2、在坐标位置显示一个十字架，提示2秒后关闭，方便调试

function showXyTap(x,y){
    var xy = floaty.window(
        <frame gravity="center" w="30" h="30" alpha="0.6">
            <View w="2" h="30" bg="#ff00e4"></View>
            <View w="30" h="2" bg="#00ff42"></View>
        </frame>
    );
    xy.setPosition(Math.abs(x-15),Math.abs(y-15));
    setTimeout(()=>{
        xy.close();
    }, 2000);
}