下拉菜单 - spinner

# 下来菜单控件: spinner ## setSelection() 设置选中项 ```js ui.objectId.setSelection(index); ``` ## getSelectedItemPosition() 获取选中项 ```js ui.objectId.getSelectedItemPosition(); ``` # 实例 ```js "ui"; ui.layout( <vertical padding="16"> <horizontal> <text textSize="16sp">下拉菜单</text> <spinner id="sp1" entries="选项1|选项2|选项3"/> </horizontal> <horizontal> <text textSize="16sp">对话框菜单</text> <spinner id="sp2" entries="选项4|选项5|选项6" spinnerMode="dialog"/> </horizontal> <button id="ok">确定</button> <button id="select3">选择选项3</button> </vertical> ); ui.ok.on("click", ()=>{ var i = ui.sp1.getSelectedItemPosition(); var j = ui.sp2.getSelectedItemPosition(); toast("您的选择是选项" + (i + 1) + "和选项" + (j + 4)); }); ui.select3.on("click", ()=>{ ui.sp1.setSelection(2); }); ```