Issue Fix spritebuilder/SpriteBuilder#788

Author: cocojoe

cocos2d-ui/CCBReader/CCAnimationManager.m

@@ -171,6 +171,10 @@ - (CCBSequence*)sequenceFromSequenceId:(int)seqId {
 - (CCActionInterval*)actionFromKeyframe0:(CCBKeyframe*)kf0 andKeyframe1:(CCBKeyframe*)kf1 propertyName:(NSString*)name node:(CCNode*)node {
     float duration = kf1.time - kf0.time;
 
+    if(kf0.easingType==kCCBKeyframeEasingInstant) {
+        duration = 0;
+    }
+    
     if ([name isEqualToString:@"rotation"]) {
         return [CCActionRotateTo actionWithDuration:duration angle:[kf1.value floatValue] simple:YES];
     } else if ([name isEqualToString:@"position"]) {
@@ -855,14 +859,15 @@ - (CCActionSequence*)createActionForNode:(CCNode*)node sequenceProperty:(CCBSequ
 
         CCActionInterval* action = [self actionFromKeyframe0:startKF andKeyframe1:endKF propertyName:seqProp.name node:node];
 
-        // Create delay to fix instant easing on non instant actions
-        if(startKF.easingType==kCCBKeyframeEasingInstant &&
-           ![seqProp.name isEqualToString:@"spriteFrame"] &&
-           ![seqProp.name isEqualToString:@"visible"]) {
-            [actions addObject:[CCActionDelay actionWithDuration:action.duration]];
-        }
-        
         if (action) {
+            
+            // Instant
+            if(startKF.easingType==kCCBKeyframeEasingInstant &&
+               ![seqProp.name isEqualToString:@"spriteFrame"] &&
+               ![seqProp.name isEqualToString:@"visible"]) {
+                [actions addObject:[CCActionDelay actionWithDuration:action.duration]];
+            }
+            
             // Apply Easing
             action = [self easeAction:action easingType:startKF.easingType easingOpt:startKF.easingOpt];
             [actions addObject:action];