IntersectionObserver.disconnect

解释：停止监听，回调函数将不再触发。

示例

    data: {
        data: ''
    onReady() {
        const intersectionObserver = swan.createIntersectionObserver(this,{
            selectAll: true
        intersectionObserver.relativeTo('.scroll-view').observe('.ball', res => {
            this.setData('data', res.intersectionRect);
            console.log(res.intersectionRect.left); // 相交区域的左边界坐标
            console.log(res.intersectionRect.top); // 相交区域的上边界坐标
            console.log(res.intersectionRect.height); // 相交区域的高度
        this.intersectionObserver = intersectionObserver;
    },
    disconnect() {
        this.intersectionObserver && this.intersectionObserver.disconnect();
    }
});