Merge pull request #11592 from fusijie/add_EaseRateAction_create_method

Add EaseRateAction::create() method.

cocos/2d/CCActionEase.cpp

@@ -90,6 +90,24 @@ ActionInterval* ActionEase::getInnerAction()
 // EaseRateAction
 //
 
+EaseRateAction* EaseRateAction::create(ActionInterval* action, float rate)
+{
+    EaseRateAction *easeRateAction = new (std::nothrow) EaseRateAction();
+    if (easeRateAction)
+    {
+        if (easeRateAction->initWithAction(action, rate))
+        {
+            easeRateAction->autorelease();
+        }
+        else
+        {
+            CC_SAFE_RELEASE_NULL(easeRateAction);
+        }
+    }
+    
+    return easeRateAction;
+}
+
 bool EaseRateAction::initWithAction(ActionInterval *action, float rate)
 {
     if (ActionEase::initWithAction(action))

cocos/2d/CCActionEase.h

@@ -97,6 +97,14 @@ private:
 class CC_DLL EaseRateAction : public ActionEase
 {
 public:
+    /**
+     @brief Creates the action with the inner action and the rate parameter.
+     @param action A given ActionInterval
+     @param rate A given rate
+     @return An autoreleased EaseRateAction object.
+    **/
+    static EaseRateAction* create(ActionInterval* action, float rate);
+    
     /**
      @brief Set the rate value for the ease rate action.
      @param rate The value will be set.