修复:避免输入框错误

src/UI/Components/Board/BoardCommon.tsx

@@ -239,8 +239,8 @@ export class BoardRePosBlock extends React.Component<BroadPosProps> {
         }
         else if (k === 'count' && this.props.option.boardRelative === BrRelativePos.Div)
         {
-            this.countInputEl.focus();
-            this.countInputEl.setSelectionRange(0, this.spaceSizeInputEl.value.length);
+            this.countInputEl?.focus();
+            this.countInputEl?.setSelectionRange(0, this.spaceSizeInputEl.value.length);
         }
     };
     private handleChangePos = (e) =>
@@ -261,8 +261,8 @@ export class BoardRePosBlock extends React.Component<BroadPosProps> {
             }
             else
             {
-                this.countInputEl.focus();
-                this.countInputEl.setSelectionRange(0, this.spaceSizeInputEl.value.length);
+                this.countInputEl?.focus();
+                this.countInputEl?.setSelectionRange(0, this.spaceSizeInputEl.value.length);
             }
         }, 0);
     };
@@ -298,8 +298,7 @@ export class BoardRePosBlock extends React.Component<BroadPosProps> {
     {
         setTimeout(() =>
         {
-            if (this.countInputEl)
-                this.countInputEl.focus();
+            this.countInputEl?.focus();
         }, 0);
     }
     render()