diff --git a/examples/component/input-demo.we b/examples/component/input-demo.we
index ed529841f8..7056218d0c 100644
--- a/examples/component/input-demo.we
+++ b/examples/component/input-demo.we
@@ -136,4 +136,4 @@
             }
         }
     };
-</script>
\ No newline at end of file
+</script>
diff --git a/examples/component/web-demo.we b/examples/component/web-demo.we
index 62cc209f08..2be930c75d 100644
--- a/examples/component/web-demo.we
+++ b/examples/component/web-demo.we
@@ -46,7 +46,6 @@
     module.exports = {
         methods: {
             goback: function() {
-                var $webview = require('@weex-module/webview');
                 var webElement = this.$el('webview');
                 $webview.goBack(webElement.ref);
              },
diff --git a/examples/module/stream-demo.we b/examples/module/stream-demo.we
index d52c1b0fe8..e1817c8383 100644
--- a/examples/module/stream-demo.we
+++ b/examples/module/stream-demo.we
@@ -91,7 +91,8 @@
       stream.fetch({
         method: 'POST',
         url: POST_URL,
-        type:'json'
+        type:'json',
+        body:JSON.stringify({username:'weex'})//or you can just use JSON Object {username:'weex'}
       }, function(ret) {
         if(!ret.ok){
           me.postResult = "request failed";
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
index 1d47b4d3a5..3b1df98888 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXEmbedComponent.m
@@ -151,16 +151,18 @@ - (void)_renderWithURL:(NSURL *)sourceURL
     };
     
     _embedInstance.onFailed = ^(NSError *error) {
-        if (weakSelf.errorView) {
-            return ;
-        }
-        
-        WXErrorView *errorView = [[WXErrorView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 135.0f, 130.0f)];
-        errorView.center = CGPointMake(weakSelf.view.bounds.size.width / 2.0f, weakSelf.view.bounds.size.height / 2.0f);
-        errorView.delegate = weakSelf;
-        [weakSelf.view addSubview:errorView];
-        
-        weakSelf.errorView = errorView;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            if (weakSelf.errorView) {
+                return ;
+            }
+            
+            WXErrorView *errorView = [[WXErrorView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 135.0f, 130.0f)];
+            errorView.center = CGPointMake(weakSelf.view.bounds.size.width / 2.0f, weakSelf.view.bounds.size.height / 2.0f);
+            errorView.delegate = weakSelf;
+            [weakSelf.view addSubview:errorView];
+            
+            weakSelf.errorView = errorView;
+        });
     };
     
     _embedInstance.renderFinish = ^(UIView *view) {
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
index 6baac1d9a7..9cc33842c2 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
@@ -110,7 +110,7 @@ - (void)updateAttributes:(NSDictionary *)attributes
         _imageSrc = [[WXConvert NSString:attributes[@"src"]] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
         [self updateImage];
     }
-    
+  
     [self configPlaceHolder:attributes];
     
     if (attributes[@"resize"]) {
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.m
index 7a728839d0..bcec5a7dc1 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.m
@@ -215,7 +215,7 @@ - (void)adjustSticky
     }
     CGFloat scrollOffsetY = ((UIScrollView *)self.view).contentOffset.y;
     for(WXComponent *component in self.stickyArray) {
-        if (CGPointEqualToPoint(component->_absolutePosition, CGPointZero)) {
+        if (isnan(component->_absolutePosition.x) && isnan(component->_absolutePosition.y)) {
             component->_absolutePosition = [component.supercomponent.view convertPoint:component.view.frame.origin toView:self.view];
         }
         CGPoint relativePosition = component->_absolutePosition;
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXSliderNeighborComponent.m b/ios/sdk/WeexSDK/Sources/Component/WXSliderNeighborComponent.m
index b3ec0de313..98fc5d4713 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXSliderNeighborComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXSliderNeighborComponent.m
@@ -514,6 +514,23 @@ - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gesture shouldReceiveTouch:(UIT
     return YES;
 }
 
+- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
+   //if the view which the otherGestureRecognizer works on is a scrollview and also it is scrollEnabled vertically ,at this time,we should not block the guesture from being recognized by the otherGestureRecognize
+    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] && [otherGestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
+        if ([otherGestureRecognizer.view isKindOfClass:[UIScrollView class]]) {
+            UIScrollView* scrollview = (UIScrollView *)otherGestureRecognizer.view;
+            if (scrollview.scrollEnabled) {
+                UIPanGestureRecognizer* panRcgn= (UIPanGestureRecognizer *)gestureRecognizer;
+                //check offset for confirming vertival movement
+                if (fabs([panRcgn translationInView:panRcgn.view].y) > fabs([panRcgn translationInView:panRcgn.view].x)*16) {
+                    return YES;
+                }
+            }
+        }
+    }
+    return NO;
+}
+
 
 - (void)didPan:(UIPanGestureRecognizer *)panGesture
 {
@@ -526,11 +543,12 @@ - (void)didPan:(UIPanGestureRecognizer *)panGesture
                 _scrolling = NO;
                 _decelerating = NO;
                 _previousTranslation = _vertical? [panGesture translationInView:self].y: [panGesture translationInView:self].x;
-                
+        
                 [_delegate sliderNeighborWillBeginDragging:self];
                 break;
             }
             case UIGestureRecognizerStateEnded:
+
             case UIGestureRecognizerStateCancelled:
             case UIGestureRecognizerStateFailed:
             {
@@ -566,6 +584,7 @@ - (void)didPan:(UIPanGestureRecognizer *)panGesture
             }
             case UIGestureRecognizerStateChanged:
             {
+             
                 CGFloat translation = _vertical? [panGesture translationInView:self].y: [panGesture translationInView:self].x;
                 CGFloat velocity = _vertical? [panGesture velocityInView:self].y: [panGesture velocityInView:self].x;
                 
@@ -1425,6 +1444,22 @@ - (UIView *)loadView
     return _sliderView;
 }
 
+- (void)dealloc
+{
+    _sliderView.delegate = nil;
+    _sliderView.dataSource = nil;
+    if (_autoPlay) {
+        [self _stopAutoPlayTimer];
+    }
+    _sliderView = nil;
+    [self.items removeAllObjects];
+}
+
+- (void)viewDidUnload
+{
+    [self.items removeAllObjects];
+}
+
 - (void)viewDidLoad
 {
     _sliderView = (WXSliderNeighborView *)self.view;
diff --git a/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m b/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m
index 501d7e0b3a..8d1ee670d4 100644
--- a/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m
+++ b/ios/sdk/WeexSDK/Sources/Events/WXComponent+Events.m
@@ -122,8 +122,7 @@ - (void)removeEvent:(NSString *)removeEventName
 
 - (void)_initEvents:(NSArray *)events
 {
-    NSArray *eventsCopy = [events copy];
-    for (NSString *addEventName in eventsCopy) {
+    for (NSString *addEventName in events) {
         [self _addEventOnMainThread:addEventName];
     }
 }
diff --git a/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m b/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
index e292c63f23..804e06ebc8 100644
--- a/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
+++ b/ios/sdk/WeexSDK/Sources/Manager/WXComponentManager.m
@@ -462,7 +462,6 @@ - (void)createFinish
         WX_MONITOR_SUCCESS(WXMTNativeRender);
         
         if(instance.renderFinish){
-            [instance creatFinish];
             instance.renderFinish(rootView);
         }
     }];
diff --git a/ios/sdk/WeexSDK/Sources/Model/WXComponent.m b/ios/sdk/WeexSDK/Sources/Model/WXComponent.m
index 8c04d8c03d..b63a61f897 100644
--- a/ios/sdk/WeexSDK/Sources/Model/WXComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Model/WXComponent.m
@@ -69,9 +69,10 @@ - (instancetype)initWithRef:(NSString *)ref
         _styles = styles ? [NSMutableDictionary dictionaryWithDictionary:styles] : [NSMutableDictionary dictionary];
         _attributes = attributes ? [NSMutableDictionary dictionaryWithDictionary:attributes] : [NSMutableDictionary dictionary];
         _events = events ? [NSMutableArray arrayWithArray:events] : [NSMutableArray array];
-        
         _subcomponents = [NSMutableArray array];
         
+        _absolutePosition = CGPointMake(NAN, NAN);
+        
         _isNeedJoinLayoutSystem = YES;
         _isLayoutDirty = YES;
         _isViewFrameSyncWithCalculated = YES;
diff --git a/ios/sdk/WeexSDK/Sources/Module/WXGlobalEventModule.m b/ios/sdk/WeexSDK/Sources/Module/WXGlobalEventModule.m
index bd5bbc1bc4..1ae4c600d2 100644
--- a/ios/sdk/WeexSDK/Sources/Module/WXGlobalEventModule.m
+++ b/ios/sdk/WeexSDK/Sources/Module/WXGlobalEventModule.m
@@ -46,7 +46,7 @@ - (void)removeEventListener:(NSString *)event
 {
     if (_eventCallback[event]) {
         [_eventCallback removeObjectForKey:event];
-        [[NSNotificationCenter defaultCenter] removeObserver:self name:event object:weexInstance];
+        [[NSNotificationCenter defaultCenter] removeObserver:self name:event object:nil];
     } else {
         WXLogWarning(@"eventName \"%@\" doesn't exist", event);
     }
@@ -70,4 +70,9 @@ - (void)fireGlobalEvent:(NSNotification *)notification
     }
 }
 
+- (void)dealloc
+{
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 @end
diff --git a/ios/sdk/WeexSDK/Sources/Module/WXStreamModule.m b/ios/sdk/WeexSDK/Sources/Module/WXStreamModule.m
index 594c0d29ba..4b89df73e4 100644
--- a/ios/sdk/WeexSDK/Sources/Module/WXStreamModule.m
+++ b/ios/sdk/WeexSDK/Sources/Module/WXStreamModule.m
@@ -79,7 +79,6 @@ - (void)fetch:(NSDictionary *)options callback:(WXModuleCallback)callback progre
     }
     urlStr = newUrlStr;
     NSDictionary *headers = [options objectForKey:@"headers"];
-    NSString *body = [options objectForKey:@"body"];
     NSString *type = [options objectForKey:@"type"];
     NSURL *url = [NSURL URLWithString:urlStr];
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
@@ -95,8 +94,27 @@ - (void)fetch:(NSDictionary *)options callback:(WXModuleCallback)callback progre
         NSString *value = [headers objectForKey:header];
         [request setValue:value forHTTPHeaderField:header];
     }
-    [request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
 
+    if ([options objectForKey:@"body"]) {
+        NSData * body = nil;
+        if ([[options objectForKey:@"body"] isKindOfClass:[NSString class]]) {
+            // compatible with the string body
+            body = [[options objectForKey:@"body"] dataUsingEncoding:NSUTF8StringEncoding];
+        }
+        if ([[options objectForKey:@"body"] isKindOfClass:[NSDictionary class]]) {
+            body = [[WXUtility JSONString:[options objectForKey:@"body"]] dataUsingEncoding:NSUTF8StringEncoding];
+        }
+        if (!body) {
+            [callbackRsp setObject:@(-1) forKey:@"status"];
+            [callbackRsp setObject:@false forKey:@"ok"];
+            callback(callbackRsp);
+                
+            return;
+        }
+        
+        [request setHTTPBody:body];
+    }
+  
     [callbackRsp setObject:@{ @"OPENED": @1 } forKey:@"readyState"];
     
     progressCallback(callbackRsp, TRUE);
diff --git a/ios/sdk/WeexSDK/Sources/Protocol/WXModuleProtocol.h b/ios/sdk/WeexSDK/Sources/Protocol/WXModuleProtocol.h
index 327d6d7cd0..1e2528c699 100644
--- a/ios/sdk/WeexSDK/Sources/Protocol/WXModuleProtocol.h
+++ b/ios/sdk/WeexSDK/Sources/Protocol/WXModuleProtocol.h
@@ -24,7 +24,6 @@
  * @discussion callback data to js, the id of callback function will be removed to save memory.
  */
 typedef void (^WXModuleCallback)(id result);
-typedef void (^WXModuleKeepAliveCallback)(id result, BOOL keepAlive);
 
 /**
  * @abstract the module callback , result can be string or dictionary.