diff --git a/ios/sdk/WeexSDK/Sources/Component/WXListComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXListComponent.m
index c48a2c5b0f..bd8ff7bbb0 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXListComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXListComponent.m
@@ -149,7 +149,12 @@ - (void)cellDidLayout:(WXCellComponent *)cell
     WXAssert(indexPath, @"Laid out cell:%@ has not been inserted to cell list before", cell);
 
     if (indexPath.row == 0) {
-        cell.absolutePosition = CGPointZero;
+        if (_tableView.tableHeaderView) {
+            cell.absolutePosition = CGPointMake(0, _tableView.tableHeaderView.frame.size.height);
+        } else {
+            cell.absolutePosition = CGPointZero;
+        }
+
     } else {
         WXCellComponent *previousCell = _cellComponents[indexPath.row - 1];
         CGPoint previousCellPostion = previousCell.absolutePosition;
@@ -246,18 +251,19 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
 {
     static NSString *reuseIdentifier = @"WXTableViewCell";
     
-    WXCellComponent *cell = _cellComponents[indexPath.row];
-    if (cell.scope.length > 0) {
-        //        reuseIdentifier = cell.scope;
-    }
-    
-    UITableViewCell *cellView = [_tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
+    UITableViewCell *cellView = [_tableView cellForRowAtIndexPath:indexPath];
     if (!cellView) {
         cellView = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
         cellView.backgroundColor = [UIColor clearColor];
     } else {
     }
     
+    WXCellComponent *cell = [_cellComponents wx_safeObjectAtIndex:indexPath.row];
+    
+    if (!cell) {
+        return cellView;
+    }
+    
     if (cell.view.superview == cellView.contentView) {
         return cellView;
     }
diff --git a/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m b/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
index 17971ef812..7bca12253b 100644
--- a/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
+++ b/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
@@ -361,7 +361,7 @@ - (void)createFinish
     WXComponent *root = [_indexDict objectForKey:WX_SDK_ROOT_REF];
     WXSDKInstance *instance  = self.weexInstance;
     [self _addUITask:^{        
-        UIView *rootView = root.view;
+        UIView *rootView = instance.rootView;
         [instance finishPerformance];
         
         if(instance.renderFinish){
diff --git a/ios/sdk/WeexSDK/Sources/Utility/WXConvert.m b/ios/sdk/WeexSDK/Sources/Utility/WXConvert.m
index dd4d8eb751..fc69a3d9dd 100644
--- a/ios/sdk/WeexSDK/Sources/Utility/WXConvert.m
+++ b/ios/sdk/WeexSDK/Sources/Utility/WXConvert.m
@@ -54,7 +54,7 @@ + (NSString *)NSString:(id)value
     if([value isKindOfClass:[NSString class]]){
         return value;
     } else if([value isKindOfClass:[NSNumber class]]){
-        return [NSString stringWithFormat:@"%f", [value floatValue]];
+        return [((NSNumber *)value) stringValue];
     } else {
         WXLogError(@"Convert Error:%@ can not be converted to string", value);
     }
diff --git a/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m b/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
index 21bdd9f5cf..c875d666f1 100644
--- a/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
+++ b/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
@@ -80,26 +80,6 @@ CGSize WXScreenSize(void)
     return [UIScreen mainScreen].bounds.size;
 }
 
-CGFloat WXScreenResizeRadio(void)
-{
-    static CGFloat resizeScale;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{
-        CGSize size = WXScreenSize();
-        CGFloat deviceWidth;
-        if (size.width > size.height) {
-            // Landscape
-            deviceWidth = size.height;
-        } else {
-            deviceWidth = size.width;
-        }
-        
-        resizeScale = deviceWidth / WXDefaultScreenWidth;
-    });
-    
-    return resizeScale;
-}
-
 CGFloat WXRoundPixelValue(CGFloat value)
 {
     CGFloat scale = WXScreenScale();
@@ -386,4 +366,29 @@ + (void)addStatTrack:(NSString *)appName
     [task resume];
 }
 
+CGFloat WXScreenResizeRadio(void)
+{
+    return [WXUtility screenResizeScale];
+}
+
++ (CGFloat)screenResizeScale
+{
+    static CGFloat resizeScale;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        CGSize size = WXScreenSize();
+        CGFloat deviceWidth;
+        if (size.width > size.height) {
+            // Landscape
+            deviceWidth = size.height;
+        } else {
+            deviceWidth = size.width;
+        }
+        
+        resizeScale = deviceWidth / WXDefaultScreenWidth;
+    });
+    
+    return resizeScale;
+}
+
 @end