uniapp 自定义二维码扫描

<view class="scanCode_box">
            <camera class='camera' mode="scanCode" @error="cameraError" @scancode='scancode' frame-size='large'>
                <cover-view class='animation' :animation="animation"></cover-view>
            </camera>
        </view>

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let animation = uni.createAnimation({}); export default { data（）{ animation, } } onShow() {             this.donghua()         },

　　

    methods: {
            donghua() {
                let that = this;
                let scode = true
                setInterval(function() {
                    if (scode) {
                        animation.translateY(200).step({
                            duration: 3000
                        })
                        scode = !scode;
                    } else {
                        animation.translateY(-10).step({
                            duration: 3000
                        })
                        scode = !scode;
                    }
                    that.animation = animation.export()

                }.bind(this), 3000)
            },
            scancode(e) {
                // 扫描结果
                let res = e.detail.result
                console.log(res);
            },
            
        }

.scanCode_box {
        width: 100%;
        display: flex;
        flex-direction: column;
        background-color: #f8f8f9;
        position: fixed;
        align-items: center;
        justify-content: space-around;
    }

    .camera {
        width: 480rpx;
        height: 450rpx;
        border-radius: 6rpx;
        margin: 30rpx;
    }

    .animation {
        position: absolute;
        left: 4rpx;
        width: 480rpx;
        height: 2rpx;
        background-color: #4CD964;
        border-radius: 50%;
    }