diff --git a/src/runtime/sandbox.ts b/src/runtime/sandbox.ts
index f86b9ed8..12ac5555 100644
--- a/src/runtime/sandbox.ts
+++ b/src/runtime/sandbox.ts
@@ -194,11 +194,12 @@ export function jsObtainContext(id: string) {
 
 export function jsReleaseContext(id: string) {
     const context = gContexts.get(id)
+    const args = arguments
     if (context) {
         timerInfos.forEach((v, k) => {
             if (v.context === context) {
                 if (global.nativeClearTimer === undefined) {
-                    return Reflect.apply(_clearTimeout, undefined, arguments)
+                    return Reflect.apply(_clearTimeout, undefined, args)
                 }
                 timerInfos.delete(k)
                 nativeClearTimer(k)
diff --git a/src/ui/view.ts b/src/ui/view.ts
index 3ed26ffa..4f70088b 100644
--- a/src/ui/view.ts
+++ b/src/ui/view.ts
@@ -367,9 +367,11 @@ export abstract class Superview extends View {
     toModel() {
         const subviews = []
         for (let v of this.allSubviews()) {
-            v.superview = this
-            if (v.isDirty()) {
-                subviews.push(v.toModel())
+            if (v != undefined) {
+                v.superview = this
+                if (v.isDirty()) {
+                    subviews.push(v.toModel())
+                }
             }
         }
         this.dirtyProps.subviews = subviews
diff --git a/src/widget/flowlayout.ts b/src/widget/flowlayout.ts
index 5b8033d3..61d3191e 100644
--- a/src/widget/flowlayout.ts
+++ b/src/widget/flowlayout.ts
@@ -43,7 +43,11 @@ export class FlowLayout extends Superview implements IFlowLayout {
     private ignoreDirtyCallOnce = false
 
     allSubviews() {
-        return this.cachedViews.values()
+        if (this.loadMoreView) {
+            return [...this.cachedViews.values(), this.loadMoreView]
+        } else {
+            return this.cachedViews.values()
+        }
     }
 
     @Property
@@ -64,6 +68,15 @@ export class FlowLayout extends Superview implements IFlowLayout {
     @Property
     batchCount = 15
 
+    @Property
+    onLoadMore?: () => void
+
+    @Property
+    loadMore?: boolean
+
+    @Property
+    loadMoreView?: FlowLayoutItem
+
     reset() {
         this.cachedViews.clear()
         this.itemCount = 0
@@ -91,6 +104,13 @@ export class FlowLayout extends Superview implements IFlowLayout {
             return listItem.toModel()
         })
     }
+
+    toModel() {
+        if (this.loadMoreView) {
+            this.dirtyProps['loadMoreView'] = this.loadMoreView.viewId
+        }
+        return super.toModel()
+    }
 }
 
 export function flowlayout(config: IFlowLayout) {