chore：优化

2 years ago · 8cc5ed0199
1 changed files with 4 additions and 3 deletions
--- a/src/base/list/virtualgrouplist.js
+++ b/src/base/list/virtualgrouplist.js
@ -97,12 +97,13 @@ BI.VirtualGroupList = BI.inherit(BI.Widget, {
            this.container[self.renderedIndex === -1 ? "populate" : "addItems"](items.map(function (item, i) {
                return o.itemFormatter(item, index + i);
            }), this);
-            var addedHeight = getElementHeight() - lastHeight;
+            var elementHeight = getElementHeight();
+            var addedHeight = elementHeight - lastHeight;
            this.tree.set(cnt, addedHeight);
            this.renderedIndex = cnt;
            cnt++;
            index += o.blockSize;
-            lastHeight = this.renderedIndex === -1 ? 0 : getElementHeight();
+            lastHeight = this.renderedIndex === -1 ? 0 : elementHeight;
        }
    },