uniapp ios 中 transfrom使用动态绑定，页面没有滑动

想要自己封装picker发现在app中动态绑定的style中transfrom 并没有生效， 只有befornMonted中生效了
我的代码时

<div id="picker">  
        <!--picker中可以滚动选择的内容-->  
        <div id="picker_column" @touchstart="touchstart" @touchmove="touchmove" @touchend="touchend" :style="data.picker_column_style">  
            <div class="picker_item" v-for="(i, index) in props.list">  
                <span :class="data.selected == index ? 'activeItem': ''">{{i}}</span>  
            </div>  
        </div>  
        <!--picker_selector位于picker中间，用来选中picker_item-->  
        <div id="picker_selector"></div>  
    </div>  

picker_column_style: {  
            transform: 'translate3d(0px, 20px, 0)',  
            transition: ''  
        }  

if(data.distance <= data.highPoint && data.distance >= data.lowPoint){  
                data.picker_column_style.transform= `translate3d(0px,${data.distance}px, 0)`  
                data.lastPoint = data.currentPoint  
            }else if(data.distance > data.highPoint){  
                 data.distance = data.highPoint  
            }else if(data.distance < data.lowPoint){  
                data.distance = data.lowPoint  
            }