diff --git a/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt b/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
index 894562639..e1e865830 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
@@ -122,6 +122,7 @@ class PageView(context: Context, attrs: AttributeSet) :
                 prevPage?.scrollToBottom()
             }
         }
+        pageDelegate?.onPageUp()
     }
 
     fun moveToPrevPage(noAnim: Boolean = true) {
diff --git a/app/src/main/java/io/legado/app/ui/widget/page/curl/CurlView.kt b/app/src/main/java/io/legado/app/ui/widget/page/curl/CurlView.kt
index 96f15eac9..086894434 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/curl/CurlView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/curl/CurlView.kt
@@ -48,8 +48,6 @@ class CurlView : GLSurfaceView, View.OnTouchListener, CurlRenderer.Observer {
     private var mPageLeft: CurlMesh
     private var mPageRight: CurlMesh
 
-    private var mPageProvider: PageProvider? = null
-
     private val mPointerPos = PointerPosition()
 
     private var mRenderer: CurlRenderer = CurlRenderer(this)
@@ -59,6 +57,14 @@ class CurlView : GLSurfaceView, View.OnTouchListener, CurlRenderer.Observer {
     // One page is the default.
     private var mViewMode = SHOW_ONE_PAGE
 
+    var mPageProvider: PageProvider? = null
+        set(value) {
+            field = value
+            mCurrentIndex = 0
+            updatePages()
+            requestRender()
+        }
+
     /**
      * Get current page index. Page indices are zero based values presenting
      * page being shown on right side of the book.
@@ -407,16 +413,6 @@ class CurlView : GLSurfaceView, View.OnTouchListener, CurlRenderer.Observer {
         mRenderer.setMargins(left, top, right, bottom)
     }
 
-    /**
-     * Update/set page provider.
-     */
-    fun setPageProvider(pageProvider: PageProvider) {
-        mPageProvider = pageProvider
-        mCurrentIndex = 0
-        updatePages()
-        requestRender()
-    }
-
     /**
      * Setter for whether left side page is rendered. This is useful mostly for
      * situations where right (main) page is aligned to left side of screen and
@@ -645,7 +641,7 @@ class CurlView : GLSurfaceView, View.OnTouchListener, CurlRenderer.Observer {
     /**
      * Updates bitmaps for page meshes.
      */
-    private fun updatePages() {
+    fun updatePages() {
         if (mPageProvider == null || mPageBitmapWidth <= 0
             || mPageBitmapHeight <= 0
         ) {
diff --git a/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt b/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
index 93174923d..a59a6a86b 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
@@ -209,6 +209,9 @@ abstract class PageDelegate(protected val pageView: PageView) {
     open fun onScroll() {//移动contentView， slidePage
     }
 
+    open fun onPageUp() {
+    }
+
     enum class Direction {
         NONE, PREV, NEXT
     }
diff --git a/app/src/main/java/io/legado/app/ui/widget/page/delegate/SimulationPageDelegate.kt b/app/src/main/java/io/legado/app/ui/widget/page/delegate/SimulationPageDelegate.kt
index 4b96fb6cd..0c552bb75 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/delegate/SimulationPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/delegate/SimulationPageDelegate.kt
@@ -13,7 +13,7 @@ class SimulationPageDelegate(pageView: PageView) : PageDelegate(pageView) {
         pageView.curlView ?: let {
             pageView.curlView = CurlView(pageView.context)
             pageView.addView(pageView.curlView)
-            pageView.curlView?.setPageProvider(PageProvider())
+            pageView.curlView?.mPageProvider = PageProvider()
             pageView.curlView?.setSizeChangedObserver(SizeChangedObserver())
             pageView.curlView?.currentIndex = 0
         }
@@ -33,6 +33,10 @@ class SimulationPageDelegate(pageView: PageView) : PageDelegate(pageView) {
     override fun onScrollStop() {
     }
 
+    override fun onPageUp() {
+        pageView.curlView?.updatePages()
+    }
+
     private inner class PageProvider : CurlView.PageProvider {
 
         override val pageCount: Int