fix 动态计算弹出框高度

@@ -18,7 +18,7 @@
       :rules="rules"
       :required="item.component_props.required"
       readonly
-      @touchstart.stop="openKeyboard()"
+      @touchstart.stop="openKeyboard($event)"
       :border="false"
     >
     </van-field>
@@ -41,11 +41,17 @@ const props = defineProps({
 
 const show = ref(false);
 
-const openKeyboard = () => {
+const openKeyboard = (e) => {
   show.value = true;
   // 键盘上移动
-  document.body.style.paddingBottom = "100px";
-  document.documentElement.scrollTop = 100;
+  const height =
+    window.innerHeight -
+    e.target.getBoundingClientRect().y -
+    e.target.getBoundingClientRect().height +
+    50;
+  document.body.style.paddingBottom = height + "px";
+  document.documentElement.scrollTop = height;
+  console.warn(height);
 };
 const blurKeyboard = () => {
   show.value = false;