，此处代码省略······
        }
    },
    // 倒计时
    countDown() {
        this.counter = 60
        this.isSending = true
        this.timer = setInterval(() => {
            this.counter--
            if (this.counter < 0) {
                this.reset()
            }
        }, 1000)
    },
    // 重置倒计时
    reset() {
        this.isSending = false
        if (this.timer) {
            clearInterval(this.timer)
            this.counter = 60
            this.timer = null
        }
    },
    // 重新发送
    handleResend() {
        this.codeNumber = ''
        this.sendSmsCode()
    }        
}

.tips {
    font-size: 28rpx;
    font-weight: 400;
    line-height: 36rpx;

    .tips-phone {
        font-weight: bold;
        margin-left: 20rpx;
    }
}

// 验证码输入
.code-input-wrap {
    margin: 40rpx 0;
    position: relative;
    height: 100rpx;

    .code-input {
        position: absolute;
        left: 0;
        top: 0;
        height: 100rpx;
        width: 100%;
        opacity: 0;
        z-index: 99;
        outline: none;
    }
    .code-list {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100rpx;
        display: flex;
        justify-content: space-between;
        .code-list-item {
            // flex: 1;
            width: 90rpx;
            height: 100rpx;
            background: #ffffff;
            border-radius: 16rpx;
            font-size: 36rpx;
            font-weight: 700;
            color: #adb3ba;
            line-height: 100rpx;
            text-align: center;
            margin-right: 10rpx;
            z-index: 5;
            box-sizing: border-box;
        }
        .code-list-item:last-child {
            margin-right: 0;
        }
        .active-item {
            border: 2rpx solid #ff466d;
        }
    }
}
.resending {
    font-size: 28rpx;
    font-weight: 500;
    line-height: 36rpx;
    margin-bottom: 60rpx;
    color: #a6acb2;
}
.normal {
    font-size: 28rpx;
    font-weight: 500;
    line-height: 36rpx;
    margin-bottom: 60rpx;
    color: #333;
}