Taro 获取组件离顶部高度

export function queyElementYPosition(selector: string, component?: any): Promise<clientRectElement> {
    let query: SelectorQuery
    if (process.env.TARO_ENV == 'h5') {
        query = Taro.createSelectorQuery().in(component)
    } else {
        query = Taro.createSelectorQuery().in(component.$scope)
    }
    return new Promise((resolve, reject) => {
        const tmp = query.select(selector)
            .fields({ size: true, rect: true, scrollOffset: true, dataset: true }, (rect: fieldElement) => {
                !!rect ? resolve(rect) : reject(rect);
            });
        tmp && tmp.exec();
    })
}

使用：

setTimeout(() => {
            queyElementYPosition('#filter-placeholder', this)
                .then((v) => controller.setYPosition(v.top))
                .catch((e) => console.error('query element y position failed.', e))
        }, 300)