zhangzengfei
2021-06-04 570c4304b907150335f3f8e9d19c4bec6a425757
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<template>
    <view :class="{'my-tabs':true,'space-between':formatBe}">
        <view  v-for="(item,index) in getModelData" :key="index" :class="{'tab-item':true,'active':activeIndex==index}" @tap="tap(index)">
            {{item.label}}
        </view>
    </view>
</template>
 
<script>
    export default {
        props:['modelData','initIndex'],
        data() {
            return {
                defaultInfo:{
                    data:[
                        {label:"测试",},
                        {label:"测试"},
                        {label:"测试"},
                    ],
                },
                activeIndex:0,//默认索引
            }
        },
        computed:{
            getModelData(){
                return this.modelData||this.defaultInfo.data
            },
            formatBe(){
                return this.modelData
                        ?this.modelData.length>4?true:false
                        :false
            }
        },
        methods: {
            tap(index){
                if(index!==this.activeIndex)this.$emit("change",index);
                this.activeIndex=index;
            },
            /**
             * @name 初始化activeIndex
             */
            initActive(){
                this.activeIndex=this.initIndex||this.activeIndex
            }
        },
        created() {
            this.initActive()
        },
    }
</script>
<style lang='scss'>
    .my-tabs {
        height: 88upx;
        font-size: 28upx;
        display: flex;
        justify-content: space-around;
        box-sizing: border-box;
        border-top: 2upx solid #dddddd;
        border-bottom: 2upx solid #dddddd;
        min-width: 100%;
        overflow-x: auto;
        
        .tab-item{
            line-height: 48upx;
            padding: 20upx;
            min-width: 100upx;
            text-align: center;
        }
        .tab-item.active{
            position: relative;
            color: #3682FF;
        }
        .tab-item.active::after{
            content: "";
            position: absolute;
            bottom: 0;
            left:50%;
            transform: translateX(-50%);
            width: 100%;
            border-bottom: 4upx solid #3682FF;
            animation: test ease 1 1.5s;
        }
    }
    .my-tabs.space-between{
        justify-content: space-between;
    }
    @keyframes test{
        0%{width: 100%}
        50%{width: 150%}
        100%{width: 100%}
    }
</style>